HP (Hewlett-Packard) 4000 Series, 4050 Series manual

HP LaserJet 4000 and 4050 Series Printers Service Manual HP LaserJet 40 00 and 4050 Series Prin ters Service Manual Printed on at least 50% T otal Recycled Fiber with at least 10% P ost-Consumer P aper Copyright© 1999 He wlett-Packard Co. Printed in USA Manual Part No. C4251-91003 *C4251-91003* *C4251-91003* C4251-91003[...]

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HP LaserJet 4000 and 4050 Ser ies Pr inters Service Manual _____________[...]

Hewlett-P ackard Company 11311 Chinden Boule vard Boise, Idaho 83714 USA © Copyright He wlett - Pac kard Company 1999 All Rights Reser ved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the cop yr ight laws. Publication number C4251-91003 First edition, April 1999 W arranty The inf[...]

Contents - 1 Contents 1 Printer Description Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Printer Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 Mod[...]

Contents-2 3 Printer Operation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Using the Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Control Panel Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Control Panel Lights . . . . . . . [...]

Contents-3 5 Functional Information Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Power Supply System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 AC/DC Power Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 Overcurrent Overvoltage Protection .[...]

Contents-4 6 Removing and Replacing Parts Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 Removal and Replacement Strategy . . . . . . . . . . . . . . . . . . . . . . . 6-2 Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3 Removing Covers . . . . . [...]

Contents-5 7 Troubleshooting Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 Troubleshooting Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2 Troubleshooting Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4 Troubleshooting Flowchart (Continued) . . . [...]

Contents-6[...]

Overview 1-1 1 Pr inter Descr iption Overview This chapter discusses the f ollowing: ● Printer Features ● Identification ● Site Requirements ● P aper Specifications ● Saf ety Information[...]

1-2 Printer Description Printer Features T able 1-1. Printer Features f or the HP LaserJet 4000 Series Printer Speed 17 pages per minute (ppm) 100 MHz RISC microprocessor First page out = 15 sec. Resolution 300 dpi with PCL5e/HP’ s PostScript TM Le vel 2 em ulation (PS) 600 dpi with PCL5e/PS HP F astRes 1200 (PCL6 only) HP ProRes 1200 at half eng[...]

Printer Features 1-3 P aper T ra y s 100-sheet T ra y 1 ● Size: 3 b y 5 in to legal (76 by 127 mm to 216 b y 356 mm) 500-sheet T ra y 2 (HP LaserJet 4000/ 4000 N) ● Size: letter , legal, A4 250-sheet T ra ys 2 and 3 (HP LaserJet 4000 T/ 4000 TN) ● Size: letter , A4, ex ecutive, legal, B5 (ISO), B5 (JIS), A5 Optional Universal 500-sheet T ray [...]

1-4 Printer Description T able 1-2. Printer Features for the HP LaserJet 4050 Series Printer Speed 17 pages per minute (ppm) 133 MHz RISC microprocessor First page out = 15 sec. “RIP ONCE” capability with 16 MB or hard disk option Resolution 300 dpi with PCL5e/HP’ s PostScript TM Le vel 2 em ulation (PS) 600 dpi with PCL5e/PS HP F astRes 1200[...]

Printer Features 1-5 P aper T ra y s 100-sheet T ra y 1 ● Size: 3 b y 5 to legal (76 by 127 mm to 216 b y 356 mm) 500-sheet T ra y 2 (HP LaserJet 4050/ 4050 N) ● Size: letter , legal, A4 250-sheet T ra ys 2 and 3 (HP LaserJet 4050 T/ 4050 TN) ● Size: letter , A4, ex ecutive, legal, B5 (ISO), B5 (JIS), A5 Optional 500-sheet Universal T ray ●[...]

1-6 Printer Description T able 1-3. Comparison of HP LaserJet 4000 Series Printers HP LaserJet 4000 HP LaserJet 4000 T HP LaserJet 4000 N HP LaserJet 4000 TN Ethernet 10-T/ 10-2 LocalT alk optional optional standard standard Max. # Input Bins 3434 Standard RAM 4 MB internal 4 MB inter nal 8 MB internal 8 MB inter nal 250-Sheet T ra y not availab le[...]

Printer Features 1-7 T able 1-4. Comparison of HP LaserJet 4050 Series Printers HP LaserJet 4050 HP LaserJet 4050 T HP LaserJet 4050 N HP LaserJet 4050 TN Ethernet 10-T/ 10-2 LocalT a lk optional optional optional optional 10/100 Base TX optional optional standard standard Max. # Input Bins 3434 Standard RAM 8 MB internal 8 MB inter nal 16 MB inter[...]

1-8 Printer Description Identification Model and Serial Numbers The model number and printer serial number are listed on an identification label located under the top cov er on the r ight side of the printer . The model number is alphanumeric, such as C4253A f or the HP LaserJet 4050 N pr inter . The serial number contains inf or mation about the C[...]

Site Requirements 1-9 Site Requirements The f ollowing en vironmental specifications must be maintained to ensure the proper operation of the printer . Consider the following points bef ore installing the printer : ● Install in a well-v entilated, dust-free area. ● Install on a hard, flat and continuous surf ace, with all four printer f eet le [...]

1-10 Printer Description Space Requirements Figure 1-2 Printer Dimensions Printer W e ight (without T oner Cartridg e) ● HP LaserJet 4000/4000 N and 4050/4050 N pr inters: 39.27 lb (17.85 kg) ● HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN pr inters: 45.66 lb (20.71 kg) 15.4 in (39.0 cm) 16.77 in (42.6 cm) printer only, Rear Output Bin closed H[...]

Site Requirements 1-11 En vironmental Requirements T able 1-6. Printer and T oner Cartridge Envir onmental Conditions Item Operating Storage T emperature 50-91 ° F (10-32 ° C) 32 to 95° F (0 to 35°C) Relative Humidity 20-80% RH (with no condensation) 10% to 95% RH T able 1-7. Acoustic Emissions (Per ISO 9296) Printer State Sound P ower Printing[...]

1-12 Printer Description P aper Specifications The f ollowing tab les show paper specifications f or the HP LaserJet 4000 and 4050 ser ies printer . * The printer supports a wide range of paper sizes. Check the printer software for supported sizes. To print custom-size paper see the user’s guide. ** Capacity may vary depending on paper weight and[...]

Paper Specifications 1-13 * The printer supports a wide range of paper sizes. Check the printer software for supported sizes. ** Capacity may vary depending on paper weight and thickness, and environmental conditions. *** To print custom-size paper see the user’s guide. T able 1-10. Paper Specifications, T rays 2 and 3 (HP LaserJet 4000 T/4000 TN[...]

1-14 Printer Description * The printer supports a wide range of paper sizes. Check the printer software for supported sizes. ** Capacity may vary depending on paper weight and thickness, and environmental conditions. *** To print custom-size paper see the user’s guide. T able 1-11. Paper Specifications, Optional 500-Sheet Univer sal T ray Support[...]

Paper Specifications 1-15 * The printer supports a wide range of paper sizes. Check the printer software for supported sizes. ** Capacity may vary depending on paper weight and thickness, and environmental conditions. Suppor ted T ypes of P aper The printer suppor ts the following types of paper: T able 1-12. Paper Specifications, Optional En velop[...]

1-16 Printer Description Guidelines f or Using P aper F or best results, use conv entional 20 lb (75 g/m 2 ) paper . Make sure the paper is of good quality and free of cuts, nic ks , tears , spots , loose par ticles, dust, wrinkles, v oids, and curled or bent edges. If you are unsure what type of paper y ou are loading (such as bond or recycled), c[...]

Paper Specifications 1-17 Note Do not use letterhead paper that is printed with low-temperature inks, such as those used in some types of thermography . Do not use raised letterhead. The printer uses heat and pressure to fuse T oner to the paper . Make sure that any colored paper or preprinted f or ms use inks that are compatible with the printer?[...]

1-18 Printer Description P aper W eight Equivalence T able Use this table to determine appro ximate equivalent points in w eight specifications other than U .S. bond w eight. For e xample, to determine the equiv alent of 20 lb U.S . bond weight paper in U .S. cov er weight, locate the bond weight (in the third row , first column) and scan across th[...]

Paper Specifications 1-19 Labels CA UTION T o av oid damaging the pr inter , use only labels recommended for use in laser printers. If you ha ve problems printing labels, use T ra y 1 and open the Rear Output Bin. Ne ver print on the same sheet of labels more than once. Label Construction When selecting labels, consider the quality of each componen[...]

1-20 Printer Description En velopes En velope Construction Env elope constr uction is critical. Envelope f old lines can vary considerab ly , not only between manuf acturers, b ut also within a bo x from the same manuf acturer. Successful printing on en velopes depends upon the quality of the env elopes. When selecting env elopes, consider the foll[...]

Paper Specifications 1-21 En velopes with Double Side Seams Some env elopes have v er tical seams at both ends of the en velope , rather than diagonal seams. This style of env elope may be more lik ely to wrinkle. When using env elopes with double side seams, be sure the seam e xtends all the wa y to the cor ner of the env elope as illustrated belo[...]

1-22 Printer Description En velope Margins The f ollowing tab le gives typical address margins f or a Commercial #10 or DL env elope. Note F or the best print quality , position margins no closer than 0.6 in (15 mm) from the edges of the env elope. En velope Storage Proper storage of en velopes helps contrib ute to good pr int quality . Env elopes [...]

Paper Specifications 1-23 Car d Stock and Hea vy Paper Many types of card stoc k can be printed from T ra y 1, including index cards and postcards. Some types of card stoc k perf or m better than others because the construction is better suited for f eeding through a laser printer . F or optimum printer performance, do not use paper heavier than 53[...]

1-24 Printer Description Safety Inf ormation Laser Safety Statement The Center f or Devices and Radiological Health (CDRH) of the U .S. F ood and Drug Administration has implemented regulations for laser products manuf actured since A ugust 1, 1976. Compliance is mandator y f or products marketed in the United States. The printer is cer tified as a[...]

Safety Information 1-25 FCC Regulations This equipment has been tested and f ound to comply with the limits f or a Class B digital device , pursuant to P ar t 15 of the FCC rules. These limits are designed to provide reasonab le protection against harmful interference in a residential installation. This equipment generates, uses , and can radiate r[...]

1-26 Printer Description Laser Statement f or Finland LASERTUR V ALLISUUS LUOKAN 1 LASERLAITE KLASS 1 LASER APP ARA T HP LaserJet 4000/4000 T/4000 N/4000 TN and 4050/4050 T/4050 N/4050 TN -laserkirjoitin on käyttäjän kannalta tur v allinen luokan 1 laser laite. Normaalissa käytössä kirjoittimen suojakotelointi estää lasersäteen pääsyn la[...]

Safety Information 1-27 T oner Safety Note T oner may stain clothing. Skin and clothing are best cleaned b y removing as much T oner as possib le with a dr y tissue, then w ashing with cold water . Hot water causes T oner to melt and perm anently fuse into clothing. The T oner Car tridge/Drum Mater ial Saf ety Data Sheet (MSDS) can be obtained by c[...]

1-28 Printer Description En vironmental Pr oduct Stewar dship Protecting the En vir onment Hewlett-P ackard Company is committed to pro viding quality products in an environmentally-sound manner . The printer has been designed to minimize impacts on the en vironment. The printer design eliminates: Ozone Production The printer uses charging rollers [...]

Overview 2-1 2 Ser vice Approach Overview This chapter discusses the f ollowing: ● Ser vice Approach ● P ar ts and Supplies ● W arranty Statement[...]

2-2 Service Approach Service Approac h Repair of the printer nor mally begins with use of the printer’s internal diagnostics in conjunction with the troubleshooting procedures in Chapter 7. Once a f aulty par t is located, repair is generally accomplished by assemb ly lev el replacement of Field Replaceable Units (FR Us). Some mechanical assembli[...]

Parts and Supplies 2-3 P ar ts and Supplies Or dering Information Field replaceable and accessory par t numbers are f ound in Chapter 8 of this manual. Replacement par ts ma y be ordered from HP’ s Service Materials Organization (SMO) or Suppor t Mater ials Europe (SME), divisions of Product Suppor t Division (PSD). Use only accessories specifica[...]

2-4 Service Approach Helpful Documentation T able 2-1 lists par t numbers to order documentation. T able 2-1. Helpful Documentation Item Description or Use P art Number HP LaserJet Printer F amily P aper Specification Guide A guide to using paper and other print media with HP LaserJet printers. 5040-9072 PCL 5/PJL T echnical Reference Documentation[...]

Parts and Supplie s 2-5 Se r vice and Suppo r t CD- R OM f or the H P LaserJet 4050 P r inters An interacti v e training CD- R OM f or p r inter se r vice representati v es and customer care specialist s . C4251-60106 HP LaserJet 4000 and 4050 Se r ies P r inters Se r vice Manual A combined se r vice manual f or both se r ies of p r inter s . C4251[...]

2-6 Service Approach Phone Numbers f or Ordering ● SMO (Ser vice Materials Organization) 1-800-227-8164 (U .S. only) ● SME (Suppor t Materials Europe) (49 7031) 142253 Exchange Pr ogram HP off ers remanuf actured assemblies f or some par ts. These are identified in Chapter 8 and can be ordered through Ser vice Materials Organization (SMO) or Su[...]

Parts and Supplies 2-7 HP Suppor t Assistant Compact Disc This suppor t tool offers a comprehensiv e online information system designed to provide technical and product inf or mation on HP products. T o subscribe to the quar ter ly ser vice in the U .S . or Canada, call (800) 457-1762. In Hong K ong, Indonesia, Mala ysia, or Singapore, call Mentor [...]

2-8 Service Approach Europe, Middle East, and Africa A ustria 0660-8218 Belgium Dutch 0800 1 1906 F rench 0800 1 7043 Denmark 800-10453 European International +31 20 681 5792 Finland 9800-13134 F rance 0800-9050900 Ger many 0130-810061 Hungar y 36 1 461-8222 Italy 1678-59020 Netherlands 0800-0222420 Norwa y 800-11319 P or tugal 05 05 313342 Spain 9[...]

Parts and Supplies 2-9 T oner Car tridg e Inf ormation The T oner Car tridge is designed to simplify replacement of the major “consumable” parts. The T oner Car tridge contains the printing mechanism and a supply of T oner . At 5% page cov erage, a T oner Car tridge will print approximately 6,000 or 10,000 pages (depending on the model installe[...]

2-10 Service Approach W arranty Statement The warr anty for this product giv es you specific legal rights. There ma y also be other rights that vary from area to area. Refer to the user’ s documentation for the full w arranty and suppor ting warranty inf or mation.[...]

Overview 3-1 3 Pr inter Operation Overview This chapter discusses the f ollowing: ● Using the Control P anel ● Control P anel Menus ● Ser vice Mode ● T esting the Pr inter ● Resetting the Printer ● System Configuration ● Printer I/O Configuration[...]

3-2 Printer Operation Using the Contr ol P anel Contr ol P anel Lay out The printer’ s Control P anel consists of the f ollowing: Figure 3-1 Control P anel La yout Contr ol P anel Lights Ready Data Attention Menu Item – V alue + Select Go Cancel Job 2-line displa y READY 4050 only T able 3-1. Control P anel Lights Light Indication Ready The pri[...]

Using the Control Panel 3-3 Contr ol P anel Ke ys T able 3-2. Control P anel Ke ys Ke y Function [Go] ● Places the printer either online or offline. ● Prints any data residing in the printer’ s buff er . ● Allows the printer to resume printing after being offline. Clears most printer messages and places the pr inter online. ● Allows the p[...]

