HP (Hewlett-Packard) 5L manual

Printed on Recycled P aper *C3990-90991* *C3990-90991* C3990-90991 HP LaserJ et 5L and 6L Printer Ser vice Manual Copyright© 1997 He wlett P ackard Co. Printed in USA 9/97 Manual Part No. C3990-90991 HP LaserJet 5L and 6L Printer (C3941/C3990) Service Manual[...]

Service Manu al HP LaserJet 5L HP LaserJet 6L (C3941A) (C3990A)[...]

© Copyright He wlett-Packard Company 1997 All Rights Reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. Publication number C3990-90991 First edition, May 1997 W arranty The information contained in this document is subject to change without notice. Hewlett-[...]

Con ventions This man ual uses the following con ventions: Color is used to em phasize items which are im portant to the m aterial under discussion. The nam es of major printer parts and assemb lies are CAPIT ALIZED . Bold is used for emp hasis, particularly in situations wher e italic type would be confusing. Italic type is used to indicate relate[...]

Chapter Descrip tions 1 Product Inf ormation Orientation to the printer, as well as the service and repair philoso phy , is discussed . Informatio n on obtaining assistance and warranty is also here. 2 Site Requirements Here are recomm endations pertainin g to installation requir ements. 3 Operating Overview This chapter has detailed info rmation a[...]

List of Figur es Figure 1-1 HP LaserJet 5L Mo del and Serial Num bers . . . . . . . . . . . . 1-4 Figure 1-2 HP LaserJet 6L Mo del and Serial Num bers . . . . . . . . . . . . . 1-5 Figure 1-3 Front/Sid e V ie ws of the Prin ter . . . . . . . . . . . . . . . . . . 1-7 Figure 1-4 Front Door Assemblies . . . . . . . . . . . . . . . . . . . . . . 1-8 F[...]

Figure 6-24 Pickup Roller Assembly Removal (2 of 2) . . . . . . . . . . . 6-28 Figure 6-25 Paper Pickup Rolle r Assembly Replacement (Inside/Front V ie w) 6-29 Figure 6-26 Paper Feed Frame Removal (1 of 4) . . . . . . . . . . . . . . 6-30 Figure 6-27 Paper Feed Frame Removal (2 of 4) . . . . . . . . . . . . . . 6-31 Figure 6-28 Paper Feed Frame Rem[...]

List of T ables T able 1-1 Printer Fea tures . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 T able 1-2 Paper Capacities and Sizes . . . . . . . . . . . . . . . . . . . . 1-3 T able 1-3 Perform ance Specifications . . . . . . . . . . . . . . . . . . . . 1-6 T able 1-4 Electrical Sp ecifications . . . . . . . . . . . . . . . . . . . . . . 1-[...]

viii[...]

1 Pr odu ct Inf orm ation Contents Printer Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Paper Capacities and Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Model and Ser ial . . . . . . . . . . . . . . . . . . . [...]

1-2 Product Info rmation[...]

Printer F eatures Paper Capacities and Sizes Features Description s Print Speed 4 ppm (HP LaserJet 5L); 6 ppm (HP LaserJet 6L) T e xt & Graphics Res olution 300 or 600 dpi Printer Language Enhanced PCL 5 Monthly Usage (pages) 4,000 pages (HP LaserJet 5L); 6,000 pages (HP LaserJet 6L) Memor y: Standard 1 Maximum Memory Capacity 1 Mbyte RAM 9 Mby[...]

Identif ication Model and Serial The model num ber and serial numbers are listed on identification labels located on the bottom of the printe r . The model num ber is alphanum eric, such as C3941A for the HP LaserJet 5L printer, and C3990A for the HP LaserJet 6L prin ter . The serial number contain s information abo ut the Country of Orig in, the R[...]

HP LaserJet 6L Model and Serial Numbers Figure 1-2 1 Product Information Product Info rmation 1-5[...]

Specif ications Category Specificat ion Print Speed*: HP LaserJet 5L Print Speed*: HP LaserJet 6L 4 ppm 6 ppm Monthly Usage (Duty Cycle): HP LaserJet 5L Monthly Usage (Duty Cycle): HP LaserJet 6L 4,000 pages 6,000 pages Lif e Expectancy of T oner Car tridge (pages)** 2,500 pages @ 5% co verage First Print A4 <23 seconds Letter <23 seconds * A[...]

Pr oduct Over view Front/Side Views of the Printer 1. P aper Input Suppor t 7. F ront Panel Button 13. F ront Output Slot (fac e-up) 2. P aper Output Suppor t 8. P aper Output Bin 3. P aper Guides 9. P aper Path Le ver 4. Error (top) Light 10. Serial and Model Number (under printer) 5. Data (middle) Light 11. P aper Input Bin 6. Ready (bottom) Ligh[...]

Front Door Assemblies 14. P aper Release Lever 16. T ransf er Roller (do not touch) 15. T oner Car tridge Compar tment 17. EP Door Figure 1-4 1-8 Product Info rmation[...]

Back View of the Printer 18. P ower Cable Connector 20. Memory Expansion Cov er 19. P arallel Cable Connector Figure 1-5 I 1 Product Information Product Info rmation 1-9[...]

Service A ppr oach Repair of the printer normally begins with the use of the prin ter’ s internal diagnostics in conju nction with the troubleshootin g procedures in Cha pter 7. Once a faulty part is located, repair is generally accom plished by assembly level replacement of Field Repla ceable Units (FRUs). Some mechanical assem blies may be repa[...]

Description Part Number PDO PCE HPD HP LaserJet F amily Quick Reference Service Guide 5021-0369 X X HP LaserJet 5L Printer User’ s Manual C3941-90901 X HP LaserJet 6L Printer User’ s Manual C3990-90901 X HP PCL5 Printer Language T echnical Ref erence Inf ormation P ac kage 5010-3994 X X HP LaserJet Printer F amily P aper Specifications Guid e 5[...]

T echnical Assistance Online Services: fo r 24-hour access to inf ormation ov er your modem, we suggest these services. W orld Wide Web URL —Printer drivers , updated HP printer softw are, and product and suppor t inf ormation ma y be obtained from http://www .hp .com, or in Europe from http://www2.h p.com. In Japan printer drivers may be obtaine[...]

W orldwide Support U.S. and Canada: Customer Support & Product Repair Assista nce (Please refer to the warranty chapter of this manual for addi tional product repai r informa tion.) Call (208) 323-2551 Mon-Fri 6 am to 10 pm and Saturday 9 am to 4 pm (Mountain Time) free of charge during the Warranty P eriod; howev er , your standard long-distan[...]

W arranty This warranty gives you specific le gal rights. Y ou m ay also have other rights, which may vary from area to area. Hewlett-Packard warrants the 5L and 6L Laser Jet printers against defects in materials and workm anship for a period of one year fro m the date of purchase by the end user and is not transferable. During the warranty perio d[...]

If you are using a mechanical switchb ox, ensure that it is equipped with a surge protector . Dam age to your printer could occur from the use of unprotected mechanica l switchboxes. The warranty perio d begins either on the date of delivery or , where the purch ase price includes installation by Hewlett-Packard, on the date of installation . W arr[...]

1-16 Prod uct Inform ation[...]

2 Site Req uirements Contents Site Requirem ents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Operating Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Printer Space Requirem ents . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 The HP C3906A /F T oner Cartrid ge . . . . . . . . . . . . . . . [...]

2 -2 Site Requirem ents[...]

Site Requir ements Operating En vironment The environmental requiremen ts listed in the table below must be maintained to ensure the pro per operation of this printer . Consider the following poin ts before installing the printer: • Install in a well-ventilated, dust- free area. • Install on a hard, flat and con tinuous surfac e , with all four[...]

Printer Space Requirements Printer Space Requirements Figure 2-1 Description Dimension Width 13.2 in. (335.5 mm) Depth 12.3 in. (311.2 mm) Height (stor age) (operational) 8.9 in. (227.5 mm) 14.6 in. (372.7 mm)* W eight (with toner ca r tridge) 15.9 lbs. (7.2 kg) T oner ca r tridge weight** 1.5 lbs. (.7 kg) * With letter input assembly extended. ** [...]