3-4 Printer Operation Settings and Defaults The printer makes most printing decisions based on either temporar y settings or permanent defaults. Note Settings sent from software applications o verride printer defaults . Setting the display langua ge 1 Press and hold [Select] while tur ning on the printer . Hold [Select] until SELECT LANGUAGE appear[...]

Control Panel Menus 3-5 Contr ol P anel Menus Press [Men u] f or access to all Control P anel menus. When additional tra ys or other accessories are installed in the printer , ne w menu items automatically appear . T o change a Control P anel setting: 1 Press [Menu] until the desired men u appears. 2 Press [Item] until the desired item appears. 3 P[...]

3-6 Printer Operation Quic k Copy Jobs Men u This menu pro vides a list of the quick cop y jobs stored on the printer’ s hard disk. The user can print or delete these jobs from the Control P anel. Note If there are no quick cop y jobs stored on the pr inter’ s hard disk, this menu is not displa yed on the Control P anel. T able 3-4. Quick Copy [...]

Control Panel Menus 3-7 Priv ate/Stored Jobs Menu This menu provides a list of the priv ate and stored jobs on the printer’ s hard disk. The user can print or delete these jobs from the Control P anel. Note If there are no private or stored jobs on the printer’ s hard disk, this menu is not displa yed on the Control P anel. T able 3-5. Private/[...]

3-8 Printer Operation Inf ormation Menu This menu contains printer inf or mation pages that give details about the printer and its configuration. T o pr int an inf orm ation page, scroll to the desired page and press [Select] . T able 3-6. Information Menu Item Explanation PRINT MENU MAP The menu map shows the la yout and current settings of the Co[...]

Control Panel Menus 3-9 P aper Handling Menu When paper handling settings are correctly configured through the Control P anel, you can print by choosing the type and size of paper from the printer dr iv er or software application. Some items in this menu (such as duple x and manual f eed) can be accessed from a software application, or from the pri[...]

3-10 Printer Operation TRAY 1 TYPE= PLAIN For supported paper types see page 1-12. This item appears only when TRAY 1 MODE= CASSETTE . Set the value to correspond with the paper type currently loaded in T ra y 1. TRAY 2 TYPE= PLAIN For supported paper types see page 1-12. Set the value to correspond with the paper type currently loaded in T ra y 2.[...]

Control Panel Menus 3-11 OVERRIDE A4/ LETTER=NO NO YES Choose YES to print on letter size paper when an A4 job is sent, but no A4 size paper is loaded in the printer (or to print on A4 size paper when a letter job is sent, but no letter paper is loaded in the printer). CONFIGURE FUSER MODE MENU=NO NO YES Configure the Fuser mode associated with eac[...]

3-12 Printer Operation Print Quality Menu Some items in this menu can be accessed from a software application, or from the printer dr iv er (if the appropr iate driver is installed). Printer dr iv er and software application settings ov err ide Control P anel settings. T able 3-8. Print Quality Menu Item V alues Explanation RESOLUTION= FASTRES 120 [...]

Control Panel Menus 3-13 RET=MEDIUM OFF LIGHT MEDIUM DARK Use the printer’ s Resolution Enhancement technolog y (REt) setting to produce print with smooth angles, curves, and edges. REt does not aff ect print quality when the print resolution is set to ProRes 1200. All other pr int resolutions, including F astRes 1200, benefit from REt. Note It i[...]

3-14 Printer Operation TONER DENSITY=3 1 2 3 4 5 Lighten or darken the print on the page by changing the T oner density setting. The settings range from 1 (light) to 5 (dark), but the def ault setting of 3 usually produces the best results. Use a lower T oner density setting to sav e T oner . Note It is best to change the T oner density from the pr[...]

Control Panel Menus 3-15 Printing Menu Some items in this menu can be accessed from a software application, or from the printer dr iv er (if the appropriate dr iver is installed). Printer dr iv er and software application settings ov err ide Control P anel settings. T able 3-9. Printing Menu Item V alues Explanation COPIES=1 1 TO 9 99 Set the def a[...]

3-16 Printer Operation UNIT OF MEASURE= INCHES (110V printers) or MILLIMETERS (220V printers) INCHES MILLIMETERS This item appears only when CONFIGURE CUSTOM PAPER=YES . Select the unit of measurement f or the custom paper size. X DIMENSION= 8.5 INCHES (110V printers) or 216 MILLIMETERS (220V printers) 3.0 0 TO 8.5 INCHES (110V printers) or 76 to 2[...]

Control Panel Menus 3-17 PCL FONT SOURCE=INTERNAL INTERNAL SOFT SLOT 1, 2, OR 3 INTERNAL : Inter n al f onts. SOFT : P er manent soft f onts. SLOT 1 , 2 , or 3 : F onts stored in one of the three DIMM slots. Note It is best to set the f ont source from the printer driver or software application. (Driver and software settings ov err ide Control P an[...]

3-18 Printer Operation PCL SYMB OL SET=PC- 8 PC- 8 many others Select any one of se ver al av ailable symbol sets from the printer’ s Control P anel. A symbol set is a unique grouping of all the characters in a f ont. PC-8 or PC-850 is recommended f or line draw characters. Note It is best to set the symbol set from the printer dr iv er or softwa[...]

Control Panel Menus 3-19 APPEND CR TO LF= NO NO YES Select YES to append a carriage retur n to each line f eed encountered in backw ard-compatible PCL jobs (pure te xt, no job control). Some environments , such as UNIX, indicate a new line using only the line f eed control code. This option allows the user to append the required carriage return to [...]

3-20 Printer Operation Configuration Menu Items in this menu aff ect the pr inter’ s behavior . Configure the pr inter according to your printing needs. T able 3-10. Configuration Menu Item V alues Explanation POWERSAVE= 30 MINUTES OFF 15 MINUTES 30 MINUTES 1 HOUR 2 HOURS 3 HOURS Set the printer to enter P owerSa ve after it has been idle f or a [...]

Control Panel Menus 3-21 RESOURCE SAVE= OFF OFF ON AUTO Dedicate printer memor y to sav e each language’ s per manent resources. (Y ou might need to add memor y to the printer in order f or this item to appear .) The amount of memor y set aside can be diff erent for each installed language. Some languages might hav e memory set aside for resource[...]

3-22 Printer Operation PAGE PROTECT= AUTO AUTO ON This item appears only after a 21 PAGE TOO COMPLEX, PRESS GO TO CONTINUE message displays . Memor y Enhancement technolog y (MEt) attempts to guarantee that all pages will print. If the page does not print, tur n PAGE PROTECT to ON . This might increase chances of a 20 INSUFFICIENT MEMORY, PRESS GO [...]

Control Panel Menus 3-23 TONER LOW=CONTINUE CONTINUE STOP Determine how the printer behaves when T oner is low . The TONER LOW message will first appear when the T oner Car tridge is almost out of T oner . (About 100 to 300 sheets can still be printed.) CONTINUE : The printer will continue to print while the TONER LOW message is displa yed. STOP : [...]

3-24 Printer Operation J AM RECOVERY= AUTO AUTO ON OFF Determine how the printer behaves when a paper jam occurs. AUTO : The printer automatically selects the best mode f or printer jam recovery (usually AUTO ). This is the default setting. ON : The printer automatically repr ints pages after a paper jam is cleared. OFF : The printer does not repr [...]

Control Panel Menus 3-25 QUICK COPY JO BS = 3 2 (HP LaserJet 4050 series printer with hard disk installed only) 1 to 50 Specifies the number of quick cop y jobs that can be stored on the printer’ s hard disk. HELD JOB TIMEOUT = OFF (HP LaserJet 4050 series printer with hard disk installed only) 1 HOUR 4 HOURS 1 DAY 1 WEEK This setting allows the [...]

3-26 Printer Operation I/O Menu Items in the I/O (input/output) Menu aff ect the communication between the printer and the computer . T able 3-11. I/O Menu Item V alues Explanation I/O TIMEOUT=15 5 to 30 0 Select the I/O timeout per iod in seconds. (I/O timeout ref ers to the time, measured in seconds, that the printer waits before ending a print j[...]

Control Panel Menus 3-27 PARALLEL HIGH SPEED=YES YES NO Select the speed at which data is transmitted to the printer . YES : The printer accepts faster parallel communications used f or connections with new er computers. NO : The printer accepts slower parallel communications used f or connections with older computers. PARALLEL ADV FUNCTIONS=ON ON [...]

3-28 Printer Operation SERIAL ROBUST XON=ON ON OFF This item appears only when SERIAL PACING=XON/XOFF . Select the method f or generating XONs. ON : The printer sends an XON when the pr inter is online and when sufficient buff er space is av ailable . If the host does not receive data within appro ximately one second, the printer will transmit addi[...]

Control Panel Menus 3-29 EIO Menu (Netw orked Printers) EIO (enhanced input/output) Menus depend on the par ticular accessor y product installed in an EIO slot of the printer . If the printer contains an HP JetDirect print ser ver EIO card, y ou can configure basic networking parameters using the EIO Menu. These and other parameters can also be con[...]

3-30 Printer Operation CFG TCP/IP=NO NO YES NO : The TCP/IP Menu is not accessible . YES : The TCP/IP Menu appears. In the TCP/IP Menu, y ou can specify BOOTP=YES f or TCP/IP parameters to be automatically loaded from a bootp or DHCP ser v er when the printer is tur ned on. If you specify B OOTP=NO , y ou can manually set selected TCP/IP parameters[...]

Control Panel Menus 3-31 Resets Menu Use this menu with caution. Y ou can lose b uff ered page data or printer configuration settings when you select these items . Only reset the printer under the follo wing circumstances: ● Y ou want to restore the printer’ s default settings . ● Communication between the printer and computer has been interr[...]

3-32 Printer Operation Service Mode Ser vice Mode should be used only by authorized service personnel. While in Ser vice Mode, y ou can: ● V er ify and set the page count and serial number . These are displa yed on the Configuration P age. ● Set the Cold Reset Def ault. (This sets the factory default paper size to either Letter or A4). ● T ur[...]

Service Mode 3-33 Service Menu Figure 3-2 Ser vice Menu Setting the P age Count, Maintenance Count, and Serial Number The page count and printer ser ial number are stored in non-v olatile memor y . If it is necessar y to replace the F or matter PCA, the page count should be set to the current value to reflect the age of the Print Engine. The proced[...]

3-34 Printer Operation P age Count The page count stored in NVRAM and displa yed on the Configur ation P age printout represents the number of pages which the printer has printed (excluding engine test prints). If it becomes necessar y to repair a printer by installing a new F or matter , the page count must be reset so that it represents the age o[...]

Service Mode 3-35 Maintenance P age Count The maintenance page count should be reset only after a maintenance kit has been installed. This will reset the maintenance counter so that the message PERFORM PRINTER MAINTENANCE will displa y another 200,000 pages later (def ault). ● Hold down the [– Item] and [ – V alue] keys. ● T ur n the printe[...]

3-36 Printer Operation MAINTENANCE COUNT in the Ser vice Mode Menu sets the page count inter v al at which the next service is due for the printer . This is set initially at the f actor y to 200,000 pages. (F or example, the message displa ys at 200,000 pages. If the Printer Maintenance Kit is installed at 200,114 pages, the message displa ys 200,0[...]

Testing the Printer 3-37 T esting the Printer When you print a Configuration P age, the printer checks its internal controller and I/O interf ace, and then prints a test page. Y ou can re view the Configuration P age printout to verify proper installation of such options as paper tra ys or printer languages. F or more inf or mation, see page 7-52. [...]

3-38 Printer Operation Resetting the Printer Cold Reset Cold reset clears all data from the printer memor y and sets all the def aults back to the f actor y settings. CA UTION P erforming a Cold Reset resets the HP JetDirect configuration. T o a void making changes to your configur ation, remov e the HP JetDirect card bef ore perf or ming a cold re[...]

System Configuration 3-39 System Configuration MS-DOS System Configuration T o communicate properly with the pr inter , the MS-DOS environment requires the addition or modification of MODE commands in the A UTOEXEC .BA T file. Add or modify the MODE command(s), depending on the interf ace configuration, as f ollows: P arallel DOS Commands Most IBM [...]

3-40 Printer Operation Serial MS-DOS Commands Most IBM compatible computers def ault to a parallel printer por t. T o ensure that inf or mation is sent to the serial pr inter por t, type the f ollowing MS-DOS commands at the MS-DOS prompt, or include them in the A UTOEXEC .BA T file. MODE COM1: 9600, N, 8, 1, P MODE LPT1: =COM1 F or MS-DOS version [...]

Printer I/O Configuration 3-41 Printer I/O Configuration P arallel Menu The def ault setting f or the HIGH SPEED PARALLEL I/O is YES . If it is set to NO , the interf ace runs at a slower speed that is compatible with older computers. When the def ault is set to YES , the parallel interf ace runs at a higher rate suppor ted by ne wer computers. Adv[...]

3-42 Printer Operation P acing (Handshaking) P acing (or “handshaking”) is a type of communication between the printer and the computer . This is an impor tant setting in the printer because it allows the printer to tell the computer when to send inf or mation. If the printer is unable to receiv e information, f or e xample, when the print buff[...]

Overview 4-1 4 Pr inter Maintenance Overview This chapter discusses the f ollowing: ● Cleaning the Printer and Accessor ies ● Pre ventativ e Maintenance[...]

4-2 Printer Maintenance Cleaning the Printer and Accessories T o maintain high pr int quality and perf or mance, thoroughly clean the printer and the paper handling accessor ies: ● Every time you change the T oner Car tridge (r un a cleaning page). ● After printing approximately 10,000 pages . ● Whene ver print quality problems occur . Clean [...]

Cleaning the Printer and Accessories 4-3 T able 4-1. Cleaning the Printer Component Cleaning Method / Notes Outside Cov ers Use a water-dampened cloth. Do not use solv ents or ammonia-based cleaners. Inside General With a dr y lint-free cloth, wipe any dust, spilled T oner , and paper par ticles from the paper path area, the Registration Roller , a[...]

4-4 Printer Maintenance Using the Printer Cleaning P age If T oner specks appear on the front or bac k side of your print jobs, f ollow the procedure below . F rom the pr inter’ s Control Panel, do the f ollowing: 1 Press [Menu] until PRINT QUALITY MENU appears . 2 Press [Item] until CREATE CLEANING PAGE appears. 3 Press [Select] to create the cl[...]

Preventative Maintenance 4-5 Preventative Maintenance The pre ventativ e maintenance cycle for this printer is ev er y 200,000 pages. T o order the maintenance kit see page 8-2. The kit contains the f ollowing replacement par ts: ● One Fuser ● One T ransfer Roller ● One T ray 1 Roller ● Three F eed Rollers ● Three Separation Rollers Ref e[...]

4-6 Printer Maintenance Expected Life of Components The f ollowing tab le shows the e xpected lif e of cer tain components in the printer . T o order par ts, see Chapter 8. T able 4-2. Life of Components for the HP LaserJet 4000 and 4050 Series Printer No. P ar t name Part No. Quantity Expected Life 1 T ra y 1 Pick up Roller RG5-3718-000CN 1 100,00[...]

Overview 5-1 5 Functional Inf or m ation Overview This chapter presents a generalized functional o v er view of the printer and the printing processes. This chapter discusses the f ollowing printer systems: ● P ower Supply System ● Engine Controller System ● F or matter System ● Image F or mation System ● P aper F eed System ● Basic Seq[...]

5-2 Functional Information P ower Suppl y System A C/DC P ower Distrib ution A C power is supplied to the lo w-voltage po wer supply circuit in the Engine Controller Board when the power s witch (SW1) is tur ned on. The low-v oltage power supply circuit supplies +24 VDC and +3.3 VDC required f or the printer . +24 VDC is supplied to drive the main [...]