The HP C3906A/F T oner Cartridge T oner cartridges contain com ponents that are sensitive to light, temp erature, and humidity . Follow the recommendations in this section to ensure the high est quality and longest life of HP tone r cartridges. Keep the printer within the following en vironmen tal conditions for optim um perform ance. Storage Condi[...]

T oner Cartrid ge Handling Sugge stions • Before installing a cartrid ge, distribute the tone r evenly by rotating the cartridg e back and forth five to six tim es. (See Figure 2-2.) Repe at this action when toner begins to run low . Toner Cartridge Distribution • Do not touch the surfac e of the photosensitive drum in the cartridg e. Protect t[...]

3 Operating Overview Contents Using the Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 Control Panel La yout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 LED Lig hts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 The Fron t Panel Button . . . . . . . . . . . . . . . . . . . . . [...]

3-2 Operating Overview[...]

Using the Control Panel Control Panel Layout The Con trol Panel consists of three status lights and a Front Panel Butto n located at the front of the printer . The Control Panel consists of one button and three status lights. ERROR (Y ellow) DA T A (Green) READY (Green) + These lights can be in only one of the following states: + OFF ON Blinking 3 [...]

LED Lights The LED lights provide a quick way to check the printer’ s status. When this Indicator: Looks like this: It means this: Do this: On Blinking Ready Ready to print. Print job in progress . Let job finish printing. On Form Feed There is unprinted data in the buff er. Briefly press the F ront Panel Button to print the remaining data. Blink[...]

When this indicator: Looks like this: It means this: Do this: Blinking Err or (light blinki ng) P age T oo Complex The page may be too compl ex for the printer’ s memory capacity or the printer may not be ab le to create the image fas t enough to keep pace with the engine printing process . Briefly press and release the F ront P anel Button to co[...]

The Front Panel Button Depending on what state the printer is in, pressing the Front Panel Butto n allows you to control printing tasks by either starting or resuming a printer fun ction. Use the Front Panel Button to accom plish the following tasks: Function Lights Action Result W ake Up All lights are off while plugged into power source. Briefly [...]

Printing a Self-T est Page A self-test page can be useful in troubleshooting printer problem s and determining which fon ts hav e been downloaded to the printer . Self-test Page for HP LaserJet 5L Figure 3-1 3 Installa tion and Configur ation Operating Overview 3-7[...]

Self-test Page for HP LaserJet 6L The self-test page lists the curr ent printer configuration. (If any fonts have been downloaded to the printer a second page will print.) T o print a self-te st page: 1 Make sure the Ready (bo ttom) Light is on, and all other lights are off. W ake up the printer if necessary by pressing the Front Panel Button. 2 Br[...]

Continuou s Self T est A continuous self test can be usefu l for troubleshooting paper path and other problem s. T o prin t a continuous self test: 1 Disconnect the printer from the power source. 2 Press and hold down the Front Panel Button while con necting power . 3 Continue hold ing the button for about fi ve seconds. All lights will illuminate [...]

Printing an Engin e T est The engine test prin t can be used to verify that the print engine is functioning correctly . The Formatter PCA is completely bypassed durin g an engine test. Consequently , this test is useful for isolating engine prin ter problems. The engine test prints a full page of vertical lines down the entire printable area. This [...]

Resetting the Printer Resetting the printer accom plishes the following: • Clears all data from the prin ter’s memor y (including unpr inted data, download ed fonts, and macros). • Stops any printing that is taking place and ejects the page. • Removes some erro r conditions. • Resets the printer to its factory default settings. T o Reset [...]

3-12 Operating Overview[...]

4 Printer M aintenance Contents Life Expectancy of Consu mables . . . . . . . . . . . . . . . . . . . . . . . . 4-3 T oner Cartridge Lif e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 Saving T oner with EconoMode . . . . . . . . . . . . . . . . . . . . . . . 4-4 Refilled T oner Cartridges . . . . . . . . . . . . . . . . . . . . .[...]

4-2 Printer Ma intenance[...]

Life Expectancy of Consum ables Always inspect the components listed in T able 4-1 for wear when servicing the printer . Replace these com ponents as needed, based on printer failures or wear , not strictly on usage. Description HP LaserJet 5L Part Number HP LaserJet 6L Part Number Est Life (pgs) Remarks T oner Car tridge (user replaceab le) C3906A[...]

T oner Cartridge Life The toner cartridg e has been designed to simplif y the replacemen t of the printer’ s major “consu mable” parts. Th e toner cartridge conta ins the printing mechanism and a supply of toner . When using a typical word-processing application, a toner cartridge will print appro ximately 250 0 pages where the text covers ab[...]

proofs. Eco noMode can be set throu gh your printer driver . See Chapter 3 for informa tion. Notes Some software applicatio ns may refer to this as “draf t mode." Ref illed T oner Cartridges While Hewlett-Packard does not pro hibit the use of refilled toner cartridges during the warranty period or while und er a maintenance con tract, we do [...]

Cleaning the Printer T o main tain the print quality, thorough ly clean the printer: • Every time you change the toner cartrid ge. • After printin g approxim ately 2,500 pages. • Whenev er print quality problems occur. Clean the outside of the printer with a lightly water-dampene d cloth. Clean the inside with only a dry , lint-free cloth. Ob[...]

Cleaning Printer Comp onents CAUTION T o avoid permanen t damage to the toner cartridge, do not use am monia-based cleaners on or arou nd the printer . Do not touch the transfe r roller with your fingers. Contam inants on the roller can cause print quality prob lems. COMPONE NT CLEANING METHOD/NOT ES Outside Covers Use a water-dampened cloth. Do no[...]

Static Eliminator Teeth (located in front of the transfer roller) Cleaning Sp illed T oner Defective toner cartridges can develop leaks. In addition, after a paper jam has occurred, there ma y be some toner rem aining on the rollers and guid es inside the printer . The pages that print im mediately after the jam may pick up this toner . Clean spill[...]

5 Functional Overview Contents Basic Printer Fu nctions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 DC Controller/P ower System . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4 Print Eng ine Control System . . . . . . . . . . . . . . . . . . . . . . . . . 5-5 Power System (on DC Controller PC A) . . . . . . . . . . . . . . [...]

5 - 2 Functional Overview[...]

Basic Printer Fu nctions This chapter presen ts a generalized func tional overvie w of the printer and the printing processes. The following printe r systems are discussed: • DC Controller System / Power Sy stem • Formatter Sy stem • Image For mation System • Paper Feed System • Laser/Scann er System Figure 5-1 is a generalized block diag[...]

DC Controller/P ower System The DC Controller PCA coordinates all print engine activities, drives the laser, and coordinates prin t data from the Formatter PCA with the imag e formation pro cess. The DC Controller also includes both A C and DC po wer supply and distribution circuitry . The DC Controller con trols the following systems and functions[...]

Print Engine Control System Laser and Scanne r Drive Based on informa tion received from the Formatter , the DC Controller sends signals to the Laser/Scan ner Assembly to modulate the laser diod e ON and OFF and to drive the La ser/Scanner m otor . Refer to “Im age Formation System ,” later in this chapter for mo re informatio n. Paper Motion M[...]

P ower System (on DC Contr oller PCA) The A C, DC, and high voltage po wer supply circuits are all contained within the DC Controller PCA . AC Power Distr ibution The AC power circuitry supplies A C voltage whenever the power cord is connected to the A C power source. A C voltage is distributed to the DC po wer supply circuitry and to the A C drive[...]

The printe r exits SleepMode and all of the lights power on when any of the following occur: • A job is received. • The Front Pan el Button is pressed. • The printer fron t door is opened. Note The printe r will not enter SleepMo de if there is a printer error . High Volta ge Power Distribution The High V oltage Power Su pply PCA applies an o[...]

F ormatter System The Formatter PC A is responsible for the following: • Receiving and processing print data from the printer interfa ce. • Monitorin g Front Pane l Button and relaying prin ter status informatio n. • Developing and coord inating data placem ent and timing with the print engin e. • Storing font inform ation. • Commun icati[...]

Control Panel Status LED Lights The Forma tter uses three LEDs mo unted under the printer cover to commu nicate printer status to the user . Refer to “Usin g the Control Panel” in Chap ter 3 and “Printer Erro r T roubleshoo ting” in Chapter 7 for m ore information on the lights. Front Panel Butto n The Forma tter PCA is connected to a micr [...]

EconoMode The EconoM ode setting uses approxim ately 50% less toner than standard mode printing by reducin g the dot density . Howe ver , EconoM ode does not extend toner cartridge com ponent life. Eco noMode, which can also be thou ght of as “draf t mode,” is user-selectable through som e software applications. Th e default setting is Off. Eco[...]

Enhanced I/O The En hanced I/O feature allows printer mem ory to be used for storing data received from the host computer . When En hanced I/O is enabled, you can send more data to your prin ter in shorter amo unts of time, which allows you to return to your applica tion sooner . Enh anced I/O has the following options: • Auto — allows the prin[...]

Image F ormation System Laser printing requ ires the interaction of several dif ferent techn ologies (such as electronics, optics, and electrophotog raphics) to provide a printed page . Each process functions indep endently and mu st be coordinated with the other printer processes. Image form ation consists of six processes: • Step 1. Drum Cleani[...]

T oner Cartridge As the “heart” of the Image Form ation System, the toner cartridg e houses the cleaning, cond itioning, and developing steps of the process. The toner cartridge contains the pho tosensitive dru m, primary charging roller, de veloping station, toner cavity , and cleaning station. Including these componen ts, which wear, degrade,[...]

Step 4: Image Developing At this stage of the process, the latent electrostatic image is present on the dru m. The toner particles obtain a negative surface charge by rubb ing against the developing c ylind er which is conn ected to a negative DC supply . The negati vely charged toner is attracted to the discharged (exposed, grounded ) areas of the[...]

Paper Feed System Both the Paper Input Bin and the Sing le Sheet Input Slot merge into one, m ain input area. Paper placed in either of these areas enab les the Paper Out Sensor (sensor 202), whic h informs the DC Contr oller that paper is present. When the prin ter receiv es a print job and is ready to print, the DC Contr oller enables the Laser/S[...]

Figure 5-5 shows a simplified paper path and the locatio ns of the photosensors and rollers. Simplified Paper Path Figure 5-5 5 - 16 Functional Overview[...]

Figure 5-6 shows the locations of the photosensors, switches, solenoid , and other importan t printer elements. T able 5-1 describes the function of each photo sensor and the solenoid. Solenoid and Sensors Figure 5-6 No. Name Description SL1 P aper Pick-up Sol enoid Enable s the P aper Pickup Roller . PS201 P aper Exit Sensor Senses when paper has [...]

Paper J am Detection The Paper Out Sensor (PS 202), Paper Registration Sensor (P S203), and the Paper Exit Sensor (PS 201) detect when paper is moving through the printer . (See Figu re 5-5 for roller and sensor locations.) If a pape r jam is detected, the DC Controller immediately stops the printin g process and causes a paper jam indic ation on t[...]

Basic Sequence of Operation The Forma tter PCA and the DC Controller PC A share informatio n during prin ter operation. The DC Con troller-to-Formatter Connector (J201) forms a link which operates as a serial data bus. This allows printer status, command informa tion, and dot-imag e data to be passed between the two PCA s. Figure 5-7 shows the gene[...]

General Timing Diagram - HP LaserJet 5L Figure 5-7 5 - 20 Functional Overview[...]

General Timing Diagram - HP LaserJet 6L Figure 5-8 5 Functional Overvi ew Functional Overview 5 - 21[...]

5 - 22 Functional Overview[...]

6 Remov al and Replacemen t Contents Removal and Replacement Strategy . . . . . . . . . . . . . . . . . . . . . . . 6-3 Required T ools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4 Installing Memor y Cards (DRAM ) . . . . . . . . . . . . . . . . . . . . . . . 6-5 Covers and Doors . . . . . . . . . . . . . . . . . . . . . [...]

6 - 2 Removal and Replacement[...]

Remov al and Replacement Strategy This chapter doc uments rem ov al and replacement of Field Replac eable Units (FR Us) only . Exchange assemb lies should be sent to SMO for repa ir . Replacem ent is generally the reverse of removal. Occasionally , notes are included to provide direction for difficult or critical replacement proced ures. WARNING! U[...]

Required T ools • #2 Phillips screwd river with a magnetic tip • 5.5 mm hexhea d nutdriver • small flathead screw driver • needlenose pliers Cautio n A Posidriv scre wdriver will damage the printer’ s screw heads. Use Phillips only . Figure 6-1 shows the difference between a Phillips and a Posidriv screwdri ver . Note that a Phillips tip [...]

Installing Memory Cards (DRAM) 1 Unplug the pow er cord from the printer . You should not install a mem ory card while the printer is in SleepMode. 2 Open the Printer Doo r, remove the toner cartridge, and close the Prin ter Door. Pro tect the toner cartridge from light while you are working on the printer. 3 Remove any pape r in the paper tray. Ge[...]

Cov ers and Doors Back Cover 1 Unplug the power cord and rem ove the parallel cable from the back of the printer . 2 Remove the toner cartridg e. 3 Lift the Input Exten der assembly . Cautio n Y ou m ust lift the Input Extender when the cov ers are removed or it will break. After you have removed the cov ers, leav e the Input Exten der in this lift[...]

5 Separate the rear pane l from the main cover , pulling the lower corners away from the printer first. Then, insert the small flathead scre wdriver into the open ings at the top to pop the upper corner s (Figure 6-3, callout 1). 6 Remove the cover by grabbing it on both sides and pulling it straight back with a firm pull (Figure 6-3, callout 2). B[...]

EP Door Assemb ly 1 Unplug the power cord and rem ove the parallel cable from the back of the printer . 2 Open the EP doo r . 3 Remove the toner cartridg e. 4 Along the door hinge, there is a flex point. Firm ly press the left tab inward to release it. The right tab will fall out easily (Figure 6-4). EP Door Assembly Removal Figure 6-4 6 - 8 Remova[...]

Memory Door 1 Unplug the power cord and remove the parallel cable fro m the back of the printer . 2 Remove the toner cartridge. 3 Gently tip the printer onto its side so that the Control Panel is on top. 4 Carefully pull the door tab out (Figu re 6-5, callout 1) and away from the printer in a gentle rocking m otion (Figure 6-5 , callout 2). Memory [...]

Main Cover and P aper Input Assembly 1 Remove the toner cartridg e. 2 Remove memory door . Cautio n Remove the memo ry door first. The door will break if you rem ove the Ma in Cov er without rem oving the memory door . 3 Remove the EP Door Assembly . 4 Remove the Back Cover . 5 Remove the (2) screws from the top of the printer (Figu re 6-6, callout[...]

Inter nal Assemblies Control Panel 1 Remove the Printer Covers. 2 Use the needlenose pliers to release the Contr ol Panel connector (F igure 6-7, callout 1). 3 Press the tab on the top of the Control Panel downward (Figure 6-7, callout 2). The Control Panel will pop out of the printer chassis. 4 Lift the Control Panel out. Control Panel Removal Fig[...]

Exit Roller Assembly 1 Remove Printer Covers. 2 Grasp both tabs at the lower ends of the Exit Roller bushings and pull inward. This will release the tabs from the prin ter chassis (Figure 6-8, callout 1). 3 Rotate the tabs 90 degrees, clear of the printer chassis (Figure 6-8, callout 2). 4 Lift the roller out. Exit Roller Removal To reinstall The e[...]

Delivery Assembly 1 Remove the Pr inter Covers and Exit Ro ller Assembly . 2 Remove the EP Right-Han d assembly by pressing the tab in (Figu re 6-9, callout 1) and sliding the assembly toward the front of the printe r (Figure 6-9 , callout 2). Note The EP Right-Han d assembly m ust be removed to access any fuser components. Delivery Assembly Remova[...]