Power Supply System 5-3 Over current Overvolta ge Protection The Fusing Heater Saf ety Circuit is located on the Engine Controller Board, and constantly monitors the fusing temperature. In case of abnor mality , the output from this circuit turns off the relay (RL101) and interrupts the power to the fusing heater . If an increase in the temperature[...]

5-4 Functional Information High-v oltage P ower Distrib ution Figure 5-2 Engine Controller Board In response to the instructions from the microprocessor (CPU:IC 501) on the Engine Controller Board, this circuit applies the superimposed v oltage of DC voltage and A C voltage to the primar y charging roller and De v eloping Cylinder , and a positive [...]

Power Supply System 5-5 T oner Car tridg e Detection The T oner Car tridge has a T oner sensor . The circuit compares the output value of the de veloping A C bias and the output value from the antenna inside the Car tridge, and outputs the T oner detection signal. The CPU detects the remaining T oner lev e l and the presence of the Car tridge when [...]

5-6 Functional Information Engine Contr oller System The f ollowing systems and functions are controlled b y the engine controller board: ● DC pow er distr ibution (+3.3V DC , +5V DC, +24V A) ● Laser and scanner drive ● P aper motion monitoring and control (photosensors and flags) ● Clutches (tra y pickup and T ra y 1 feed) ● Engine T est[...]

Engine Controller System 5-7 Figure 5-3 Engine Controller Board[...]

5-8 Functional Information Engine Contr oller Board Inputs and Outputs Figure 5-4 Engine Controller Board I/O (1 of 4)[...]

Engine Controller System 5-9 Figure 5-5 Engine Controller Board I/O (2 of 4)[...]

5-10 Functional Information Figure 5-6 Engine Controller Board I/O (3 of 4)[...]

Engine Controller System 5-11 Figure 5-7 Engine Controller Board I/O (4 of 4)[...]

5-12 Functional Information Laser and Scanner Drive Based on inf or mation receiv ed from the Formatter , the Engine Controller Board sends signals to the Laser Scanner Assembly to modulate the Laser Diode on and off and to drive the Laser Scanner motor . See “Image Formation System” on page 5-22 for more inf or mation. P aper Motion Monitoring[...]

Engine Controller System 5-13 Motors See “Timing Diagram” on page 5-50 f or specific timing details for the printer motors. The Main Motor , MT1, is controlled by the Engine Controller Board. The Main Motor drives the Main Gear Assemb ly and rotates during the initial rotation period (follo wing power-on), the print period, the last rotation pe[...]

5-14 Functional Information The Scanner Motor is controlled and monitored by the Engine Controller Board. It rotates the Scanner Mirror during the initial rotation period and the pr int period. The F an Motor is controlled and monitored by the Engine Controller Board. The f an operates at full speed during the printing modes. The F an tur ns off in[...]

Formatter System 5-15 Formatter System The F or matter PCA is responsible f or the follo wing: ● Controlling the P owerSa ve mode ● Receiving and processing print data from the various printer interf aces ● Monitoring Control Panel inputs and rela ying pr inter status inf or mation (through the Control P anel and the bidirectional I/O) ● De[...]

5-16 Functional Information Note Printer error messages ov err ide the P o werSav e message. The printer will enter P owerSa ve mode at the appropriate time, b ut the error message will continue to be displa yed. Resolution Enhancement technolog y (REt) The F or matter PCA contains circuitr y f or Resolution Enhancement technolog y (REt), which mod[...]

Formatter System 5-17 Input/Output P arallel Interface The F or matter PCA receiv es incoming data through its Bidirectional Interf ace (IEEE 1284). The I/O provides high speed and two w ay communication between the printer and the host, allowing the user to change printer settings and monitor pr inter status from the host computer . The user ma y [...]

5-18 Functional Information Disk The disk accessor y is mounted on the rear of the F or matter PCA. The optional greater than 1 GB EIO-based hard drive is used f or creating multiple original prints (mopies) and stor ing f or ms, f onts, and signatures. Local T alk I/O The printer implements AppleT alk networking protocol through LocalT alk hardwar[...]

Formatter System 5-19 Random Access Memory (RAM) The RAM contains the page and I/O buff ers and the f ont storage area. It stores printing and font inf or mation received from the host system, and can also ser v e to temporarily store a full page of print image data bef ore the data is sent to the print engine (see “P age Protect” belo w). RAM [...]

5-20 Functional Information P age Protect P age comple xity (rules, comple x graphics, or dense te xt) may e xceed the printer’ s ability to create the page image f ast enough to keep pace with the image f or mation process. If P age Protect is disabled, and a page is too comple x, it ma y pr int in par ts (for e xample, the top half on one page [...]

Formatter System 5-21 PML PML is a Printer Management Language that allows remote configuration and status readbac k through the I/O por ts. Contr ol P anel The F or matter PCA sends and receives printer status and command data via a Control P anel PCA. See “Using the Control P anel” on page 3-2, and “Printer Messages” on page 7-17 for more[...]

5-22 Functional Information Image Formation System The image f or mation system is the main system in the printer . It consists of six stages: When the F or matter Board sends the print signal to the Engine Controller Board, it drives the Main Motor to rotate the Photosensitiv e Drum, the Dev eloping Cylinder , the Primar y Charging Roller , and th[...]

Image Formation System 5-23 Figure 5-9 Image F or mation System After the image has been transf erred to the paper , it is then fused onto the paper by heat and pressure at the Fuser .[...]

5-24 Functional Information T oner Car tridg e Figure 5-10 T oner Car tr idge A major por tion of the Image Formation System is contained in the Car tridge as shown in the figure abov e. The T oner Car tr idge is the “hear t” of the Image Formation System. It houses the cleaning, conditioning, and de veloping steps of the process. The T oner Ca[...]

Image Formation System 5-25 Photosensitive Drum The special proper ties of the Photosensitive Drum allow an image to be f or med on the Drum surface and then tr ansferred to paper . The Drum is an aluminum cylinder . The outside of the cylinder is coated with a la yer of organic-photoconductiv e material (OPC) which is non-to xic. The OPC material [...]

5-26 Functional Information Cleaning the Drum The cleaning blade is in contact with the surf ace of the Dr um at all times. As the Drum rotates during pr inting, e xcess T oner is stored in the waste T oner receptacle. Figure 5-12 Cleaning the Drum[...]

Image Formation System 5-27 Conditioning the Drum After the Drum is cleaned, it must be conditioned. This process consists of applying a unif or m negativ e charge on the surface of the Drum with the Pr imar y Charging Roller . The Pr imar y Charging Roller is coated with conductive rubber with an A C bias applied to er ase any residual charges and[...]

5-28 Functional Information Writing the Image During the wr iting process, a modulated Laser Diode projects the beam onto the rotating six-sided Scanning Mirror . As the mirror rotates, the beam reflects off the mirror , through a set of f ocusing lenses, through a slot in the rear of the T oner Car tridge, and onto the Photosensitive Drum. The bea[...]

Image Formation System 5-29 Developing the Ima ge The de v eloping process de velops the latent electrostatic image into a visible image on the Drum. The De v eloping Unit consists of a metallic cylinder that rotates around a fix ed magnetic core inside the T oner cavity . T oner is a powdery substance made of blac k plastic resin bound to iron par[...]

5-30 Functional Information T ransferring the Image During the transf erring process the T oner image on the Dr um surf ace is transf erred to the paper . A positive charge applied to the bac k of the paper by the tr ansfer roller causes the negativ ely charged T oner on the Drum surface to be attr acted to the page. The small diameter of the Drum,[...]

Image Formation System 5-31 Image Fusing/V ariable Fusing T emperature During the fusing process, the T oner is fused into the paper by heat and pressure to produce a permanent image. The paper passes between a heated Fusing Roller and a soft Pressure Roller . This melts the T oner and presses it into the paper . The Fusing Roller contains a cerami[...]

5-32 Functional Information V ariable Fusing T emperature Figure 5-18 Fusing T emperature Control V ariable fusing temperature is a f eature that gives the user or service technician the ability to adjust the fusing temperature based on the media being used in the printer . The def ault mode is nor mal and should be optimal f or most users. There i[...]

Paper Feed System 5-33 P aper Feed System Figure 5-19 P aper Feed Subsystem[...]

5-34 Functional Information Figure 5-20 P aper P ath The presence of paper in T ray 1 is detected by the T ra y 1 P aper Sensor (PS105). Presence of paper in T ra y 2 is detected by the T ra y 2 P aper Sensor (PS101) f or the HP LaserJet 4000, 4000 N, 4050 and 4050 N; and by the Upper T ra y P aper Sensor (PS101) or the Lower T ra y P aper Sensor ([...]

Paper Feed System 5-35 and by the six s witches (SW600, 601, 602, 603, 604, 605) on the P aper Size Detection PCA f or the HP LaserJet 4000 T , 4000 TN, 4050 T , and 4050 TN. While the Main Motor rotates, the T ra y 1 Pic kup Solenoid (SL102) is turned on, the T ra y 1 Pickup Roller rotates , and a sheet of paper is f ed into the printer . The pape[...]

5-36 Functional Information Printing fr om T ra y 1 The presence of paper in T ray 1 is detected by the T ra y 1 P aper Sensor (PS105). When the Engine Controller Board receiv es the /PRNT signal from the F or matter , the pr inter star ts the initial rotation phase. (This consists of Main Motor warm-up, Scanner Motor w arm -up , high-v oltage cont[...]

Paper Feed System 5-37 Figure 5-22 T ra y 1 Pick up[...]

5-38 Functional Information Printing fr om T ra y 2 When the F or matter inputs the /PRNT signal to the printer , the Main Motor (M1) star ts rotation. When the Main Motor reaches its prescribed speed, the Feed Roller Clutch (CL101) and T ra y 2 Pic kup Solenoid (SL 101 or SL 103) are turn ed on. (The T ra y 2 Pick up Roller , T ra y 2 F eed Roller[...]

Paper Feed System 5-39 Figure 5-24 T ra y 2 Pick up[...]

5-40 Functional Information Multi-Feed Prevention Mec hanism When f eeding paper from T ray 2, the printer uses the Separation Roller to pre vent m ulti-feeding. Normally , the Separation Roller is impar ted with a rotational force in the same direction as the F eed Roller . Howe v er , since the Separation Roller is equipped with a T orque Limiter[...]

Paper Feed System 5-41 Printing fr om the Optional 500-sheet Universal T ray The operation sequences of the P aper Feeder are controlled b y the P aper F eeder Driver . A 4-bit microprocessor is used in the P aper F eeder Driver , which controls the sequences of the P aper F eeder and the serial communication with the Engine Controller Board. The E[...]

5-42 Functional Information Pickup and Feeding The P aper F eeder picks up the paper from the installed tr ays and f eeds the paper to the printer . The flow of the paper is sho wn below . Figure 5-27 P aper F eed from T rays The paper size and the presence of the 500-sheet T ra y are detected by three s witches (SW801, 802, 803) on the Paper F eed[...]

Paper Feed System 5-43 The CPU on the Engine Controller Board monitors the conditions of the PS102 f or a prescribed per iod of time after the pick up star ts. If the PS102 does not detect paper within that time inter v al, the CPU tur ns off the F eed Roller clutch (CL101) to stop the paper after the top of page sensor (PS103) detects the presence[...]

5-44 Functional Information En velope Feeder The operation sequences of the En velope F eeder are controlled by the Env elope Feeder Driver . A 4-bit microprocessor is used in the Env elope Feeder Driver , which controls the sequences of the Env elope Feeder and the serial communication with the Engine Controller Board of the printer . The Engine C[...]

Paper Feed System 5-45 is completed, the Env elope Feeder Driver PCA receiv es the pick up command from the Engine Controller Board and tur ns on the env elope pickup solenoid (SL901). The Pick up Roller , Feed Roller and Separation Roller are rotated sequentially by the Main Motor rotation, and an en v elope is pick ed up. Then, any unnecessary en[...]

5-46 Functional Information Duplex er The operation sequences of the Duple x er are controlled by the Duple xer Driv er . A 4-bit microprocessor is used in the Duplex er Driver , which controls the sequences of the Duple xer and the serial communication with the Engine Controller Board. The Duple xer Driv er drives the Solenoid, Motors, and F an ac[...]

Paper Feed System 5-47 Figure 5-31 P aper Path f or the Duplex er[...]

5-48 Functional Information Figure 5-32 P aper F eed f or the Duplex er P aper Jam There are f our photointerrupters (PS102, PS103, PS106, PS501) in the paper path f or detecting the presence of the paper . If the paper does not reach or pass three sensors within the prescribed time, the microprocessor in the Engine Controller Board notifies the F [...]

Basic Sequence of Operation 5-49 Basic Sequence of Operation The F or matter PCA and the Engine Controller Board share inf or mation during pr inter operation. The Interf ace PCA forms a link which operates as a serial data bus . This allows printer status, command, and dot-image data to be passed between the two PCAs . T able 5-1 shows the gener a[...]

5-50 Functional Information Figure 5-33 Timing Diagram[...]

Overview 6-1 6 Remo ving and Replacing P ar ts Overview This chapter discusses the f ollowing: ● Remov al and Replacement Strateg y ● Removing Co vers ● Removing Assemb lies ● Separating the Engine Module from the P aper Feed Module[...]

6-2 Removing and Replacing Parts Remo v al and Replacement Strategy This chapter describes the complete disassembly of the printer . In e very instance, tasks that must be perf ormed before beginning the procedure are listed first. Remov e the assemblies in the order listed to pre vent damage during re-assembly . T o ensure optimum print quality , [...]

Removal and Replacement Strategy 6-3 T ools ● Phillips #2 magnetized scre wdriver with 6-inch shaft ● Flat-blade scre wdriver with 6-inch shaft ● Needle-nose pliers ● P enlight Screws Used in the Printer All screws used in the printer are Phillips head, which require a Phillips screwdriv er . The following figure sho ws the diff erence betw[...]

6-4 Removing and Replacing Parts T able 6-1. Screws Used in the Printer Drawing and Description Purpose Threaded Phillips with captive star w asher Used to f asten metal to metal when good electrical contact is needed. Silver Self-tapping Phillips scre w Used to f asten metal or plastic to plastic mainframes . Black Self-tapping Phillips scre w Use[...]

Removal and Replacement Strategy 6-5 Hint T o inser t self-tapping screws, turn the screw to the left (counter-clockwise) until it clic ks, then turn it to the right (clockwise) until it is seated. If a self-tapping screw-hole strips, y ou must repair the screw-hole or replace the aff ected assembly . Long screw (4.8 in/116 mm) Used to anchor T ray[...]

6-6 Removing and Replacing Parts Remo ving Co vers It is usually best to remov e and replace the cov ers in the order shown. T ur n the printer off and unplug the power cord and any cab les. Hint Left and right are indicated as you f ace the front of the printer unless otherwise noted. Rear Right Side Co ver Figure 6-2 Removing the Rear Right Side [...]

Removing Covers 6-7 T op Cover Open the T op Cov er and remov e the T oner Car tridge. CA UTION T o pre v ent damage to the T oner Car tr idge, do not e xpose it to light f or more than a f ew minutes . T o remove the T op Cov er , you must remo v e the Rear Right Side Cov er (page 6-6), the T oner Car tr idge Drive Arm (page 6-9), the Control P an[...]

6-8 Removing and Replacing Parts Contro l P anel Figure 6-4 Removing the Control P anel 1 Using a flat-blade scre wdr iver , pr y each side of the Control P anel upward. 2 Remov e the top of the Control Panel from the tab . 3 Disconnect the ribbon cable from the Control P anel. Ta b[...]

Removing Covers 6-9 T oner Cartridg e Drive Arm Figure 6-5 Removing the T oner Car tridge Dr ive Arm 1 Remov e the T oner Car tridge Drive Arm by using needle-nose pliers to pinch the pin from its hinge on the T op Cover . Note Be sure to reconnect the T oner Car tr idge Drive Arm when you replace the T op Cov er , or the T oner Car tr idge will no[...]

6-10 Removing and Replacing Parts Figure 6-6 Removing the T op Cov er 2 Remov e the four screws holding the T op Cov er (two are behind the Rear Output Bin, near the top , and two are on top of the printer under the T op Cov er). T op screws Rear screws T oner car tr idge drive arm[...]

Removing Covers 6-11 Figure 6-7 Releasing tabs to lift the T op Cov er 3 Squeeze the right front side of the T op Cover to remo ve it. It ma y be necessar y to use a small flat-blade scre wdr iver to release the tab inside the small hole. 4 Holding the output assembly in place (located to ward the rear of the printer), remov e the T op Cover . Rele[...]

6-12 Removing and Replacing Parts Left Side Co ver Figure 6-8 Removing the Left Side Co ver 1 Open T ra y 1. 2 Release the latch on the left side cov er from the inside of the printer . Release the catches on the front side of the cov er . 3 Lift the cov er upward to release the front top side of the co ver , then pull the cov e r aw a y from the p[...]

Removing Covers 6-13 Fr ont Right Side Cover Figure 6-9 Removing the F ront Right Side Cov er 1 Release the latch at the top center of the cov e r . 2 Lift the cov e r straight up until it is free of the tabs at the bottom and the power s witch rod, then pull it awa y from the pr inter . Hint When you reinstall the F ront Right Side Cov er , be sur[...]

6-14 Removing and Replacing Parts Rear Co ver/Rear Output Bin Figure 6-10 Removing the Rear Co ver/Rear Output Bin 1 F acing the rear of the pr inter , pinch the r ight side of the Rear Output Bin and release the hinge from the slot. 2 Rotate the bin upward and slide it to the right to release the left hinge. Step 1 Step 2[...]

Removing Covers 6-15 Tr a y 1 Figure 6-11 Removing T ra y 1 from the Front Co v er 1 Open T ra y 1. 2 Push outward on the two slot hinges to release the pins on T ra y 1. 3 Slide the F ront Cover to the right and remov e it from the three hinges on the bottom.[...]

6-16 Removing and Replacing Parts Figure 6-12 Removing the T ra y 1 Sensor Arm Cover 4 Firmly pull both sides of the T ra y 1 Sensor Arm Cov er to w ard y ou until it releases from the shaft. See Figure 6-13, “Detail of the T ray 1 Sensor Ar m Cov er ,” on page 6-17. 5 Rotate T ray 1 downward and remo ve it from the tw o hinges.[...]

Removing Covers 6-17 Figure 6-13 Detail of the T ra y 1 Sensor Ar m Cover Hint When you reinstall the T ra y 1 Sensor Ar m Cov er be sure the Sensor Arms move freely .[...]

6-18 Removing and Replacing Parts Remo ving Assemblies The order in which you replace the f ollowing assemblies depends on the par t needing to be replaced. It is not necessar y to remov e ev er y assembly . Fuser W ARNING! Let the Fuser Assembly cool bef ore disassembly . 1 Remov e the Rear Cover/Rear Output Bin (page 6-14). Figure 6-14 Removing t[...]

Removing Assemblies 6-19 Figure 6-15 Loosening the captiv e screws in the Fuser Assemb ly 3 Loosen the two captiv e screws on the Fuser Assemb ly . 4 Pull the Fuser Assembly str aight out of the printer .[...]

6-20 Removing and Replacing Parts Formatter Cage Assembl y Figure 6-16 Removing the F or matter Cage Assembly 1 Print a Configuration P age. The inf or mation is necessar y to reconfigure the printer after you replace the F orm atter . 2 Remov e the rear right side cov er (page 6-6). The F ormatter Cage Assembly is directly underneath. 3 Remov e th[...]

Removing Assemblies 6-21 Output Assembl y Figure 6-17 Removing the Output Assemb ly 1 Remov e the T op Cover (page 6-7). The Output Assemb ly is on the top , rear of the printer . Brass arm White tab[...]

6-22 Removing and Replacing Parts 2 F acing the rear of the pr inter , release the 2 latches as follo ws: Figure 6-18 Left end of Output Assembly (br ass ar m) a On the left end of the assembly , rotate the brass ar m up 90 ° . Figure 6-19 Right end of Output Assembly (white tab) b On the right end of the assembly , release the white tab . 3 Lift [...]

Removing Assemblies 6-23 Laser Scanner Figure 6-20 Removing the Laser Scanner 1 Remov e the T op Cover (page 6-7). The Laser Scanner is on the top of the printer , tilted tow ard the rear , and has a yellow label on it. 2 Unplug the 3 connectors as shown. 3 Remov e the 4 blac k screws around the edges of the Laser Scanner . Do not remo v e the two [...]

6-24 Removing and Replacing Parts Fa n Figure 6-21 Removing the F an 1 Remov e the T op Cov er (page 6-7) and the Left Side Cov er (page 6-12). The F an is on the left side of the pr inter . 2 Unplug the F an’ s connector to the Engine Controller Board. 3 Squeeze the latches on the left and right sides of the F an cover . 4 Pull the F an straight[...]

Removing Assemblies 6-25 Main Motor Figure 6-22 Removing the Main Motor 1 Remov e the T op Cover (page 6-7) and the F ront Right Side Cov er (page 6-13). The Main Motor is on the right front side of the printer . 2 Unplug the connector . 3 Remov e the 4 silv er scre ws around the corners of the metal plate. 4 Remov e the Main Motor from the printer[...]

6-26 Removing and Replacing Parts T ransfer Roller Figure 6-23 Removing the T ransf er Roller 1 Open the T op Cover and remo v e the T oner Car tridge. The T ransf er Roller is under neath the T oner Car tr idge. CA UTION Do not touch the black rubber part of the roller . Skin oils on the roller can cause problems with print quality . 2 Using a fla[...]

Removing Assemblies 6-27 T ray 1 Pic kup Roller Figure 6-24 Removing the Pic kup Roller (shown with En velope Entrance Co ver remov ed) 1 Open T ra y 1. The T ra y 1 Pickup Roller is in the center of the T ra y 1 Pickup Assemb ly . 2 Grasp the En velope Entr ance Cov er and pull it straight a wa y from the printer . 3 Pr y open the blue latch on th[...]

6-28 Removing and Replacing Parts Figure 6-25 Detail of the T ray 1 Pickup Roller[...]

Removing Assemblies 6-29 T ray 1 Pic kup Assembl y 1 Remov e the cov ers (star ting on page 6-6): T op Cover , Left Side Cov er , F ront Right Side Cov er , and T ra y 1. The T ray 1 Pic kup Assembly is on the front of the printer . Figure 6-26 Removing the En velope F eeder Gear Cov er 2 Flip down or remo ve the En v elope Feeder Connector Co ver [...]

6-30 Removing and Replacing Parts Figure 6-27 Removing the T ra y 1 Pick up Assembly – Right Side 5 Disconnect the solenoid cable on the right side of the T ra y 1 Pick up Assembly . (Note the way the cab les are routed for replacement.)[...]

Removing Assemblies 6-31 Figure 6-28 Removing the T ra y 1 Pickup Assemb ly – Left Side 6 Unplug the connector to the Engine Controller Board on the left side of the T ray 1 Pickup Assemb ly . 7 Remov e the long screw (4.8 in/116 mm) from the left side of the assembly . 8 Remov e the self-tapping screw sho wn. Step 6 Step 7 Step 8[...]

6-32 Removing and Replacing Parts Figure 6-29 Removing the T ra y 1 Pick up Assembly – F ront Side 9 Remov e the 3 screws shown. 10 Lift the blac k T oner Car tr idge Guide on the right side of the assembly and pull the assemb ly straight out of the printer . See page 6-33 f or the procedure. T oner car tridge guide[...]

Removing Assemblies 6-33 Right Side T oner Car tridg e Guide Y ou can lift aside the Right Side T oner Car tr idge Guide (instead of removing it) to access the Registration Assemb ly . It is not necessar y to unplug the connectors. Remov e the Right Side T oner Car tr idge Guide to access the Gear T rain. F ollow the steps below: 1 Remov e the T op[...]

6-34 Removing and Replacing Parts Registration Assembl y Figure 6-31 Removing the Registration Assemb ly 1 Remov e the following co vers (starting on page 6-6): T op Cov er , Left Side Cov er, F ront Right Side Cov er , and T ra y 1. Remov e the T ray 1 pickup assemb ly (page 6-29). The Right Side T oner Car tridge Guide can be lifted without remov[...]

Removing Assemblies 6-35 Figure 6-32 Detail of screws f or the Registration Assembly CA UTION Do not remove the silv er screw closest to the Registration Assemb ly! It holds the spring in place. T ake out the silv er screw f ar ther from the registration assemb ly , the one that is under the green handle. 3 Lift the green handle. Remo v e the 2 bla[...]

6-36 Removing and Replacing Parts P aper Feed Assembly 1 Remov e the following co vers (starting on page 6-6): T op Cov er , Left Side Cov er, F ront Right Side Cov er , and T ra y 1. Remov e the T ray 1 Pickup Assemb ly (page 6-29). The P aper Feed Assemb ly is on the front of the printer . Figure 6-33 Unplugging the connector to the P aper F eed [...]

Removing Assemblies 6-37 Figure 6-34 Removing the upper scre ws from the P aper F eed Assembly 3 Remov e the 2 blac k upper screws. Hint After replacing the P aper F eed Assembly , make sure to inser t the 2 upper screws only . The 2 lower scre ws are for holding the T ra y 1 Pickup Assembly in place .[...]

6-38 Removing and Replacing Parts Hint F or replacement of the P aper F eed Assembly , orient the clutch properly by inserting it into the slot, as shown. Figure 6-35 Detail of the P aper F eed Clutch[...]

Removing Assemblies 6-39 Formatter P an Figure 6-36 Removing the F or matter P an 1 Remov e the T op Cover (page 6-7) and the F ront Right Side Cov er (page 6-13). Remov e the F or matter Cage Assembly (page 6-20). The F or matter P an is on the right rear side. Remov e the F or matter P an in order to split the engine from the tra y assembly or to[...]

6-40 Removing and Replacing Parts Gear T rain Figure 6-37 Removing the Gear T rain 1 Remov e the following co vers (starting on page 6-6): T op Cov er , F ront Right Side Cover , Rear Cov er/Rear Output Bin, and T ra y 1. Remov e the Right Side T oner Car tr idge Guide (page 6-33), the Registration Assemb ly (page 6-34), the Formatter Cage Assembly[...]

Removing Assemblies 6-41 Delivery Drive Assembly Figure 6-38 Removing the Deliv er y Dr ive Assemb ly 1 Remov e the cov ers (star ting on page 6-6): T op Cover , Left Side Cov er , F ront Right Side Cov er , Rear Cover/Rear Output Bin, and T ra y 1. Remove the Output Assemb ly (page 6-21), F or matter Cage Assembly (page 6-20), F or matter P an (pa[...]

6-42 Removing and Replacing Parts Separating the Engine Module fr om the P aper Feed Module This procedure is the same f or printers with a single 500-sheet T ra y or two 250-sheet T ra ys. 1 Remov e the Rear Right Side cover (page 6-6). Remo ve the F or matter Cage Assembly (page 6-20), F or matter P an (page 6-39), and 2 long screws from the T ra[...]

Separating the Engine Module from the Paper Feed Module 6-43 Figure 6-40 Separating the Engine from the P aper Feed Module 3 Remov e the single blac k, self-tapping screw from the left side of the printer , below the F an. CA UTION Lift the Engine carefully , being sure that all cables are disconnected. 4 Lift the Engine aw a y from the P aper F ee[...]

6-44 Removing and Replacing Parts Engine Contr oller Board Note After you replace the Engine Controller Board, do not f orget to readjust the top margin as described on page 6-46. 1 Separate the Engine from the P aper Feed Module (page 6-42). The Engine Controller Board is on the underside of the Engine and contains the f ollowing: • DC controlle[...]

Separating the Engine Module from the Paper Feed Module 6-45 F acing the front of the Engine Module: 3 Remov e 7 screws (sho wn in Figure 6-41 on page 6-44): • 4 b lack, self-tapping M4 scre ws (3 in front and 1 in the r ight rear) • F rom the left rear , 3 M3 screws (1 recessed) 4 Disconnect the spring on the r ight side from the notch. 5 Disc[...]

6-46 Removing and Replacing Parts Adjusting the T op Margin When you replace the Engine Controller Board, y ou must readjust the top margin as f ollows: Figure 6-43 Location of VR501 1 After setting the VR501 on the Engine Controller Board to the center position (0), load letter or A4 paper in the tra y . Press the Engine T est Pr int Button (locat[...]

Separating the Engine Module from the Paper Feed Module 6-47 Figure 6-44 Adjusting the top margin 2 Measure the distance between the edge of the paper and the print patter n. Measure all the test prints and calculate the avera g e. 3 Adjust VR501 so that the margin becomes .08 in (2 mm). T ur n VR501 clockwise to decrease the margin or counter-cloc[...]

6-48 Removing and Replacing Parts P aper Feed Rollers The f ollowing procedure is the same f or all HP LaserJet 4000 and 4050 series pr inters; there are 2 F eed Rollers for the HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN and one Feed Roller f or the HP LaserJet 4000/4000 N and 4050/4050 N pr inters. Figure 6-45 Removing the P aper Feed Rollers ([...]

Separating the Engine Module from the Paper Feed Module 6-49 Separation Rollers Figure 6-46 Removing the Separ ation Rollers The Separation Rollers are inside the paper tra ys. 1 Release the latch and lift the cov er inside the tray . 2 Pinch the release at the left side of the Roller and slide it off the shaft.[...]

6-50 Removing and Replacing Parts P aper Feed Module Plate Remov e the P a per F eed Module Plate to access the Controller PCA. This procedure is the same f or one 500-sheet T ray or tw o 250-sheet Tr a y s . Figure 6-47 Removing the P aper Feed Module Plate 1 Remov e the 7 b lac k self-tapping scre ws (one of them is recessed in front). 2 Remov e [...]

Separating the Engine Module from the Paper Feed Module 6-51 P aper Feed Module Gear T rain Assembly This procedure is the same f or one 500-sheet T ray or tw o 250-sheet Tr a y s . Figure 6-48 Removing the Gear T rain 1 Remov e the long recessed screw sho wn. 2 Unplug the connector (note routing). 3 Lift the gear train upward, a way from the P ape[...]

6-52 Removing and Replacing Parts P aper Feed Module Side Rails Remov e the P a per F eed Module side rails to access the PCA Controller . This procedure is the same for one 500-sheet T ra y or two 250-sheet T ray s. Figure 6-49 Removing the P aper Feed Module side rails (HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN shown) 1 T o remov e the side r[...]

Separating the Engine Module from the Paper Feed Module 6-53 Lower P aper Feed Module Plate (HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN) Figure 6-50 Removing the lo wer P aper Feed Module Plate 1 Remov e 9 blac k self-tapping screws. 2 Remov e 2 small blac k M3 screws . 3 Lift up the lower P aper F eed Module Plate to remov e it.[...]

6-54 Removing and Replacing Parts PCA Co ver (HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN) Figure 6-51 Removing the PCA Co ver (HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN) 1 Pinch the left and right sides of the PCA Cov er to release it from the side latches. 2 Rotate the PCA Cov er downw ard and toward y ou to remove it.[...]

Separating the Engine Module from the Paper Feed Module 6-55 PCA Co ver (HP LaserJet 4000/4000 N and 4050/4050 N) Figure 6-52 Removing the PCA Co ver (HP LaserJet 4000/4000 N and 4050/4050 N) 1 Release the latches shown. 2 Remov e the PCA Cov er .[...]