3 Use the magnetic screwdriver to remove the (2) scre ws (Fig ure 6-10, callout 1). Once the screws have been removed, rotate the rear of the Deli very Assembly up and forward and lift it out of the printer . Delivery Assembly Removal (2 of 2) Note Upon reinstalla tion, the tabs on the front end of the Delivery Assembly must fit under the sheet me [...]

Fuser Pr essure Plate 1 Remove Printer Cov ers and Deliv ery Assembly (Figu res 6-9 and 6-10). 2 Remove the (2) screws (Figure 6-11, callout 1). 3 Press the Fuser Plate retainer clips out to release the Pressur e Plate (Figure 6-11 , callout 2). 4 Rotate the plate around and toward the back and lift up to remove it (Figure 6-11 , callout 3). Fuser [...]

To reinstall: The Fuser Pre ssure Plate is kept in place by four locking mechanism s in each corner . Place the rear slits in the plate over the rear brackets that hold the Fusing Assembly (Fig ure 6-12, callout 1). Lower the plate over the retaining clips, pressing on both sides of the Fuser Pressure Plate (Fig ure 6-12, callout, 2). It is importa[...]

Heating Element 1 Remove Printer Cov ers, Deli very Assembly (Figures 6-9 and 6-1 0), and Fuser Pressure Plate (Figu re 6-11). 2 Remove the wire cover (on the right side of the printer) for the Heating Elem ent wires by pressing in on the tab and pulling outward (F igure 6-13, callout 1). Heating Element Removal (1 of 3) Figure 6-13 6 Remov al and [...]

3 Disconnect the A C v oltage to the Heating Element by releasing the connector located on the DC Controller . Press down on the connector release with a small, flathead screwdri ver (Figure 6-14 , callout 1). (Since this is a small space, it is much easier to reach the connector with a screwdri ver .) Pu ll straight out (Figure 6-14 , callout 2). [...]

4 Remove the wire from the wir e guides along the right-side of the printe r . 5 Disconnect the therm istor feedback conn ector in the left front side of the Fusing Assembly (Figu re 6-15). Heating Element Removal (3 of 3) 6 Lift the Heating Element out. To reinstall Make sure the connectors are prop erly reattached. Figure 6-15 6 Remov al and Repl[...]

Pressur e Roller 1 Remove Printer Covers, Delivery Assembly (Figures 6-9 and 6-10) , Fuser Pressure Plate (Figure 6-11) , and Heating Element (Figu res 6-13 throu gh 6-15). 2 Remove the Pressure Rolle r guide by lifting the edge (Figure 6-1 6, callout 1) and then rolling it gently backward (Figu re 6-16, callout 2). Pressure Roller Guide Removal 3 [...]

F ace-Up /F ace-Down Lever 1 Remove Printer Cov ers, Deli very Assembly (Figures 6-9 and 6-1 0), Fuser Pressure Plate (Figure 6-1 1), and Heating Ele ment (Figures 6-13 thro ugh 6-15), and Pressur e Roller (Figure 6-16 ). 2 Rotate the le ver forward 90 degrees (past the spring) and pull it straigh t out the front of the printer . To reinstall 1 Mak[...]

Fuser Exit Roller Assemb ly 1 Remove Printer Covers, Delivery Assembly (Figures 6-9 and 6-10) , Fuser Pressure Plate (Figure 6-11) , and Heating Element (Figu res 6-13 throu gh 6-15), Pre ssure Roller (Figure 6-16 ), and Face-Up/Face-D own Le ver (Figure 6-17). 2 Remove the gear from the left end of the roller shaft by pressin g down on the catchin[...]

Paper Exit Sensor Flag 1 Remove the Printer Covers, Delivery Assembly (Figures 6-9 and 6-10), and Fuser Pressure Plate (Figu re 6-11). Caution Before procee ding to Step 2, examine the Paper E xit Sensor flag. It is important to note the position of the spring mech anism on the flag. The spring mu st be reinstalled to exactly this position. 2 Remov[...]

T op Assembl ies Laser/Scanner Assembly 1 Remove the Printer Covers. 2 Remove both Laser/Scan ner connectors (Fig ure 6-20, callout 1). 3 Remove all (4) screws and lift the assembly straight off (Figure 6-20, callout 2). Note One of the four screws is longer than the other three. Upon reinstallation , the longer screw must be replaced in its origin[...]

Solenoid 1 Remove the Printer Covers. 2 On the left side of the printer , remove the paper pickup gear (Figu re 6-21, callout 1) by pressing the tabs in the center of the gear outward and pulling the gear off (Figure 6-2 1). Solenoid Removal (1 of 2) Figure 6-21 6 Remov al and Replacement Removal and Replacement 6 - 25[...]

3 Remove the Solenoid conn ector (J204) from the DC Con troller (Figure 6-2 2, callout 1). 4 Remove the self-tapping screw that holds the Solenoid in place (Fig ure 6-22, callout 2). 5 Unthread the wires from the printer chassis. 6 Lift the Solenoid off. Solenoid Removal (2 of 2) Note When reinstalling this part, the Paper Picku p Gear is keyed to [...]

Pickup Roller Assembly 1 Remove the Printer Covers. 2 Remove the paper pickup gear (Figu re 6-21). Note This gear is ke yed to go on the shaft in only one way . 3 Remove the pickup roller gro unding clip on the right of the printe r by lifting each end of the clip up and over the two m etal guides and sliding the clip off. Figure 6-23 depicts the c[...]

4 Using needlenose pliers, pull the bottom of the bushing out (Figure 6-24 , callout 1), then turn it counter clockw ise to release it (Figure 6-24, callout 2). Pickup Roller Assembly Removal (2 of 2) 5 Lift the bushing out. 6 From inside the fron t of the printer , slide the right side of the Pick up Roller Assembly forward , then lift the left si[...]

To reinstall After placing the Picku p Roller shaft through on the left side, line up the Idler Roller tabs while repositioning the right side. Rock the shaft back and forth until the Pickup Roller and the Idler Rolle r tabs are correctly reinstalled. Note It is important that the Pickup Roller is placed back in with the two Idler Roller tabs up, s[...]

Paper F eed Fram e 1 Remove the Printer Covers. 2 Remove the Pickup Roller Assembly (Figures 6-23 throug h 6-24). 3 Disconnect the following: • Solenoid from the DC Controller at J204 (Fig ure 6-22, callout 1) • Two conn ectors from the Laser/Scanne r (Figure 6-2 6, callout 1) • Connector from To p Cover/E P Cartridge Senso r on HP LaserJet 5[...]

4 Release the catch on the control pane l cable guide by using the small flathead screwdri ver to push on the tab (Fig ure 6-27). Th en slide the guide off. Paper Feed Frame Removal (2 of 4) Figure 6-27 6 Remov al and Replacement Removal and Replacement 6 - 31[...]

5 Remove the self-tapping screw from the back sheet metal plate and lift it off (Figure 6-28, callout 1). 6 Remove the (4) hex head screws from the Paper Feed Frame (Figure 6-2 8, callout 2). Paper Feed Frame Removal (3 of 4) Figure 6-28 6 - 32 Removal and Replacement[...]

7 Release the sensor unit connector (Figu re 6-29). Paper Feed Frame Removal (4 of 4) 8 V erify that all cables are clear of the fram e and pull the fram e straight back to remove it. To reinstall The Paper Feed Frame may be easier to reinstall if you place the printer on its front, so that you can apply pressure wh ile putting the screws back in p[...]

T ransfer Roller Guide & T ransfer Roller 1 Remove the Printer Cov ers, Pickup Roller Assembly (Figu res 6-23 through 6-25), and Paper Feed Frame (F igures 6-26 through 6-29 ). 2 Looking at the back of the prin ter , note the two small, hoo k-shaped release tabs on each end of the T ransfer Roller guid e. Using a small, flathead screwdri ver , [...]

Kick Plate Caution Be careful working with the Kick Plate and Separation Pad. The spring underneath the Kick Plate may stay attached to the Kick Plate, but it is also likely to spring away from the Kick Plate. Place the spring aside for Separation Plate disassem bly . 1 Remove the Printer Covers and the Picku p Roller Assembly (Figures 6-23 and 6-2[...]