6-56 Removing and Replacing Parts PCA Contr oller This procedure is the same f or one 500-sheet T ray or tw o 250-sheet Tr a y s . Figure 6-53 Removing the PCA Controller 1 Unplug 3 connectors to the PCA Controller . 2 Unclip the left side of the PCA Controller and remov e it.[...]

Overview 7-1 7 T roub leshooting Overview This chapter discusses the f ollowing: ● T roubleshooting Process ● T roubleshooting the Printing System ● Ref erence Diagrams[...]

7-2 Troubleshooting T r oubleshooting Pr ocess The troubleshooting process is a systematic approach that addresses the major problems first, and then other prob lems as you identify the causes f or printer malfunctions and errors. The “T roubleshooting Flowchart” on page 7-4 illustrates the major steps for troub leshooting the printing system. [...]

Troubleshooting Process 7-3 General P aper Path T roub leshooting (page 7-45) Is there a paper jam in the printer? This section gives inf or mation about solving problems in the paper path. Inf or mation P ages (page 7-48) Will the printer print information pages successfully? This section gives the procedures f or pr inting the inf or mation pages[...]

7-4 Troubleshooting T roub leshooting Flo wchar t Figure 7-1 T roubleshooting Flowchart (1 of 2)[...]

Troubleshooting Process 7-5 T roubleshooting Flo wchar t (Continued) T roubleshooting Flowchart, continued[...]

7-6 Troubleshooting T roub leshooting the Printing System Preliminary Operating Checks Prior to troubleshooting a specific printer problem, y ou should ensure that: ● The printer is being maintained on a regular basis as descr ibed in Chapter 4. ● The customer is using acceptable paper as specified in the HP Pr inter F amily Paper Specification[...]

Troubleshooting the Printing System 7-7 Po w e r O n Note It is impor tant to hav e the pr inter’ s Control P anel functional as soon as possible in the troub leshooting process so that the pr inter’ s diagnostics can assist in locating printing errors. T able 7-2. P ower On Defect or Blank Displa y Prob lem Action Is the power cord plugged int[...]

7-8 Troubleshooting Note The F an only operates during initial power on and while printing, unless the temperature inside the printer is too high. If the temperature is too high, the F an tur ns on to cool the inside of the pr inter . Does the F an tur n on for about 4 seconds when you first turn the pr inter on? Note: F an operation is significant[...]

Troubleshooting the Printing System 7-9 T able 7-3. No A C P ower Cause Action No correct voltage present at the outlet. Plug the power cord into another A C circuit outlet. Inf or m the customer that the correct line voltage is not a vailab le at the outlet. The power cord is not firmly plugged into the printer and the outlet. Inser t the power pl[...]

7-10 Troubleshooting T able 7-4. No DC P ower Cause Action No A C power is supplied. Check the A C power supply . See T able 7-3, “No A C P ower ,” on page 7-9 The ov ercurrent/ov er voltage detection circuit activated. If the prob lem is not rectified after the power s witch is tur ned off and on again, find the cause of activation of the ov e[...]

Troubleshooting the Printing System 7-11 Engine T est The printer has one test patter n (ver tical lines). When an image def ect appears, a test print can be made to identify the problem. The test print can be made by pressing the test print switch located on the left side of the printer (see Figure 7-2 on page 7-12). A test patter n can be printed[...]

7-12 Troubleshooting Figure 7-2 Location of the Engine T est Button Printing an Engine T est T o pr int an engine test, use a non-metallic object (such as a pencil) to press the engine test button. A single test page with v er tical lines prints. T o pr int multiple test pages, hold do wn the engine test button. Displa y The Control P anel should d[...]

Troubleshooting the Printing System 7-13 Event Log Use the Event Log to diagnose and troub leshoot pr inter errors and intermittent failures. Y ou can either displa y or print the Event Log. Access the Event Log from the Control P anel’ s Information Menu. (Select PRINT EVENT LOG or SHOW EVENT LOG .) The Event Log retains the printer’ s last 30[...]

7-14 Troubleshooting Figure 7-3 Sample Ev ent Log Most recent error (up to 30)[...]

Troubleshooting the Printing System 7-15 Display the Event Log If the printer cannot pr int or mov e any paper , f ollow these steps to displa y the Event Log. Otherwise , print the ev ent log. 1 Press [Menu] until INFORMATION MENU appears. 2 Press [Item] until SHOW EVENT LOG appears. 3 Press [Select] to show the Ev ent Log. 4 Press [+] to scroll t[...]

7-16 Troubleshooting Interpret the Event Log The Ev ent Log is the ke y tool in troubleshooting printer problems . Figure 7-3 shows a typical Ev ent Log. The Event Log shows the current page count at the top left of the page with the printer’ s serial number directly to the right of the page count. The left column is the error sequence number , w[...]

Troubleshooting the Printing System 7-17 Printer Messages The f ollowing tab les explain messages that might displa y on the printer’ s Control P anel. Alphabetical printer messages and their meanings are listed in T able 7-5, and numerical printer messages are listed in T able 7-6. Hint If a message persists requesting that you load a tr ay , or[...]

7-18 Troubleshooting T able 7-5. Alphabetical Printer Messages Control P anel Message Event Log Message Explanation Recommended Action ACCESS DENIED MENUS LOCKED The Control P anel function you are trying to access has been lock ed by the network administrator to pre vent unauthorized access. Ask the network administrator to unloc k the function. B[...]

Troubleshooting the Printing System 7-19 CHOSEN LANGUAGE NOT AVAILAB LE A print job requested a printer language that does not e xist in the printer. The job will not print and will be cleared from memor y . 1. Print the job using a driver f or a different printer language, or add the requested language to the printer (if av ailable). 2. Press [Go][...]

7-20 Troubleshooting DISK IS WRITE PROTECTED The EIO disk is protected, and no new files can be written to it. Disable the write protection through HP JetAdmin. EIO n DISK INI TI ALIZI NG The disk accessor y card takes a long time to initialize . The first parameter is the accessor y slot number f or this disk accessor y card. EIO n DISK NOT F U N [...]

Troubleshooting the Printing System 7-21 ENV FEEDER LOAD [TYPE] [SIZE] There is no env elope in the f eeder , the wrong size is loaded in the f eeder , or the type and size is set incorrectly in the Control P anel. 1. Load the requested env e lope type and size into the Env elope F eeder . 2. Make sure the en velope size and type are set correctly [...]

7-22 Troubleshooting FLASH IS WRITE PROTECTED The flash DIMM is protected, and no new files can be written to it. Disable the write protection through HP JetAdmin. INITIALIZ IN G If the message displays continually , a DIMM may not be inser ted completely . Reseat DIMM(s). IN PUT DEVICE CON DITION XX.YY An input paper handling de vice has a conditi[...]

Troubleshooting the Printing System 7-23 LOADING PROGRAM <NUMB ER> alternates with DO NOT POWER OFF Programs and f onts can be stored on the printer’ s file system. At bootup time these entities are loaded into RAM. (These entities can take a long time to load into RAM depending on the size and number of entities being loaded.) The <NUMB[...]

7-24 Troubleshooting MEMORY SETTINGS CHANGED The printer changed its memor y settings because it did not hav e enough memor y to use the pre vious settings for I/O Buff er ing and Resource Saving. This usually occurs after removing memor y from the printer , adding a Duple xer , or adding a printer language. Y ou might want to change memor y settin[...]

Troubleshooting the Printing System 7-25 RAM DISK DEVICE FAILURE The RAM disk had a critical failure and can no longer be used. 1. T urn the printer off, and then turn the pr inter on to clear the message. 2. If the message persists, install a new RAM disk. RAM DISK FILE OPERATION FAILED The requested operation could not be perf or med. Y ou might [...]

7-26 Troubleshooting TRAY X EMPTY The specified tray is empty , but the current job does not need this tra y in order to print correctly . If this message appears and the tra y contains paper , a sensor could be damaged. PS101 detects paper in Tr a y 2 . PS105 detects paper in Tr a y 1 . PS107 detects paper in T ra y 3 (HP LaserJet 4050 T/4050 TN).[...]

Troubleshooting the Printing System 7-27 TRAY X LOAD [TYPE] [SIZE] One of the f ollowing occurred: There is no paper loaded in the specified tra y , or the paper is not the size requested, or the Control P anel is not set for the size of paper loaded. The tra y is not properly adjusted f or size. The def ault paper size is set incorrectly . If this[...]

7-28 Troubleshooting UNABLE TO MOPY JOB Memor y or file system f ailures would not allow a mop y job to occur . Only one cop y will be produced. UNSUPPOR TED S IZ E I N TRAY [ YY] An e xter nal paper handling de vice detected an unsuppor ted paper size. The printer will go offline until the condition is corrected. Load a suppor ted paper size in th[...]

Troubleshooting the Printing System 7-29 T able 7-6. Numerical Printer Messages Control P anel Message Event Log Message Explanation Recommended Action 13.XX PAPER J AM [LOCATION] P aper is jammed at the specified location (and possibly at other locations). If the message persists after all jams hav e been cleared, a sensor or sensor le ver might b[...]

7-30 Troubleshooting 13.5 PAPER JAM 13.5 Paper dela y jam at Fuser . For 13.5 and 13.6 : 1. Check the T ransf er Roller and Small Media Belt to ensure they are operating and can f eed paper . 2. Check the paper path f or obstructions at the T ransfer Roller , T oner Car tridge, P aper Feed Guide, and Fuser . 3. Check PS501 and PS106 f or proper ope[...]

Troubleshooting the Printing System 7-31 20 INSUFFICIENT MEMORY alternates with PRESS GO TO CONTINUE The printer received more data than can fit in its av ailable memory . Y ou might hav e tried to transf er too many macros, soft f o nts, or comple x graphics. Press [Go] to print the transf erred data (some data might be lost), then simplify the pr[...]

7-32 Troubleshooting 22 PARALLEL I/O B UFFER OVERFLOW alternates with PRESS GO TO CONTINUE T oo much data w as sent to the parallel port. This error can occur if the driver yo u are using is not IEEE-1284 compliant. F or best results, use an HP driver that came with the printer . Check f or a loose cable connection and be sure to use a high-quality[...]

Troubleshooting the Printing System 7-33 40 BAD SERIAL TRANSMISSION alternates with PRESS GO TO CONTINUE The printer encountered an error while transf erring data from the computer . The error might hav e occurred for se veral reasons: The computer was turned on or off while the printer was online . The printer’ s serial configuration was not the[...]

7-34 Troubleshooting 41.3 UNEXPECTED PAPER SIZE The paper size y ou are tr ying to print is not the same as the settings f or the tra y . 1. Make sure that all tra ys are correctly adjusted f or size . (The printer will continue trying to pr int the job until size settings are correct.) If you are trying to print from T ra y 1, make sure the printe[...]

Troubleshooting the Printing System 7-35 50 .X FUSER ERROR A Fuser error has occurred. X Description: 1 = Low Fuser temperature 2 = Fuser warm up ser vice 3 = High Fuser temperature 4 = Low/Bad line v oltage. (Printer hooked up to UPS uninterruptible power supply) 5 = Inconsistent Fuser T urn the pr inter off , wait 20 minutes, and then turn the pr[...]

7-36 Troubleshooting 51.X PRINTER ERROR A loss of beam detect occurred. X Description: 1 = Beam detect error 2 = Laser error 1. Press [Go] . The page containing the error will automatically be reprinted. 2. T urn the pr inter off and then on. 3. Reseat cables . See the wiring diagrams at the back of this manual. 4. Replace the Laser Scanner . 52.X [...]

Troubleshooting the Printing System 7-37 53.XY.ZZ PRINTER ERROR There is a memor y error with an accessor y . The DIMM that caused the error will not be used. V alues of X , Y , and ZZ are as f ollows: X = DIMM type 0 = ROM 1 = RAM Y = De vice location 0 = internal memor y (ROM or RAM) 1 to 4 = DIMM slots 1, 2, 3, or 4 ZZ= Error number 0 = Unsuppor[...]

7-38 Troubleshooting 55 PRINTER ERROR alternates with PRESS GO TO CONTINUE An internal communications error occurred. 1. Press [Go] . The page containing the error will automatically be reprinted. 2. Check the po wer at the customer’ s location. 3. Replace the F or matter PCA. 4. Replace the Engine Controller Board. 56.X PRINTER ERROR A temporary[...]

Troubleshooting the Printing System 7-39 59 .X PRINTER ERROR A printing error occurred. X Description: 0 = Motor error 1 = Motor star tup error 2 = Motor rotation error 1. T urn the printer off, and then turn the pr inter on. 2. Check and reseat the Fuser and T oner Car tridge to make sure the y are not hindering gear movement in the drive train. 3[...]

7-40 Troubleshooting 68 NVRAM ERROR CHECK SETTINGS An error occurred in the printer’ s nonv olatile memor y (NVRAM) and one or more printer settings has been reset to its f actor y default. 1. Print a Configuration P age and check the printer settings to determine which values hav e changed. 2. Hold down [Cancel Job] while turning the printer on.[...]

Troubleshooting the Printing System 7-41 79 .XXXX PRINTER ERROR The printer detected an error . The numbers ( XXXX ) indicate the specific type of error . 1. T urn the printer off, and then turn the pr inter on. 2. T ry pr inting a job from a diff erent software application. If the job prints, go back to the first application and tr y printing a di[...]

7-42 Troubleshooting 8X.YYYY The EIO accessor y in slot X has encountered a critical error as specified by YYYY . X Description: 1 = EIO slot 1 – The printer detected an error with the EIO card. 2 = EIO slot 2 – The printer detected an error with the EIO card. 6 = EIO slot 1 – The EIO card detected an error . The EIO card ma y be def ective .[...]

Troubleshooting the Printing System 7-43 The f ollowing tab le lists the disk error numbers repor ted on either the Printer Collation or Job Storage Disk Error page, which is printed when an error exists . T able 7-7. Mopy Disk Err or Messages Disk Error Number Error Description Solution 1 Disk v olume not present – it ma y be uninitialized. • [...]

7-44 Troubleshooting 59 The maximum n umber of directories has been reached There is a maximum nu mber of directories that can be put on a disk. Stored jobs are stored in directories created for each user . T o solv e this problem: • Delete all jobs stored f or a user . The firmware will automatically delete the director y f or a user with no sto[...]

Troubleshooting the Printing System 7-45 General P aper Path T r oubleshooting P aper jams occur in the printer when paper does not either reach or clear a photosensor along the printer’ s paper path in a specific amount of time. If a paper jam occurs , a 13.XX PAPER JAM message is displa yed on the printer’ s Control Panel. The f ollowing tabl[...]

7-46 Troubleshooting There are f our photosensors (PS102, PS103, PS106, PS501) in the paper path f or detecting arrival or passing of the paper . If the paper does not reach or pass these sensors within the prescribed time, the microprocessor on the Engine Controller Board assesses a paper jam and notifies the F or matter of the jam. See page 7-92 [...]

Troubleshooting the Printing System 7-47 P aper P a th T est T o perform a P aper P ath T est: 1 Press [Menu] until INFORMATION MENU appears. 2 Press [Item] until PRINT PAPER PATH TEST appears. 3 Press [Select]. 4 Press [+] to cycle selections until the desired paper tra y appears. 5 Press [Select]. 6 Press [+] until the desired output bin appears [...]

7-48 Troubleshooting Inf ormation P ages F rom the pr inter’ s Control Panel y ou can pr int pages that give details about the printer and its current configuration. The follo wing inf or mation pages are described here: ● Menu Map ● Configuration P age ● PCL or PS f ont list F or a complete list of the printer’ s information pages, print[...]

Troubleshooting the Printing System 7-49 Figure 7-5 Sample Menu Map (4000 series printer)[...]

7-50 Troubleshooting Figure 7-6 Sample Menu Map (4050 series printer)[...]

Troubleshooting the Printing System 7-51 Configuration P age Use the Configuration P age to view current printer settings, to help troubleshoot printer prob lems, or to v erify installation of optional accessories, such as memor y (DIMMs), paper tra ys, and printer languages. Note If an HP JetDirect print ser ver EIO card is installed, a JetDirect [...]

7-52 Troubleshooting Figure 7-7 Sample Configuration P age (4000 ser ies printer) Printer Information Lists the serial number , HP JetSend IP addresses, page counts, and other information f or the printer. Memory Lists printer memor y , PCL Dr iver work space (D WS), and I/O buff ering and resource sa ving information. Installed Per sonalities and [...]

Troubleshooting the Printing System 7-53 Figure 7-8 Sample Configuration P age (4050 ser ies printer) Printer Information Lists the serial number , HP JetSend IP addresses, page counts, and other information f or the printer. addresses, page counts, and other information f or the printer. Memory Lists printer memor y , PCL Dr iver work space (D WS)[...]

7-54 Troubleshooting V erify Installed Options Under “Installed P ersonality” on the Configuration P age, look f or options such as hard disk or DIMM types and sizes . V er ify that the options which are installed in the printer are reflected on the Configuration P age. If an installed de vice is not shown, reseat the de vice and print a new Co[...]

Troubleshooting the Printing System 7-55 Check the T oner Car tridge Image f or mation def ects are often the result of problems with the T oner Car tr idge. If there is any doubt, alw a ys replace the T oner Car tridge before troub leshooting image defects . Use the f ollowing chec klist to ensure that the T oner Car tridge is still operab le. ●[...]

7-56 Troubleshooting Note T oner Car tr idges are rated f or 6,000 or 10,000 images at 5% cover age (depending on the model). It is possible to w ear out the gears and the car tridge seals before TONER LOW is displa yed if the number of images e xceeds 6,000 or 10,000 (depending on the model). See “EconoMode” below . ● Check the surf ace of t[...]

Troubleshooting the Printing System 7-57 Image Defects The quality of the printer’ s output is subject to the judgment of the user . This section of the manual helps you define print quality def ects and understand what f actors aff ect print quality . The print samples shown in the f ollowing tab les illustrate some print quality def ects. K eep[...]

7-58 Troubleshooting Hint If you find a def ect that is not depicted, record the probable cause along with the conditions in the printing environment and sav e a copy of the def ect for future ref erence. T able 7-11. Black P age P ossible Cause Action The high-voltage power supply connections are contaminated. Clean the high-voltage po wer supply [...]

Troubleshooting the Printing System 7-59 T able 7-12. Blank Pa ge P ossible Cause Action No T oner is av ailable fo r p r i n t . Remo ve sealing tape or replace the T oner Car tridge. Def ective laser shutter . Check the laser shutter for free oper ation when inser ting the T oner Car tridge. T oner Car tridge Guide damaged, improperly positioned,[...]

7-60 Troubleshooting T able 7-13. Blank Spots P ossible Cause Action P aper does not meet printer specifications or is stored improperly . 1. Print a fe w more pages to see if the problem corrects itself . 2. T urn over the stac k of paper in the tra y . Also tr y rotating the paper 180°. 3. Check the paper (or other print media) type and quality [...]

Troubleshooting the Printing System 7-61 T able 7-14. Creases P ossible Cause Action P aper does not meet printer specifications or is stored improperly . 1. Print a fe w more pages to see if the problem corrects itself . 2. T u rn over the stac k of paper in the tra y . Also tr y rotating the paper 180°. 3. Check the paper (or other print media) [...]

7-62 Troubleshooting T able 7-15. Curl P ossible Cause Action P aper does not meet printer specifications or is stored improperly . 1. Print a fe w more pages to see if the problem corrects itself . 2. T urn over the stac k of paper in the tra y . Also tr y rotating the paper 180°. 3. Check the paper (or other print media) type and quality . Repla[...]

Troubleshooting the Printing System 7-63 T able 7-16. Contamination on Back P ossible Cause Action Contamination inside printer (T ra y Separation Roller , F eed Roller , T ransf er Roller , Fuser, T oner Car tridge). 1. Print at least 10 pages to see if the problem goes away . 2. Print a cleaning page (page 4-4). Identify and clean the contaminate[...]

7-64 Troubleshooting T able 7-17. Distor ted Image P ossible Cause Action P aper does not meet printer specifications or is stored improperly . 1. Print a fe w more pages to see if the problem corrects itself . 2. T urn over the stac k of paper in the tra y . Also tr y rotating the paper 180°. 3. Check the paper (or other print media) type and qua[...]

Troubleshooting the Printing System 7-65 T able 7-18. Dropouts P ossible Cause Action P aper might be too smooth. Check the paper (or other print media) type and quality . Printer’ s operating environment does not meet specifications. Make sure the printer’ s operating en vironment meets specifications. Wrong T oner density setting. F rom the p[...]

7-66 Troubleshooting T able 7-20. Gray Bac kground P ossible Cause Action P aper does not meet printer specifications or is stored improperly . 1. Print a fe w more pages to see if the problem corrects itself . 2. T urn over the stac k of paper in the tra y . Also tr y rotating the paper 180°. 3. Check the paper (or other print media) type and qua[...]

Troubleshooting the Printing System 7-67 T able 7-21. Horizontal Black Lines P ossible Cause Action Def ective Laser Scanner Assembly or Engine Controller Board. 1. See the “Repetitive Def ect Ruler” on page 7-73. 2. Reseat connectors on the Laser Scanner and Engine Controller Board. 3. Replace the Laser Scanner Assembly f ollowed by the Engine[...]

7-68 Troubleshooting T able 7-24. Light Print, Dark Print, or Fade P ossible Cause Action Wrong T oner density setting. F rom the print quality menu on the Control P anel, adjust the T o ner density setting. Make sure EconoMode is off . T oner Car tridge is low . Replace the T oner Car tr idge. T ransf er Roller is def ective . Replace the T ransf [...]

Troubleshooting the Printing System 7-69 T able 7-25. Loose T oner P ossible Cause Action Contamination in the printer . 1. Print a few more pages to see if the prob lem corrects itself . 2. Clean the inside of the printer (page 4-2) or use the printer’ s cleaning page (page 4-4). T oner Car tridge is def ective . Replace the T oner Car tridge. P[...]

7-70 Troubleshooting T able 7-27. Skew P ossible Cause Action P aper does not meet printer specifications or is stored improperly . 1. Print a fe w more pages to see if the problem corrects itself . 2. T urn over the stac k of paper in the tra y . Also tr y rotating the paper 180°. 3. Check the paper (or other print media) type and quality . Repla[...]

Troubleshooting the Printing System 7-71 T able 7-29. T oner Specks P ossible Cause Action Contamination in printer . 1. Print a few more pages to see if the prob lem corrects itself . 2. Clean the inside of the printer (page 4-2) or use the printer’ s cleaning page (page 4-4). P aper does not meet printer specifications or is stored improperly .[...]

7-72 Troubleshooting T able 7-31. V ertical Dots P ossible Cause Action Contaminated Static Eliminator teeth. Clean the Static Eliminator . P oor contact between the Static Eliminator and the Engine Controller Board. Clean the contacts, if contaminated. If the prob lem remains after cleaning, or par ts are damaged or def or med, replace them. Def o[...]

Troubleshooting the Printing System 7-73 Repetitive Defect Ruler Repetitive print def ects are usually associated with a specific roller within the printer or the T oner Car tridge. Use Figure 7-9 to isolate the cause of repetitive print def ects. Align the first occurrence of the def ect with the top of the “ruler” and measure to the next occu[...]

7-74 Troubleshooting Image System T roubleshooting Half Self T est Functional Chec k The electrophotographic process can be subdivided into the f ollo wing stages: ● Cleaning (remov es excess T oner from Dr um surf ace) ● Conditioning (places a unif or m electrical charge on Dr um) ● Writing (laser str ikes surf ace of Dr um and creates laten[...]

Troubleshooting the Printing System 7-75 Drum Rotation Functional Chec k The Photosensitive Drum, located in the T oner Car tr idge, m ust rotate f or the print process to work. The Photosensitive Drum receives its drive from the Main Drive Assemb ly . T o verify whether the Drum is rotating: 1 Open the T op Cov er . 2 Remov e the T oner Car tridge[...]

7-76 Troubleshooting High-v oltage P ower Supply Functional Chec k The High-voltage P ow er Supply Assembly pro vides the necessar y v oltages for the printer’ s electrophotographic processes. The +24B VDC supply is used to power the High-v oltage P ower Supply Assembly . A summar y of the major components of the High-voltage System is giv en in [...]

Troubleshooting the Printing System 7-77 Interface T roubleshooting This section provides an o verview of the printer’ s interface requirements. Communications Chec k Note Communication prob lems are nor mally the customer’ s responsibility . Time spent attempting to resolv e these prob lems ma y not be co v ered by the product’ s He wlett-P [...]

7-78 Troubleshooting Figure 7-10 Sample JetDirect Configuration P age (4000 ser ies printer) Network statistics I/O card status IP address Node name Nov ell status[...]

Troubleshooting the Printing System 7-79 Sample JetDirect Configuration P age (4050 ser ies printer)[...]

7-80 Troubleshooting HP JetDirect Configuration ● If the HP EIO JetDirect Card has successfully powered up and completed its internal diagnostics, the I/O CARD READY message appears. If communication is lost, an I/O NOT READY message appears f ollowed b y a two-digit error code. See the HP JetDirect Network Interface Configur ation Guide f or fur[...]

Troubleshooting the Printing System 7-81 A UT OEXEC.B A T Standard Configurations P arallel DOS Commands If the pre vious check did not produce the desired result, ensure that the A UTOEXEC .BA T file contains the follo wing statements f or parallel interf ace communications: MODE LPT1: , , P F or MS-DOS version 4.0 and abo ve: MODE LPT1: , , B Not[...]

7-82 Troubleshooting Communications Chec ks T able 7-34. Communications Chec ks Checks Action Is your computer configured to the parameters described in the configuration instructions? These parameters are required to communicate with the printer . V erify that the configuration of the computer's communications por t matches these parameters. [...]

Troubleshooting the Printing System 7-83 If the host system and printer still are not communicating and you hav e addressed the issues in T able 7-34, replace the F or matter PCA and the EIO card and reconfigure the printer . If the problem persists , a protocol analyzer ma y be needed to find the source of the problem. CA UTION HP LaserJet pr inte[...]

7-84 Troubleshooting Reference Dia grams Locations of Components Figure 7-11 Components of the P aper Pick up and F eed System (HP LaserJet 4000/4000 N and 4050/4050 N)[...]

Reference Diagrams 7-85 T able 7-35. Components in Figure 7-11 PS101 T ray 2 P aper Out Sensor PS102 Pre-Feed Sensor PS103 T op of Page Sensor PS104 T op Output Bin Full Sensor PS105 T ray 1 P aper Out Sensor PS106 Fuser Deliver y Sensor 2 PS501 Fuser Deliver y Sensor 1 SL101 T ray Pic kup Solenoid SL102 T ray 1 Pic kup Solenoid CL101 F eed Roller [...]

7-86 Troubleshooting Figure 7-12 Components of the P aper F eed System (HP LaserJet 4000/4000 N and 4050/4050 N with Optional 500-sheet Universal T ra y Assembly)[...]

Reference Diagrams 7-87 Figure 7-13 Components of the Duple x er[...]

7-88 Troubleshooting Figure 7-14 Components of the Fusing and Delivery Unit[...]

Reference Diagrams 7-89 Figure 7-15 Components of the Env elope Feeder[...]

7-90 Troubleshooting P a per P ath Figure 7-16 P aper P ath (HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN Shown) Figure 7-17 P aper P ath with the Duplex er[...]

Reference Diagrams 7-91 Figure 7-18 P aper Path with the En v elope Feeder[...]

7-92 Troubleshooting Figure 7-19 P aper Sensors and the P aper P ath T able 7-36. Paper Sensor s in Figure 7-19 PS102 Pre-Feed Sensor Sensor and flag located on Registration/F eed Sensor Assembly . PS103 T op of Page Sensor Sensor and flag located on Registration/F eed Sensor Assembly . PS106 Fuser Paper Deliv er y Sensor 2 Sensor and flag located [...]

Reference Diagrams 7-93 Engine Contr oller Board Figure 7-20 Engine Controller Board La yout T able 7-37. Engine Controller Boar d Lay out SW1 P ower s witch SW501 T est print switch VR201 Adjusted at factory VR501 T op of page adjustment VR601 Adjusted at factory[...]

7-94 Troubleshooting P aper Siz e Detection Switches Figure 7-21 P aper Size Detection Switches (1 of 3), T ra y 2 (HP LaserJet 4000/4000 N and 4050/4050 N) Figure 7-22 P aper Size Detection Switches (2 of 3), T ra ys 2 and 3 (HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN) To p Tr a y 3 Switches Tr a y 2 Switches[...]

Reference Diagrams 7-95 Figure 7-23 P aper Size Detection Switches (3 of 3), Optional 500-sheet Universal T ra y Assembly T able 7-38. Paper Size Detection Switches in Figure 7-21 to Figure 7-23 P aper Size Paper Size Detection Switch SW600/603/801 SW601/604/802 SW602/605/803 No tra y OFF OFF OFF Legal OFF OFF ON Ex ecutive OFF ON OFF Letter OFF ON[...]

7-96 Troubleshooting Motors Figure 7-24 Location of Motors T able 7-39. Motors in Figure 7-24 M101 Main Motor M701 Re versing Motor (Duple x er) M702 Duple x Feed Motor (Duple xer) FM101 Cooling F an FM701 Duple xer Exhaust F an (Duplex er) H901 Fusing Heater[...]

Reference Diagrams 7-97 Connectors Figure 7-25 Connectors (1 of 3)[...]

7-98 Troubleshooting Figure 7-26 Connectors (2 of 3)[...]

Reference Diagrams 7-99 Figure 7-27 Connectors (3 of 3) F or locations of connectors see the wir ing diagrams at the bac k of this manual.[...]

7-100 Troubleshooting PCAs Figure 7-28 Location of PCAs[...]

Reference Diagrams 7-101 T able 7-40. Location of PCAs 1 Engine Controller Board Sequence control, High-voltage output, DC output, and Heater Drive. 2 P aper Size Detection PCA Rela y between Sensors/Solenoids and Engine Controller Board, and P aper Size Detection. 3 P aper F eeder Driver PCA Control and detection of solenoids in the Paper F eeder.[...]

7-102 Troubleshooting Sensors and Thermistor Figure 7-29 Location of Sensors and Ther mistor (1 of 2)[...]

Reference Diagrams 7-103 Figure 7-30 Location of Sensors and Thermistor (2 of 2) T able 7-41. Sensors and Thermistor in Figure 7-29 and Figure 7-30 PS101 T ray 2 P aper Out Sensor PS102 Pre-feed Sensor PS103 T op of Page Sensor PS104 T op Output Bin Full Sensor PS105 T ray 1 P aper Out Sensor PS106 Fuser Paper Deliv er y Sensor 2 PS107 T ray 3 P ap[...]

7-104 Troubleshooting PS703 Rev ersed P aper Sensor (Duplex er) PS801 Paper F eeder P aper Sensor (P aper F eeder) PS901 Envelope Sensor (En velope F eeder) PS902 Envelope Multiple F eed Sensor (Envelope F eeder) TH901 Fusing Surface T e mperature Sensor T able 7-41. Sensors and Thermistor in Figure 7-29 and Figure 7-30 (continued)[...]