To reinstall If the spring on the Kick Plate doe sn’t stay on the Kick Plate, replace the spring, making certain the diam eter of the spring surrounds two lower pins on the Kick Plate and rests inside the third pin. Use needle nose pliers to place the spring correctly . (See Figure 6-3 2.) Kick Plate Spring Replacement While rotatin g the Kick Pl[...]

Separation Pad 1 Remove the Printer Covers, Picku p Roller Assembly (Figures 6-23 and 6-24 ), and Kick Plate (Figure 6-31 ). 2 Lift the bottom of the white plastic tab on the rear of the Paper Feed Fram e up slightly and slide it up, toward the top of the Paper Feed Frame. This will release the Separation Pad (F igure 6-33 ). 3 Lift the Separation [...]

Subpads Note When you replace the Separ ation Pad, you should also replace the smaller subpa ds at the same time. 1 Place your index finger on the subpad. 2 Press toward the top of the printer . Subpad Removal Figure 6-34 6 - 38 Removal and Replacement[...]

F eed Assembly The Feed Assembly is located in the Paper Feed Frame. 1 Remove the Pr inter Covers, Pickup Roller Assembly (Figures 6-23 throu gh 6-25), and Paper Feed Frame (Fig ures 6-26 throu gh 6-29). 2 T urn the Paper Feed Fram e upside down. 3 Remove the Feed Roller Shaft by lifting the plastic tab up (Fig ure 6-35, callout 1) and sliding it o[...]

4 Remove the self-tapping screw that holds the Feed Assembly in place (Figure 6-36, callout 1). Note Before proc eeding to Step 5, examine the tabs and how they fit into their slots (Figure 6-36, callout 2). The tabs mu st be reinstalled to exactly this position . 5 Remove the Feed Assem bly . Feed Assembly Removal (2 of 3) Figure 6-36 6 - 40 Remov[...]

6 T urn the Feed Assem bly over and place it in one han d with the roller-side down. Pop one of the tabs on the other side and the feed roller should fall into your hand (Figure 6-3 7). Feed Assembly Removal (3 of 3) To reinstall Before securing the screw , ensure the tabs on the Feed Assembly are position ed in their slots on the Paper Feed Frame [...]

Bottom Assemblies Memory Door Guide 1 Remove the Printer Covers. 2 Remove any extra memory . 3 T wo tabs hold the mem ory door guide on the printe r chassis. Press each tab inward (Figure 6-38) . 4 Pull the memory door guid e out. Memory Door Guide Removal Figure 6-38 6 - 42 Removal and Replacement[...]

Motor 1 Remove the Printer Covers. 2 Remove the motor connec tor (Figure 6-39 , callout 1). 3 Remove the memor y door guide to expose the two motor screws. 4 Remove the motor screws (Figure 6-39, callou t 2). 5 Lift the Motor out. Motor Removal Figure 6-39 6 Remov al and Replacement Removal and Replacement 6 - 43[...]

DC Controller 1 Remove the Printer Covers. 2 Disconnect the m otor connector fro m the motor (Figu re 6-39, callout 1). 3 Disconnect the So lenoid connector from the DC Controller (Figure 6-2 2, callout 1). 4 Remove the back sheet metal plate and disconnect the PS 202/PS204 conn ector (Figure 6-29) . 5 Remove the A C Cable cover and disconnect the [...]

8 Lift the bottom plate, rotating the plate toward you from the back as if hing ed on the front. Release the Fusing Assembly con nector (J206) (Figure 6-41 , callout 1). Caution ESD SE NSITIV E! DC Controller Removal (2 of 3) Figure 6-41 6 Remov al and Replacement Removal and Replacement 6 - 45[...]

9 Remove the (7) remaining conne ctors (Figure 6-42 , callout 1). 10 Remove the screws (5) that secure the DC Controller to the m etal case (Figure 6-42, callout 2). DC Controller Removal (3 of 3) 11 Remove the DC Controller by lifting gently on the side oppo site the form atter , then sliding it out. Cautio n Be careful not to rotate the DC Contro[...]

F ormatter PCA Caution ESD SE NSITIV E! 1 Remove the Printer Covers and complete the DC Con troller removal direction up to step 8 (Figures 6-40 and 6-4 1). 2 Remove the two cable clips (Figure 6-4 3, callout 1). 3 Remove all (4) screws from the formatter cover (Figure 6-43 , callout 2). Lift the I/O shield to remove it. 4 Remove the Control Panel [...]

6 - 48 Removal and Replacement[...]

7 T r oublesh ootin g Contents General T roubleshootin g Flo wchart . . . . . . . . . . . . . . . . . . . . . . . 7-3 Paper Path and Components . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5 DC Controller Diag ram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6 Printer Error T roubleshootin g . . . . . . . . . . . . . . . .[...]

7-2 T roubleshoo ting[...]

General T roubleshooting Flowchart When the AC pow er is first applied to the printer : • Both the printer mo tor and the laser/scanner motor rotate for 6 second s. • All of the LEDs illum inate for one second; the “Ready” L ED will illuminate after 3 second s. If no error message is displayed, the Printer Door is firmly closed, and the ton[...]

General T r oub leshooting Flowch art (continued) Refer to the section “Image Form ation Troublesho oting,” later in this chapter. If the engine test produces a clear prin t image, yet a Self Test is not generated by initiating the Control Pan el self-test procedure, replace the Formatter PC A. Perform an Engine Test Is the Engine Test image be[...]

Paper Path and Comp onents Paper Path and Components PS201 PS203 PS202 SL1 Motor Feed Roller Feed Sub Roller Pick-up Roller Paper Registration Sensor Paper Out Sensor Paper Pick-up Solenoid Photo- sensitive Drum Transfer Roller Fuser Paper Exit Sensor Fusing Unit Delivery Roller Face-up Delivery Deflector Face-down Delivery Face-down Delivery Rolle[...]

DC Controller Diagram DC Controller PCA Components J3 Control Panel Con nector (Formatter PCA) J202 Paper Registration and Paper-Out Photosensors (PS 203 and PS202) J102 Fusing Assembly J206 Fusing Assembly (thermistor feedbac k) J201 Formatter PCA Connection J207 Scann er Motor J204 Paper Pickup So lenoid (SL1) J208 Laser Driver/Beam Detect Circui[...]

Printer Error T roubleshooting Inform ation regarding printer status is con ve yed by two methods: 1) the prin ter’ s Control Panel lights and 2) feedb ack through the bi-d irectional I/O that displays at the PC. The basic m ethod of determining error me ssages uses patterns of lights on the Control Panel LE D. Printer me ssages are categorized i[...]

Printer Status Messages The following table lists printer LED messages and their meanings and describe s recommen ded actions. For more info rmation on the Fron t Panel layout, refer to “Using the Co ntrol Panel” in Chapter 3, “Installa tion and Configuration.” LEDs Description Recommended Action P aper Out Error . Door Open or No EP Cartri[...]

Occasionally you may add paper , close the printer door, add the toner cartrid ge, and clear a paper jam, only to find that the printer still displays an error message . If this happens, trou bleshoot using T able 7-3 below . Note If the error appear s and persists only after you attempt to print a page, verify that the motor is func tioning. (See [...]

Service and Error Messages Service erro rs prevent further printer operation until some action is taken. W hen there is a service error, all of the lights will turn on in a steady state. Press and hold the Front Panel Button to see a pattern in the lights. (T he error will only be displayed as long as this button is pressed.) Use T able 7-4, “Ser[...]

Heating Element Resistance Check Figure 7-3 LEDs Description Recommended Action Beam Err or . There are a number of causes for thi s error , and some of the causes ma y be transient. (They ma y disappear .) 1. P ower-cycle the printer by unplugging the printer and plugging it bac k in. 2. Make cer tain the Laser/Scanner Assemb ly is correctly seate[...]

LEDs Description Recommended Action Scanner Err or . Caused by a scanner malfunction. 1. P ower-cycle the printer b y unplugging the printer and plugging it bac k in. 2. Ensure condensation caused by moving the printer from a cold to a w ar m environment hasn’t occurred . Allo w the printer to acclimate to the warmer room. 3. V erify the two Lase[...]

Image F ormation T roubleshooting Check the T oner Cartrid ge Image form ation defects are many times the result of tone r cartridge prob lems. If there is any doubt, always replace the toner cartridge befo re troubleshoo ting image defects. Use the following check list to ensure that the toner cartridge is still operable. • Ensure that the toner[...]

Image Defect Examples This section illustrates some imag e defects and their possible causes. Since there are many variables in the printing process, you may encou nter image defects that are not illustrated in the following examples. If you find a defect that is not illustrated , record the pro bable cause along with the printin g en viron mental [...]

V ertica l Lines Sometimes vertically aligned black streaks or smears can appe ar on successive pages. • The toner cartrid ge may be dam aged. Replace it. • The printer may need cleaning. See “Cleaning You r Printer,” in Cha pter 4. • Replace the heatin g element. Horizont al Stripes Sometimes horizo ntally aligned black streaks or smea r[...]

Character V oids Character voids are white areas with in the parts of characters that should be solid black. • If you are using transparencies when you expe rience this problem, try another type of transparency. Hew lett-Packard transpar encies are designed to min imize character voids. (Becau se of the composition of transp arency m edia, some c[...]

Dropouts Dropouts are char acters that are partially printed . • The Pape r Input Bin may have been loaded with too much paper. Mak e sure that no more than 100 sheets of paper are loaded. • A single sheet of paper may be defectiv e. Try reprinting the job. • Try adjustin g the print density throu gh your software or printe r driver. • Try [...]

Blank Page (Oc casional) A page is completely blan k. If you get occasional blank pages: • Make sure you r page length and margins are set correctly for the paper size you use. If you are printing on small med ia and your page is blank, try prin ting on larger media to see wher e the image is printin g. Adjust marg ins accordingly. • Some shari[...]

Dots • Clean the static charge elimin ator. (See Chap ter 4, “Printer Ma intenance.") • There m ay be discontinuities in the high- voltage contact points. Clean the high voltage contac t points on the toner cartridge and transfe r roller. • Replace the transf er roller. Dirt on the Back of the Page • Use the image defect ruler to det[...]

Distorted Image or BD Failure • Make certain the prin ter is not facing the sunlight. • The paper ma y not meet HP’s paper specifications. Select differen t paper. • Clean the Laser/Scann er Assembly by blow ing compressed air in the slot on the bottom of the assemb ly. • Make sure the two La ser/Scanner con nectors are firmly seated. •[...]

T r oubleshooting Checks Engine T est The engin e test print is used to v erify that the print engine is func tioning correctly . The Forma tter PCA is completely byp assed during an engine test, so this test is useful for isolating printer proble ms. The engin e test prints a full page of vertical lines down the entire printable area and is also u[...]

Half-Self T est Fun ctional Check The electrop hotographic proc ess can be subdi vided into the following stages: • Cleaning (rem oving excess toner from drum surface) • Condition ing (placing a unif orm electrical charge on drum) • Writing (laser strikes surfac e of drum to create latent imag e) • Developm ent (formatio n of the toner imag[...]

Drum Rotation Functional Chec k The pho tosensitive drum , located in the toner cartridg e, must rotate for the print process to work. Th e photosensitive drum receives its drive from the Main Drive assembly . T o verify wh ether the drum is rotating: 1 Open the Prin ter Door . 2 Remove the toner cartrid ge. 3 Mark the cartridg e’ s drive gear wi[...]

High-V oltage Power Supply Check The High -V oltage Power Supply PCA provides the necessary voltages for the electrophotog raphic processes. A method for verifying the high- voltage system is given in the table belo w . Toner Cartridge High Voltage Connection Points (1 of 2) • Charging (1) • Drum Gr ound (2) • Developin g Roller (3) Checks Ac[...]

Toner Cartridge High Voltage Connection Points (2 of 2) • Charging (1) • Drum Gro und (2) • Developing Ro ller (3) Figure 7-6 7 T roubleshooting Troubleshooting 7-25[...]

Paper Curl Paper curl is inherent to the laser printin g processes, and occurs when pap er is subjected to heat. Paper curl tends to relax as the paper cools wh ile resting on a flat surface. The specification for maximu m paper curl when the paper is lying flat before print is 5 mm (0.2 inches). Although pap er curl cannot be totally eliminated, s[...]

T r oubleshooting T ools Paper Path Check If paper is not being picked up or is not moving throu gh the paper path, you may want to observe all of the paper motion activities. Overriding PS 204 (5L) or SW 101 (6L) allows you to observe: • Motor rotatio n • Solenoid action • Kick plate motion • Paper Pickup Roller m otion • Drive Roller, T[...]

Repetitive Image Defect Ruler Repetitive Image Defect Ruler Figure 7-8 7-28 T roubleshootin g[...]

Main Wiring Diagram Figure 7-9 Main Wiring Diagram 7 T roubleshooting Troubleshooting 7-29[...]

Connector Signal Name Remarks J401 pin 1 MA Motor Drive Signal J401 pin 2 /MA Motor Drive Signal J401 pin 3 MB Motor Drive Signal J401 pin 4 /MB Motor Drive Signal J204 pin 1 +12 V 5L only J204 pin 2 CPUD Solenoid SL1 Pickup Drive (5L only) J202 pin 1 +5V J202 pin 2 GND J202 pin 3 P APSENS “L” when PS 202 detects paper J202 pin 4 +5V J202 pin 5[...]

Connector Signal Name Remarks J209 pin 3 DOSNS “H” when car tridge is not installed or the front door is open at PS204. J305 pin 1 +12A V J305 pin 2 N/U J305 pin 3 +12 V J206 pin 1 FRSTH Fusing temperature f eedbac k J206 pin 2 FG J102 pin 1 Fusing assemb ly drive v oltage J102 pin 2 Fusing assemb ly drive v oltage Table 7-8 Cable Pinouts 7 T r[...]

7-32 T roubleshootin g[...]

8 Parts and Diagrams Contents How to Use the Part Lists and Diagrams . . . . . . . . . . . . . . . . . . . . 8-3 Ordering Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3 Ordering Con sumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4 Accessories and Supplies . . . . . . . . . . . . . . . . . . . . . . . .[...]

8-2 Parts and Diagrams[...]

How to Use the Part Lists and Diagrams The Figu res in this chapter illustrate the major subassem blies in the printer and their compon ent parts. A table (material list) follo ws each exploded assembly diagram. Each table lists the reference design ator (item num ber) for each part, the associated part number for the item, the quantity , and a des[...]

Ordering Con sumables Consumab les and accessories such as those listed on T able 8-1 m ay be ordere d from Hewlett-Packard. The phone num bers are: U.S.: 1-800 -538-878 7 Canada: 1-8 00-387-31 54 (T oronto) 516-671-8383 United Kin gdom: 0734-44 1212 Germany: 013 0-3322 Contact your local HP Parts Coordinato r for other local phon e numbers. Note P[...]

Accessories and Supp lies The following items are av ailable through your local authorized HP dealer . T o find a dealer near you (or if you r dealer is temporarily out of stock), call the HP Custo mer Inform ation Center (800) 752 -0900. Note Refer to “Relate d Docume ntation” in Chapter 1 for docu mentation and training media pro duct numbers[...]

Common Hardware Example Description Scre w , Machine, T r us Head M3x4, M3x6, M3x8 Scre w , Star , 3x6 Scre w , Self-tap , 4x10 Scre w , He x-head, 3x8 Scre w , He xhead, 3x6,m 3x8, 3x10 Table 8-2 Common Fasteners Used in the Printer 8-6 Parts and Diagrams[...]

Major Assembly Locations Figure 8-1 8 Par ts a n d Diagrams Parts and Diag rams 8-7[...]

Covers and Doors Figure 8-2 8-8 Parts and Diagrams[...]