Reference Diagrams 7-105 Solenoids and Clutch Figure 7-31 Location of Solenoids and Clutch (1 of 2)[...]

7-106 Troubleshooting Figure 7-32 Location of Solenoids and Clutch (2 of 2)[...]

Reference Diagrams 7-107 T able 7-42. Solenoids and Clutch in Figure 7-31 and Figure 7-32 CL102 F eed Roller Clutch SL101 T ray 2 Pic kup Solenoid SL102 T ray 1 Pic kup Solenoid SL103 T ray 3 Pic kup Solenoid (HP LaserJet 4000 T/TN and 4050 T/TN) SL701 Duple xer Solenoid (Duple xer) SL801 P aper Feeder Pic kup Solenoid (Paper F eeder) SL901 Env elo[...]

7-108 Troubleshooting Switches Figure 7-33 Location of Switches[...]

Reference Diagrams 7-109 T able 7-43. Switches in Figure 7-33 SW101 Door open detection s witch SW600 T ra y 2 P aper size s witch SW601 T ra y 2 P aper size s witch SW602 T ra y 2 P aper size s witch SW603 T ra y 3 paper siz e s witch (HP LaserJet 4000 T/TN and 4050 T/TN) SW604 T ra y 3 paper siz e s witch (HP LaserJet 4000 T/TN and 4050 T/TN) SW6[...]

7-110 Troubleshooting Timing Figure 7-34 Pick up Timing for T ray 2 (and lo wer tra ys) Figure 7-35 Pick up Timing for T ray 1[...]

Overview 8-1 8 P ar ts and Diag r ams Overview This chapter discusses the f ollowing: ● How T o Use the P ar ts Lists and Diagrams ● Accessories and Supplies ● Illustrations and P ar ts Lists[...]

8-2 Parts and Diagrams How T o Use the P ar ts Lists and Diagrams The figures in this chapter illustrate the major subassemb lies in the printer and their component par ts. A table accompanies each e xploded view diagr am. Each table lists the item n umber for the replaceable part, the associated par t number f or the item, the quantity , and a des[...]

How To Use the Parts Lists and Diagrams 8-3 Note P ar ts that hav e no item number or par t number listed are not field replacement par ts and cannot be ordered.[...]

8-4 Parts and Diagrams Accessories and Supplies The f ollowing items are a vailab le through your local authorized HP dealer . T o find a dealer near you, call the HP Customer Inf or mation Center (800) 752-0900. Note See page 2-4 f or documentation product numbers. T able 8-1. Accessories and Supplies Description P ar t No. Exchange No. Product No[...]

Accessories and Supplies 8-5 * The maintenance kits can be ordered from Suppor t Materials Organization (U .S.) or Support Mater ials Europe. See page 8-2 f or order ing information. F ont DIMM (8 MB Asian MROM) T raditional Chinese Simplified Chinese Euro C4292A C4293A FIR Receiver (4050 only) C4103-67901 C4103A Hard Disk C2985A P arallel Cables 2[...]

8-6 Parts and Diagrams Common Screws and Replacement Cab les T able 8-2. Screws Used in the Printer Description P ar t No. Screw , M4x10, self-tapping (blac k) XA9-0870-000CN Screw , M3x4, washer head XA9-0434-000CN Screw , M3x6, with star washer F A9-1449-000CN Screw , M3x6, washer head XA9-0267-000CN Screw , M4x12, self-tapping XA9-0773-000CN Scr[...]

Accessories and Supplies 8-7 T able 8-3. Replaceable Cables Description P ar t No. T able No. Item No. Cable and P ower Receptacle RG5-3696-000CN T able 8-7 on page 8-15 15 Cable , T ra y 1 Sensor RG5-3700-000CN T able 8-7 on page 8-15 14 Cable , Laser Scanner , and Output Bin Sensor RG5-3876-000CN T able 8-8 on page 8-17 20 Cable , P aper Feed/T r[...]

8-8 Parts and Diagrams Illustrations and P ar ts Lists Figure 8-1 Assembly Location Diag ram Engine Controller Board Assembly T ra y 1 Pick up Assembly T op Cover Assemb ly P aper Delivery Assembly Fusing Assembly T ra y 1 Assembly P aper F eed Assembly Registration Assembly P aper F eed Guide Assembly Printer Dr iv e Assembly Delivery Drive Assemb[...]

Illustrations and Parts Lists 8-9 T able 8-4. Assemblies (Listed Alphabetically) and Their P ar t Numbers Description Part No. Exchange No. Exploded Vie w in Figure Delivery Drive Assembly RG5-3721-000CN Figure 8-8 on page 8-24 EIO Cov er 5021-0349 Engine Controller Board RG5-3693-000CN (110V) RG5-3694-000CN (220V) C4118-69006 (110V) C4118-69007 (2[...]

8-10 Parts and Diagrams Figure 8-2 External Covers and P anels 9 8 1 3 4 6 2 5 7[...]

Illustrations and Parts Lists 8-11 T able 8-5. External Cover s and Panels Item No. P ar t No. Quantity Description 1 RB1-8858-000CN 1 P anel, F or matter Cov er 2 RG5-2664-000CN 1 Cov er Assembly , Right F ront 3 RB1-8860-000CN 1 Clip , Right Side P anel 4 RB1-8849-000CN 1 P ower Switch Button 5 RG5-2667-000CN 1 T ra y 1 Door Assembly 6 RB1-8848-0[...]

8-12 Parts and Diagrams Figure 8-3 T op Cov er Assembly 2 3 4 1 5[...]

Illustrations and Parts Lists 8-13 T able 8-6. T op Cover Assemb ly Item No. Part No. Quantity Description 1 RG5-2663-000CN 1 T op Cov er Assembly 2 RB1-8841-000CN 1 P anel, T oner Car tr idge access 3 RB1-8846-000CN 1 Latch, Rear T ray 4 RB1-8847-000CN 1 Spring, Rear T ra y Latch 5 RB1-8710-000CN Plate Co ver[...]

8-14 Parts and Diagrams Figure 8-4 Intern al Components (1 of 3) 13 12 7 3 1 2 4 5 6 9 10 11 14 15 8 16 18 20 21 22 17 19[...]

Illustrations and Parts Lists 8-15 T able 8-7. Internal Components (1 of 3) Item No. P ar t No. Q uantity Description 1 RB1-8862-000CN 1 Guide, F or matter/CP Cable 2 RG5-3708-000CN 1 Cable F or matter/Control P anel 3 RB1-8703-000CN 2 Screw , Module Attachment 4 RH7-1331-000CN 1 Main Motor Assembly 5 RG5-3709-000CN 1 Cable, Main Motor 6 RG5-2645-0[...]

8-16 Parts and Diagrams Figure 8-5 Intern al Components (2 of 3) 1 2 3 4 5 6 9 10 11 12 14 15 16 18 19 17 7 13 20 8 21 22 23[...]

Illustrations and Parts Lists 8-17 T able 8-8. Internal Components (2 of 3) Item No. P ar t No. Quantity Description 1 RB2-2405-000CN 1 Plate, Control P anel Ground 2 RB1-8671-000CN 1 Suppor t, T op Cover , Left 3 RB1-8827-000CN 1 Leaf Spr ing 4 RB1-8689-000CN 1 Cable Holder 5 RB1-8708-000CN 1 Plate, Gear Plate Ground 6 RG5-2642-000CN 1 Registratio[...]

8-18 Parts and Diagrams 23 C4118-40002 C4118-40007 C4118-40020 C4118-40008 C4118-40009 C4118-40010 C4118-40011 C4118-40012 C4118-40013 C4118-40015 C4118-40017 C4118-40018 C4118-40019 C4118-40021 C4118-40022 C4118-40023 C4118-40025 C4118-40026 C4118-40029 C4118-40014 C4118-40024 C4118-40027 C4118-40028 C4118-40030 C4251-40001 C4251-40002 C4251-40014[...]

Illustrations and Parts Lists 8-19 Notes:[...]

8-20 Parts and Diagrams Figure 8-6 Intern al Components (3 of 3) 5 1 2 3 4[...]

Illustrations and Parts Lists 8-21 T able 8-9. Internal Components (3 of 3) Item No. P ar t No. Quantity Description 1 RF5-1867-000CN 1 Pre-T ransf er Ground Plate Assembly 2 RG5-4283-000CN 1 T ransf er Roller Assembly 3 RS5-0911-000CN 1 Gear , Coupler 4 RF5-2496-000CN 1 Plate, Gear 5 RB1-8747-000CN 1 Plate , Registration Ground[...]

8-22 Parts and Diagrams Figure 8-7 Engine Controller Board Assembly 1[...]

Illustrations and Parts Lists 8-23 T able 8-10. Engine Controller Boar d Assembly Item No. P ar t No. Exc hange No. Quantity Description 1 RG5-3693-000CN C4118-69006 1 Engine Controller Board (110V) 1 RG5-3694-000CN C4118-69007 1 Engine Controller Board (220V)[...]

8-24 Parts and Diagrams Figure 8-8 Delivery Drive Assembly 1 2 T able 8-11. Delivery Drive Assembly Item No. P ar t No. Quantity Description 1 RG5-3721-000CN 1 Delivery Dr ive Assembly 2 WG8-5362-000CN 1 Sensor , Optical[...]

Illustrations and Parts Lists 8-25 Figure 8-9 Printer Dr iv e Assembly 2 1 3 T able 8-12. Printer Drive Assembly Item No. P art No. Quantity Description 1 RG5-2653-000CN 1 Printer Dr ive Assemb ly 2 RB1-8757-000CN 1 Guide, Cable , Gear Assembly Plate 3 RB1-8756-000CN 1 Rod, T oner Drive[...]

8-26 Parts and Diagrams Figure 8-10 T ra y 1 Pickup Assemb ly 1 4 5 6 2 3 7[...]

Illustrations and Parts Lists 8-27 T able 8-13. T ray 1 Pic kup Assembly Item No. P ar t No. Q uantity D escription 1 RG5-2655-100CN 1 T ray 1 Pic kup Assembly 2 RB2-2386-000CN 1 Co ver En velope F eeder Dr ive 3 RG5-3718-000CN 1 T ray 1 Pic kup Roller Assembly 4 RB1-8787-000CN 1 Arm, T ra y 1 P aper Sensing 5 RB2-2387-000CN 1 Arm, T ra y 1 Retaini[...]

8-28 Parts and Diagrams Figure 8-11 T ra y 1 Assembly 1 T able 8-14. T ray 1 Assemb ly Item No. P ar t No. Quantity Description 1 RG5-2656-000CN 1 T ray 1 Assemb ly[...]

Illustrations and Parts Lists 8-29 Figure 8-12 P aper Feed Assemb ly 1 T able 8-15. Paper Feed Assemb ly Item No. P art No. Quantity Description 1 RG5-2651-000CN 1 P aper F eed Assembly[...]

8-30 Parts and Diagrams Figure 8-13 Registration Assemb ly 1 T able 8-16. Registration Assembly Item No. P art No. Q uantity Description 1 RG5-2652-070CN 1 Registration Assemb ly[...]

Illustrations and Parts Lists 8-31 Figure 8-14 P aper Feed Guide Assemb ly T able 8-17. Paper Feed Guide Assemb ly Item No. P ar t No. Quantity Description 1 RG5-2643-000CN 1 P aper F eed Guide Assembly 2 RF5-2495-000CN 1 Shaft, Belt Idler Assembly 3 RB1-8668-000CN 1 Belt, Feed Guide 4 RB1-8674-000CN 1 Shaft, Belt Drive 2 3 4 1[...]

8-32 Parts and Diagrams Figure 8-15 Delivery Assembly 3 4 1 2[...]

Illustrations and Parts Lists 8-33 T able 8-18. Delivery Assembly Item No. P art No. Quantity Description 1 RG5-2648-000CN 1 Deliv er y Assembly 2 RG5-2650-000CN 1 Deliv er y Sensor Ar m Assembly 3 RB2-2408-000CN 1 Arm, Output Kicker , Right 4 RB2-2409-000CN 1 Arm, Output Kicker , Left[...]

8-34 Parts and Diagrams Figure 8-16 Fuser Assembly (1 of 2) 1 2 T able 8-19. Fuser Assembly (1 of 2) Item No. Part No. Exchange No. Quantity Description 1 RG5-2661-000CN RG5-2662-000CN C4118-69003 C4118-69004 1 1 Fuser (110 V) Fuser (220 V) 2 RB1-8805-000CN 1 Pa nel, Fuser Cov er[...]

Illustrations and Parts Lists 8-35 Figure 8-17 Fuser Assembly (2 of 2) 1 2 3 T able 8-20. Fuser Assembly (2 of 2) Item No. P ar t No. Exchange No. Quantity Description 1 RG5-2661-000CN RG5-2662-000CN C4118-60003 C4118-60004 1 1 Fuser (110V) Fuser (220V) 2 RG5-4269-000CN RG5-4291-000CN 1 Fuser Film Assembly (110V) Fuser Film Assembly (220V) 3 RB1-87[...]

8-36 Parts and Diagrams Figure 8-18 Intern al Components of 500-Sheet F eeder 1 2 3 4 5 6 7 8 11 10 9 12 13 14[...]

Illustrations and Parts Lists 8-37 T able 8-21. Internal Components of 500-sheet Feeder Item No. P ar t No. Quantity Description 1 RB1-8890-000CN 1 Guide, P aper 2 RB1-8873-000CN 1 Suppor t, P aper Guide 3 RG5-2668-000CN 1 Cov er Feeder Right Assemb ly 4 RG5-3711-000CN 1 Cable , Sensor 5 RG5-2673-000CN 1 Feeder Controller PCA 6 RB1-8887-000CN 1 Lev[...]

8-38 Parts and Diagrams Figure 8-19 P aper Pick up Drive Assemb ly 1 2 3 4 5 6 7 8[...]

Illustrations and Parts Lists 8-39 T able 8-22. Paper Pic k up Drive Assembl y Item No. Part No. Quantity Description 1 RG5-2672-000CN 1 P aper Pickup Driv e Assembly (500-sheet) 2 RS5-2632-000CN 1 Spring, Pic kup 3 RB1-8877-000CN 1 Coupler , Pick up 4 RF5-2484-000CN 1 Pickup Roller Assemb ly 5 RB1-2190-000CN 1 Clip, Pic kup Spring 6 RB1-8865-000CN[...]

8-40 Parts and Diagrams Figure 8-20 500-sheet T ray 1 2 6 3 4 5 7 8 9 11 12 10[...]

Illustrations and Parts Lists 8-41 T able 8-23. 500-sheet T ra y Item No. P ar t No. Quantity Description 1 RB1-8947-000CN 1 P anel, Roller Access 2 RF5-2489-000CN 1 Mounting Assemb ly Separation Roller 3 RB1-8948-000CN 1 Gear , Separation Roller Drive 4 RB1-8946-000CN 1 Bushing, Separation Roller 5 RB1-8945-000CN 1 Coupler , Separation Roller 6 RS[...]

8-42 Parts and Diagrams Figure 8-21 Intern al Components of 250-sheet Module (1 of 2) 1 2 3 4 5 6 7 8 9 10 11 6 12 13 3[...]

Illustrations and Parts Lists 8-43 T able 8-24. Internal Components of 250-sheet Module (1 of 2) Item No. Part No. Quantity Description 1 XA9-0870-000CN 1 Screw , M4x10, Feed Modules 2 RG5-2677-000CN 1 Cov er Assembly , F eeder , Upper Right 3 RS5-1309-000CN 2 Bear ing, T ranspor t Roller 4 XD9-0135-000CN 1 E-Clip 5 RB1-8923-000CN 1 Roller , T rans[...]