Ref LaserJet 5L Part No. LaserJet 6L Part No. Qty Description 1 RB1-7211-000CN RB2-1637-000CN 1 Input Extender 1 2 RB1-7212-000CN RB2-1638-000CN 1 Input Extender 2 3 RB1-7333-000CN RB2-1636-000CN 1 Back Cov er 4 RG5-1995-000CN RG5-3443-000CN 1 Main Cover 4A RB1-7278-000CN RB2-1644-000CN 1 F ace-up/F ace-down Switch 5 RB1-7326-000CN RB2-1695-000CN 1[...]

Internal Components (1 of 3) Figure 8-3 8-10 Parts and Diag rams[...]

Ref LaserJet 5L Part No. LaserJet 6L Part No. Qty Description 1 R Y7-5005-000CN RY7- 5005-000CN 1 Gear Kit #1 2 RB1-7288-000CN RB1-7288-000CN 2 Exit Roller Bushing 3 RB1-7105-000CN RB1-7105-000CN 1 Fuser Release T ab 4 RB1-7106-000CN RB2-1632-000CN 1 Gear Plate 5 RB1-7107-000CN RB1-7107-000CN 1 F ront Gear Case 6 R Y7-5007-000CN R Y7-5007-000CN 1 F[...]

Internal Components (2 of 3) Figure 8-4 8-12 Parts and Diag rams[...]

Ref LaserJet 5LPart No. LaserJet 6LPart No. Qty Description 1 RB1-7109-000CN RB1-7109-000CN 1 Memory Door Guide 2 RB1-7247-000CN RB1-7247-000CN 1 Fuser P aper Gui de 3 RB1-7344-000CN RB1-7344-000CN 1 AC Cab le Cover 4 RF5-1509-000CN RF5-1509-000CN 1 Bac k Sheet Metal 5 RB1-7343-000CN RB1-7343-000CN 1 Control P anel Cable Guide 6 RB1-7130-000CN RB1-[...]

Internal Components (3 of 3) Figure 8-5 8-14 Parts and Diag rams[...]

Ref LaserJet 5LPart No. LaserJet 6LPart No. Qty Description 1 RB1-7223-000CN RB1-7223-000CN 1 Pic kup Roller Grounding Clip 2 RB1-7246-000CN RB1-7246-000CN 2 Pressure Roller Bushing 3 RB1-7341-000CN RB1-7341-000CN 1 EP Right Hand Guide #2 4 RF5-1516-000CN RF5-2362-000CN 1 Pressure Roller 5 RF5-1517-000CN RF5-1517-000CN 1 Fuser Press ure Plate 6 RF5[...]

DC Controller/Formatter and Cables Figure 8-6 8-16 Parts and Diag rams[...]

Ref LaserJet 5L Part No. LaserJet 6L Part No. Qty Description 1 RG5-2024-000CN RB2-1719-000CN 1 F ormatter Shield 2 C3942-67902 C3991-60001 1 F ormatter , New C3942-69002 n/a 1 F ormatter , Exchange 3 RG5-2023-000CN RG5-3506-000CN 1 DC Controller PCA (110 V) 3 RG5-2025-000CN RG5-3509-000CN 1 DC Controller PCA (220 V) 3 C3941-69001 n/a DC Controller[...]

Pickup Roller Assembly Figure 8-7 8-18 Parts and Diag rams[...]

Ref LaserJet 5L Part No. LaserJet 6L Part No. Qty Description 1 RB1-7177-000CN RB1-7177-000CN 1 P aper Feed Fra me 2 R Y7-5008-000CN R Y7-5008-000CN 1 Separation P ad Assembly 3 R Y7-5009-000CN RY7- 5009-000CN 1 Input Sensor Assembly 4 RG5-1951-000CN RG5-3486-000CN 1 Pic kup Roller Assemb ly 5 RB1-7184-000CN RB1-7184-000CN 1 Pic kup Roller Bushing [...]

Feed Assembly Figure 8-8 8-20 Parts and Diag rams[...]

Ref LaserJet 5L Part No. LaserJet 6L Part No. Qty Description RG5-1942-000CN RG5-3485-000CN 1 Feed Assemb ly 9 RB1-7226-000CN RB2-1699-000CN 1 Idler Roller Table 8-9 8 Par ts a n d Diagrams Parts and Diagrams 8-21[...]

Separation Guide Assembly Figure 8-9 8-22 Parts and Diag rams[...]

Ref LaserJet 5L Part No. LaserJet 6L Part No. Qty Description RG5-2013-000CN RG5-3475-000CN 1 Separation Guide Assemb ly 2 RB1-7276-000CN RG5-3476-000CN 1 Face-Up/F ace-Do wn Lever 4 RB1-7289-000CN RB2-1690-000CN 1 Fuser Roller Bushing 7 RF5-1522-000CN RF5-2368-000CN 1 Fuser Exit Roller Assembly Table 8-10 8 Par ts a n d Diagrams Parts and Diagrams[...]

Delivery Assembly Figure 8-10 8-24 Parts and Diag rams[...]

Ref LaserJet 5L Part No. LaserJet 6L Part No. Qty Description RG5-2012-000CN RG5-3474-000CN 1 Delivery Assembly 1 RB1-7284-000CN RB1-7284-000CN 4 Delivery Roller #1 2 RB1-7285-000CN RB2-1685-000CN 2 Delivery Roller #2 3 RB1-7286-000CN RB1-7286-000CN 4 Deliv er y Spring#1 4 RB1-7287-000CN RB1-7287-000CN 2 Deliv er y Spring#2 6 RG5-2015-000CN RG5-347[...]

8-26 Parts and Diag rams[...]

A Parts Index Parts Index A-1[...]

Parts Index Description Part No. Fig. Ref. A C Cable Cov er RB1-7344-000CN 8-4 3 Bac k Cov er (5L) RB1-7333-000CN 8-2 3 Bac k Cov er (6L) RB2-1636-000CN 8-2 3 Bac k Grounding Clip RB1-7199-000CN 8-7 7 Bac k Sheet Metal RF5-1509-000CN 8-4 4 Cap RB1-7234-000CN 8-4 7 Cap RB1-7302-000CN 8-4 8 Case Grounding Metal RB1-7129-000CN 8-5 8 Clutch RB1-7197-00[...]

Description Part No. Fig. Ref. Door Switch Cable (5L) RG5-2037-000CN 8-6 14 EP Door Assembly (5L) RF5-1501-030CN 8-2 8 EP Door Assembly (6L) RF5-2352-000CN 8-2 8 EP Door Chimney (5L) RB1-7327-000CN 8-2 6 EP Door Chimney (6L) RB2-1697-000CN 8-2 6 EP Left Hand Guide RF5-1514-000CN 8-5 10 EP Right Hand Guide #1 RF5-1515-000CN 8-5 9 EP Right Hand Guide[...]

Description Part No. Fig. Ref. Fuser Pressure Plate RF5-151 7-000CN 8-5 5 Fuser Release Kit R Y7-5007-000CN 8-3 6 Fuser Release T ab RB1-7105-000CN 8-3 3 Fuser Roller Bushing (5L) RB1-7289-000CN 8-9 4 Fuser Roller Bushing (6L) RB2-1690-000CN 8-9 4 Gear Kit #1 R Y7-5005-000CN 8-3 1 Gear Kit #2 (5L) R Y7-5006-000CN 8-3 8 Gear Kit #2 (6L) R Y7-5036-00[...]

Description Part No. Fig. Ref. Left Pressure Roller Housing RB1-7255-000CN 8-5 13 Main Cov er (5L) RG5-1995-000CN 8-2 4 Main Cov er (6L) RG5-3443-000CN 8-2 4 Main Motor (5L) RH7-1282-000CN 8-3 7 Main Motor (6L) RH7-1320-000CN 8-3 7 Memory Door (5L) RB1-7321-000CN 8-2 13 Memory Door (6L) RB2-1639-000CN 8-2 13 Memory Door Guide RB1-7109-000CN 8-4 1 M[...]

Description Part No. Fig. Ref. Scre w XA9-0724-000CN 8-2 11 Scre w (with star washer) XA9-0855-000CN 8-4 10 Scre w XB1-1300-807CN 8-4 502 Scre w XA9-0267-000CN 8-3 503 Scre w XA9-0824-000CN 8-5 17 Scre w XA9-0686-000CN 8-5 21 Scre w XA9-0724-000CN 8-4 9 Scre w XA9-0724-000CN 8-5 20 Scre w XB4-7401-0074CN 8-4 501 Scre w XB4-7401-0007 8-7 501 Scre w [...]

Part No. Description Fig. Ref. C3941-69001 DC Controller PCA (110V) (Exchange) (5L) 8-6 3 C3941-69002 DC Controller PCA (220V) (Exchange) (5L) 8-6 3 C3941-69003 Laser Scanner (Exch ange) (5L) 8-3 19 C3942-67902 F ormatter (New) (5L) 8-6 2 C3942-69002 F ormatter (Exchange) (5L) 8-6 2 C3991-60001 F ormatter (New) (6L) 8-6 2 CK-8006 Pre ssure Roller G[...]

Part No. Description Fig. Ref. RB1-7288-000CN Exit Roller Bus hing 8-3 2 RB1-7289-000CN Fuser Roller Bushing (5L) 8-9 4 RB1-7293-000CN Flag 8-5 18 RB1-7294-000CN Flag Spring 8-5 19 RB1-7302-000CN Cap 8-4 8 RB1-7305-000CN I/O Sheet Metal 8-4 12 RB1-7321-000CN Memory Door (5L) 8-2 13 RB1-7326-000CN Output Extender 1 (5L) 8-2 5 RB1-7327-000CN EP Door [...]

Part No. Description Fig. Ref. RF5-1514-000CN EP Left Hand Guid e 8-5 10 RF5-1515-000CN EP Right Hand Guide #1 8-5 9 RF5-1516-000CN Pressure Roller (5L) 8-5 4 RF5-1517-000CN Fuser Pressure Plate 8-5 5 RF5-1521-000CN Exit Roller (5L) 8-3 17 RF5-1522-000CN Fuser Exit Roller Assemb ly (5L) 8-9 7 RF5-1530-000CN T ransfer Roll er Guide (5L) 8-5 6 RF5-15[...]

Part No. Description Fig. Ref. RG5-2031-000CN Door Sensor Cable (5L) 8-6 9 RG5-2032-000CN Therm istor Cable 8-6 10 RG5-2033-000CN Motor Cable 8-6 11 RG5-2034-000CN Scanner Cable (5L) 8-6 12 RG5-2035-000CN Laser Cable (5L) 8-6 13 RG5-2036-000CN Control P anel PCA Cab le (5L) 8-6 5 RG5-2037-000CN Door Switch Cable (5L) 8-6 14 RG5-3443-000CN Main Cove[...]

Part No. Description Fig. Ref. R Y7-5006-000CN Gear Kit #2 (5L) 8-3 8 R Y7-5007-000CN Fuser Relea se Assemb ly 8-3 6 R Y7-5008-000CN Sep eration P ad Kit 8-7 2 R Y7-5009-000CN Input Sensor As sembly 8-7 3 R Y7-5036-000CN Gear Kit #2 (6L) 8-3 8 VD7-0211-002CN Fuse 101 (110 V) 8-6 VD7-0643-151CN Fuse 101 (220 V) 8-6 VS1-5057-002CN Fuser Connector 8-5[...]

A-12 Parts Index[...]

B Regulatory Inf ormation Laser Safety (U .S.A.) The Cente r for Devices and Radiological Health (CD RH) of the U.S. Food and Drug Adm inistration implem ented regulations for laser products manufactured since August 1, 1976 . Compliance is man datory for products mar keted in the United States. This printer is certified as a “Class 1” laser pr[...]

Laser Statement (Finland ) The following applies to printer operation and servicing in Finland. LASER TUR V ALLISU US LUOKAN 1 LASERLAITE KLASS 1 LASER APP ARA T HP LaserJet(s) 4V and 4MV laserkirjoitin on käyttä jän kannalta turvallinen luokan 1 laserlaite. Normaalissa käyt"ssä kirjoittimen suojakotelointi estää lasersäteen pääsyn l[...]

T oner Safety Note In case of toner spills, skin and clothing are best cleaned by rem oving as much toner as possible with a dry tissue, then washing with cold water . Hot water causes toner to permanently set into cloth ing. MSDS Informatio n A Material Safe ty Data Sheet (MS DS) for toner or any other chem ical used in the printer is available th[...]

FCC Statement (Class B) Note: This equipm ent has been tested and foun d to comply with the limits for a Class B digital device, pur suant to part 15 of the FCC rules. These limits are designed to provide reasonable protec tion against harm ful interference in a residential installation. This equipm ent generates, uses, and can radiate radio freque[...]

C Service Notes Fuser Accordian Jams C3941A- 01 SERVICE NOTE SUPE RSEDES: NONE HP C39 41A LaserJet 5L Serial Numbers: <JPBB02 2333 <JPTB000 101 <JPBJ0413 10 <JPBK0061 51 <JPBL033831 <JPTJ000 101 <JPTK000101 <JPTL000 101 <USBB1583 23 <JPTM080 500 <JPBM007279 <JPBT000 101 <JPBV0001 01 <JPTT090 666 <JPTV122[...]

T o remov e the paper jam the fuser area of the printer must be disassembled. Fusers and pressure rollers should be checked for damage from the paper jam or the customers attempts to remov e the paper jam. The output tray fin should be installed in all LaserJet 5L ’ s in the affected serial number rang e that are returned for any service, paper j[...]

Fuser Jam Clearing Countermeasure C3941A -02A SERVICE NOTE SUPERSEDE S: C3941A-02 HP C39 41A LaserJet 5L Serial Numbers: JPBK00000 0 / JPBK016388 JPBL0000 00 / JPBL0553 74 JPCW0000 00 / JPCW043448 JPVW000000 / JPVW0 81157 USCB000000 / USCB3 02011 JPBV00000 0 / JPBV010501 JPVV00000 0 / JPVV216255 CNVM00000 0 / CNVM175233 CNVN000000 / CNVN1899 64 Las[...]

T o remov e this type of paper jam the fuser area of the printer must be disassembled. The fuser and pressure roller sh ould be checked for damage from the paper jam or the customer ’ s attempts to remov e the paper jam. See chapter 6 in the service manual for disassemb ly instructions. This JP protector and the output tray fin (from service no t[...]

Index A A C power distribution 5-6 circuitry 5-6 accessories and supplies 8-5 acoustic emissions 1-6 assistance, technical 1-12 B background scatter 7-16 black page 7-16 blank page all pages 7-18 occasional 7-18 bottom assemblies DC Controller 6-44 formatter PCA 6-47 memory door guide 6-42 motor 6-43 C cable pinouts 7-30 cables replaceable 8-6 capa[...]

standard 1-3 internal assemblies 8-10, 8-12, 8-14 control panel 6-11 delivery assembly 6-13 exit roller assembly 6-12 face-up/face-down lever 6-21 fuser exit roller 6-22 fuser pressure plate 6-15 heating element 6-17 pressure roller 6-20 internal typefaces 1-3 INTR, printer timing 5-19 J Japanese VCCI Statement B-4 L laser and scanner driv e 5-5 la[...]

PRNT 5-19 STBY 5-19 WAIT 5-19 printing self test page 3-7 priority of errors 7-7 PRNT , printer timing 5-19 product information 1-1 to 1-16, 3-1 to 3-12 product ov ervie w 1-7 R radio frequency interference, RFI B-4 RAM 5-8 described 5-8 random access memo ry described 5-8 read only memory described 5-8 ready light 3-3 regulatory information B-1 to[...]

warning messages 6-3 warranty exclusions 1-14 limitations 1-15 start date 1-15 voltage 1-15 warranty 1-14 wiring diagram 7-29 wiring diagrams, main 7-29 writing process 5-13 Inde x Index-4[...]

Printed on Recycled P aper *C3990-90991* *C3990-90991* C3990-90991 HP LaserJ et 5L and 6L Printer Ser vice Manual Copyright© 1997 He wlett P ackard Co. Printed in USA 9/97 Manual Part No. C3990-90991 HP LaserJet 5L and 6L Printer (C3941/C3990) Service Manual[...]