8-44 Parts and Diagrams Figure 8-22 Intern al Components of 250-sheet F eeder (2 of 2) 1 2 3 4 5A 6 7 5B 8[...]

Illustrations and Parts Lists 8-45 T able 8-25. Internal Components of 250-sheet Feeder (2 of 2) Item No. Part No. Quantity Description 1 RG5-2679-000CN 1 Cov er Assembly , Feeder , Right Lower 2 RG5-2680-000CN 1 Cov er Assembly , Feeder , Left Lower 3 RB1-8907-000CN 1 Cov er , Feeder PCA 4 RG5-2685-000CN 1 Feeder , Control PCA 5A RB1-9033-000CN 1 [...]

8-46 Parts and Diagrams Figure 8-23 Upper P aper Pick up Drive Assembly 1 2 T able 8-26. Upper Paper Pic kup Drive Assembly Item No. P ar t No. Quantity Description 1 RG5-2683-000CN 1 Upper P aper Pickup Drive Assemb ly (250-sheet) 2 RB1-8910-000CN 1 Arm, T ra y Sensing[...]

Illustrations and Parts Lists 8-47 Figure 8-24 Low er P aper Pickup Driv e Assembly 1 2 T able 8-27. Lower P aper Pickup Drive Assemb ly Item No. Part No. Q uantity Description 1 RG5-2684-000CN 1 Lower P aper Pick up Drive Assembly (250-sheet) 2 RB1-8910-000CN 1 Ar m, T ra y Sensing[...]

8-48 Parts and Diagrams Figure 8-25 250-sheet T ray 1 2 3 4 5 6[...]

Illustrations and Parts Lists 8-49 T able 8-28. 250-sheet T ra y Item No. P art No. Quantity Description 1 RF5-2505-000CN 1 each Mounting Assemb ly Separation Roller 2 RB1-9001-000CN 1 each Panel Roller Access 3 RF5-2490-000CN 1 each Roller 4 RB1-9009-000CN 1 each Paper Le vel Indicator 5 RB1-9012-010CN 1 each Left Ar m Lifter 6 RB1-9013-010CN 1 ea[...]

8-50 Parts and Diagrams Figure 8-26 Intern al Components of Optional 500-sheet Univ ersal T ray Assemb ly 1 2 3 4 5 6 7 8 9 10 11 11 12 13 13[...]

Illustrations and Parts Lists 8-51 T able 8-29. Internal Components of Optional 500-sheet Universal T ray Assembly Item No. P ar t No. Quantity Description 1 XD2-1100-502CN 1 Ring, E 2 RG5-2690-000CN 1 P aper Pickup Driv e Assembly , Optional (500-sheet) 3 RB1-8865-000CN 4 Roller 4 VS1-6174-000CN 1 Connector 5 RB1-8928-000CN 1 T ray Identifier Plun[...]

8-52 Parts and Diagrams Figure 8-27 Optional 500-sheet Universal T ray Assemb ly 4 1 2 3 5 6 8 7[...]

Illustrations and Parts Lists 8-53 T able 8-30. Optional 500-sheet Universal T ray Assembl y Item No. P art No. Quantity Description 1 RF5-2489-000CN 1 Separation Roller Mounting Assemb ly 2 RB1-9374-000CN 1 Stopper 3 RS5-2981-000CN 1 Spring 4 RB1-9371-000CN 1 Plate 5 RF5-2490-000CN 1 F eed Roller 6 RB1-9009-000CN 1 Paper Le vel Indicator 7 RB1-896[...]

8-54 Parts and Diagrams Figure 8-28 Env elope Feeder 1 2 4 3[...]

Illustrations and Parts Lists 8-55 T able 8-31. En velope Feeder Item No. P ar t No. Exchange No. Quantity Description 1 C4122A C4122-69001 1 Env elope Feeder 2 RB1-9088-000CN 1 T ra y , Env elope Feeder 3 RF5-2511-000CN 1 W eight, Env elope 4 RB1-9095-000N 1 Mount, Env e lope W eight[...]

8-56 Parts and Diagrams Figure 8-29 Intern al Components of Duple x er 2 3 4 5 6 1[...]

Illustrations and Parts Lists 8-57 T able 8-32. Internal Components of Duplexer Item No. Part No. Exchange No. Quantity Description 1 C4123A C4123-69001 1 Duplex er 2 RB1-9044-000CN 1 Cov er , T op 3 RB1-9047-000CN 1 Cov er , Right Duple xer 4 RF5-1876-000CN 1 Cover , Left with Connector 5 RB1-9045-000CN 1 P anel, Rear 6 RH7-1361-000CN 1 F an[...]

8-58 Parts and Diagrams Alphabetical P arts List T able 8-33. Alphabetical Parts List Description P ar t Number T able Number and P age 250-sheet Universal Replacement T ra y C4126A T abl e 8-1 on page 8-4 500-sheet P aper F eeder and Tr a y C4124A T able 8-1 on page 8-4 500-sheet Universal Replacement T ra y C4125A T abl e 8-1 on page 8-4 A C, P o[...]

Illustrations and Parts Lists 8-59 Cable , P aper Feed/T ra y 1 Pick up Solenoid RG5-3703-000CN T able 8-7 on page 8-15 Cable , Sensor RG5-3711-000CN T able 8-21 on page 8-37 Cable , T op Cov er Switch RG5-3705-000CN T able 8-7 on page 8-15 Cable , T ra y 1 Sensor RG5-3700-000CN T able 8-7 on page 8-15 Clip , Left Side P anel RB1-8848-000CN T able [...]

8-60 Parts and Diagrams Cov er Fe eder Right Assembly RG5-2668-000CN T able 8-21 on page 8-37 Cov er , Left with Connector RF5-1876-000CN T able 8-32 on page 8-57 Cov er , Right Duplex er RB1-9047-000CN T able 8-32 on page 8-57 Cov er , T op RB1-9044-000CN T able 8-32 on page 8-57 Cov er , T ray 1 Sensor Arm RB1-8788-000CN T able 8-13 on page 8-27 [...]

Illustrations and Parts Lists 8-61 F ont DIMM (8 MB Asian MROM) T raditional Chinese Simplified Chinese Euro C4292A C4293A C4210A T a ble 8-1 on page 8-4 F oot RB1-8107-000CN T able 8-21 on page 8-37 F or matter C4118-69008 (LJ 4000) C4251-69001 (LJ 4050) T able 8-4 on page 8-9 F rame , Right RB1-8915-000CN T able 8-29 on page 8-51 Fuser C4118-6900[...]

8-62 Parts and Diagrams Le vers, T ra y Sensing Lower RB1-9034-000CN T able 8-25 on page 8-45 Le vers, T ra y Sensing Upper RB1-9033-000CN T able 8-25 on page 8-45 Lower P aper Pickup Drive Assembly (250-sheet) RG5-2684-000CN T able 8-27 on page 8-47 Lower T ra y Logic PCA RG5-3821-000CN T able 8-29 on page 8-51 Macintosh Computer Serial Cable 9221[...]

Illustrations and Parts Lists 8-63 P aper F eeder Cable RG5-3822-000CN T able 8-29 on page 8-51 P aper Pickup Driv e Assembly , Optional 500-sheet T ra y RG5-2690-000CN T able 8-29 on page 8-51 P aper Pickup Driv e Assembly (500-sheet) RG5-2672-000CN T able 8-22 on page 8-39 P aper Stop , 500-sheet T ra y RF5-2670-000CN T a ble 8-23 on page 8-41 P [...]

8-64 Parts and Diagrams Roller , T ranspor t Pressure RB1-8922-000CN T able 8-24 on page 8-43 Screw , M3x16, F eed Modules XA9-0917-000CN T able 8-21 on page 8-37, T abl e 8-24 on page 8-43, and T abl e 8-25 on page 8-45 Screw , M3x4, washer head XA9-0434-000CN T able 8-2 on page 8-6 Screw , M3x6, washer head XA9-0267-000CN T able 8-2 on page 8-6 S[...]

Illustrations and Parts Lists 8-65 Spring, Leaf RB1-8927-000CN T able 8-29 on page 8-51 Spring, Pickup RS5-2632-000CN T able 8-22 on page 8-39 Spring, Rear T ra y Latch RB1-8847-000CN T able 8-6 on page 8-13 Spring, Separation Roller T ension RS5-2622-000CN T able 8-23 on page 8-41 Spring, Shutter RB1-8702-000CN T able 8-8 on page 8-17 Spring, T on[...]

8-66 Parts and Diagrams T ra y , Rear Extension RB1-8844-000CN T able 8-5 on page 8-11 Upper P aper Pickup Driv e Assembly (250-sheet) RG5-2683-000CN T able 8-26 on page 8-46 W eight, Env elope RF5-2511-000CN T able 8-31 on page 8-55 T able 8-33. Alphabetical Parts List (continued) Description P ar t Number T able Number and P age[...]

Illustrations and Parts Lists 8-67 Numerical P ar ts List T able 8-34. Numerical Parts List P ar t Number Description T able Number and P age 92215N Macintosh Network Cable Kit T able 8-1 on page 8-4 92215S Macintosh Computer Ser ial Cable T able 8-1 on page 8-4 C2809A Seri al adapter 25-9 Pin Adapter (male/f emale) T a ble 8-1 on page 8-4 C2932A C[...]

8-68 Parts and Diagrams C4127A T oner Car tridge (6,000 Pages) T able 8-1 on page 8-4 C4127X T oner Car tridge (10,000 pages) T abl e 8-1 on page 8-4 C4135-67901 C4136-67901 C4137-67901 EDO DIMM 4 MB 8 MB 16 MB T abl e 8-1 on page 8-4 C4140-67901 C4141-67901 C4142-67901 C4143-67901 SDRAM DIMM 4 MB 8 MB 16 MB 32 MB T abl e 8-1 on page 8-4 C4251-6900[...]

Illustrations and Parts Lists 8-69 RB1-8690-000CN Retainer , T oner Sensing Spring T able 8-8 on page 8-17 RB1-8693-000CN Spr ing, T o ner Car tridge Drum Ground T a ble 8-8 on page 8-17 RB1-8694-000CN Strap, Interloc k Suppor t Ground T a ble 8-7 on page 8-15 RB1-8695-000CN Spr ing, T o ner Sensing T able 8-8 on page 8-17 RB1-8700-000CN Laser Shut[...]

8-70 Parts and Diagrams RB1-8858-000CN Panel, F or matter Cover T able 8-5 on page 8-11 RB1-8860-000CN Clip, Right Side P anel T able 8-5 on page 8-11 RB1-8862-000CN Guide, Formatter/cp Cable T able 8-7 on page 8-15 RB1-8865-000CN Roller , Pickup T able 8-22 on page 8-39 RB1-8873-000CN Suppor t, Paper Guide T able 8-21 on page 8-37 RB1-8877-000CN C[...]

Illustrations and Parts Lists 8-71 RB1-9044-000CN Cover , T op T able 8-32 on page 8-57 RB1-9045-000CN Panel, Rear T able 8-32 on page 8-57 RB1-9047-000CN Cover , Right Duplex er T a ble 8-32 on page 8-57 RB1-9088-000CN T ray , Envelope F eeder T able 8-31 on page 8-55 RB1-9095-000CN Mount, Envelope W eight T able 8-31 on page 8-55 RB1-9371-000CN P[...]

8-72 Parts and Diagrams RG5-2645-000CN Suppor t, T op Cover , Right T able 8-7 on page 8-15 RG5-2648-000CN Delivery Assembly T able 8-7 on page 8-15 and T abl e 8-18 on page 8-33 RG5-2650-000CN Delivery Sensor Ar m Assembly T able 8-18 on page 8-33 RG5-2651-000CN Paper F eed Assembly T able 8-12 on page 8-25 RG5-2652-070CN Registration Assembly T a[...]

Illustrations and Parts Lists 8-73 RG5-2685-000CN Feeder , Control PCA T able 8-25 on page 8-45 RG5-2688-000CN Left Fr ame Assembly T able 8-29 on page 8-51 RG5-2690-000CN Paper Pic kup Drive Assemb ly , Optional 500-sheet T ra y T able 8-29 on page 8-51 RG5-3693-000CN (110V) RG5-3694-000CN (220V) Engine Controller Board T able 8-10 on page 8-23 RG[...]

8-74 Parts and Diagrams RH7-5172-000CN Solenoid, T ra y 1 Drive T able 8-13 on page 8-27 RS5-0911-000CN Gear , Coupler T able 8-9 on page 8-21 RS5-0946-000CN Gear , T ranspor t Roller T able 8-24 on page 8-43 RS5-1179-000CN Bear ing, T ransport Roller T able 8-29 on page 8-51 RS5-1309-000CN Bear ing, T ransport Roller T able 8-24 on page 8-43 RS5-2[...]

Index-1 Inde x Numerics 250-sheet tray, paper specifications 1-13 500-sheet tray, paper specifications 1-12 A AC/DC power distribution 5-2 accessories 8-4 assemblies Delivery 8-32 Delivery Drive 6-41, 8-24 Engine Controller Board 8-22 Fan 6-24 Formatter Cage 6-20 Fuser 6-18, 8-34 Gear Train 6-40 Laser Scanner 6-23 locations of 8-8 Main Motor 6-25 O[...]

Index-2 Engine Controller Board Assembly 8-22 removing and replacing 6-44 engine controller subsystem 5-6 Engine Module 6-42 engine test 7-11 Envelope Feeder 5-44 envelopes 1-20 environmental product stewardship 1-28 error messages 7-17 Event Log 7-13 F Fan, removing and replacing 6-24 500-sheet tray, paper specifications 1-12 Formatter Cage Assemb[...]

Index-3 Paper Pickup Drive Assembly 8-38 Paper Pickup Drive assembly lower 8-47 upper 8-46 paper specifications card stock 1-23 envelopes 1-20 guidelines for using paper 1-16 heavy paper 1-23 labels 1-19 supported types 1-15 transparencies 1-19 weight equivalence 1-18 parts 2-3 parts lists alphabetical 8-58 how to use 8-2 numerical 8-67 PCA Control[...]

Index-4 T testing, engine 7-11 thermistor 7-102 timing diagrams 7-110 toner cleaning spilled 4-4 consumption 1-28 toner cartridge 2-9, 5-22, 5-24 detection 5-5 recycling 2-9 refilled 2-9 Toner Cartridge Drive Arm, removing and replacing 6-9 tools 6-3 Top Cover Assembly 8-12 removing and replacing 6-7 top margin adjustment 6-46 training media 2-4 Tr[...]

Wiring Diagram (HP LaserJet 4000/4000N) Printer controller PC A Fuser paper delivery sensor 1 Control Panel Duplexing unit driver PCA Duplexing unit PS 106 Fuser paper delivery sensor 2 Fuser T oner car tridge Laser/scanner unit Scanning motor BD PCA Laser driver En velope feeder En velope feeder driver PCA Video controller Paper feeder driver PCA [...]

Wiring Diagram (HP LaserJet 4000 T/4000TN) Printer controller PC A Fuser paper delivery sensor 1 Control Panel Duplexing unit driver PCA Duplexing unit PS 106 Fuser paper delivery sensor 2 Fuser T oner car tridge Laser/scanner unit Scanning motor BD PCA Laser driver En velope feeder En velope feeder driver PCA Video controller Paper feeder driver P[...]

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HP LaserJet 4000 and 4050 Series Printers Service Manual HP LaserJet 40 00 and 4050 Series Prin ters Service Manual Printed on at least 50% T otal Recycled Fiber with at least 10% Post-Consumer Paper Copyright© 1999 He wlett-Packard Co. Printed in USA Manual Part No. C4251-91003 *C4251-91003* *C4251-91003* C4251-91003[...]