Lexmark 4026-0XX manual

4026-0XX Optra™ E Le xmark and Optra are trademarks of Le xmark Inter national, Inc., registered in the United States and/or other countries. • T able of Contents • Inde x • Safety and Notices • T rademarks • Star t Diagnostics • Manuals Menu[...]

Third Edition (April 1997) The f ollowing par agraph does not apply to the United Kingdom or any country where such provisions are inconsistent with local la w: LEXMARK INTERNA TIONAL, INC . PRO VIDES THIS PUBLICA TION “AS IS” WITHOUT W ARRANTY OF ANY KIND , EITHER EXPRESS OR IMPLIED , INCLUDING, BUT NO T LIMITED T O, THE IMPLIED W ARRANTIES OF[...]

iii 4026-0XX Contents 1 N o t i c e sa n dS a f e t yI n f o r m a t i o n .......................... v i L a s e rN o t i c e ....................................... v i S a f e t yI n f o r m a t i o n .................................. x v i O z o n eI n f o r m a t i o n ................................. x i x P r e f a c e ....................[...]

iv D i a g n o s t i cA i d s ...................................... 3 - 1 P o w e r - O nS e l fT e s t( P o s t ) ........................... 3 - 1 Diagnostic Tests . ................................. 3 - 3 Printer Diagnostic Test . . ........................ 3 - 3 Service Diagnostic T est Page ..................... 3 - 4 U s e rM o d eP r i n tT[...]

v 4026-0XX Removal Procedures (continued) Paper Feed Solenoid Removal . . . ................ 4 - 1 2 Paper Feed Input Tray Assembly Removal . . . ....... 4 - 1 2 Paper Lift Plate Assembly Removal ................ 4 - 1 2 Paper Separator Removal ....................... 4 - 1 3 Printhead Removal ............................. 4 - 1 3 Print Media Selec[...]

vi Service Manual 4026-0XX Notices and Safety Inf ormation Laser Notice The printer is cer tified in the U.S . to conform to the requirements of DHHS 21 CFR Subchapter J for Class I (1) laser products , and elsewhere is certified as a Class I laser product conforming to the requirements of IEC 825. Class I laser products are not considered to be ha[...]

Notices and Safety Information vii 4026-0XX Laser product labels are located on the back of the printer and on the printhead. CLASS 1 LASER PRODUCT LASER KLASSE1 NA CH IEC825 LUOKAN 1 LASERLAITE APP AREIL A LASER DE CLASSE1 T O IEC 825[...]

viii Service Manual 4026-0XX[...]

Notices and Safety Information ix 4026-0XX Laser Der Drucker erfüllt gemäß amtlicher Bestätigung der USA die Anf orderungen der Bestimmung DHHS (Depar tment of Health and Human Ser vices) 21 CFR T eil J für Laserprodukte der Klasse I (1). In anderen Ländern gilt der Dr uck er als Laser produkt der Klasse I, der die Anf orderungen der IEC (Int[...]

x Service Manual 4026-0XX A vver tenze sui prodotti laser Questa stampante è cer tificata negli Stati Uniti per essere conf orme ai requisiti del DHHS 21 CFR Sottocapitolo J per i prodotti laser di classe 1 ed è cer tificata negli altri Paesi come prodotto laser di classe 1 conf orme ai requisiti della norma CEI 825. I prodotti laser di classe no[...]

Notices and Safety Information xi 4026-0XX Dec laração sobre Laser A impressora está cer tificada nos E.U .A. em conformidade com os requisitos da regulamentação DHHS 21 CFR Subcapítulo J par a a Classe I (1) de produtos laser . Em outros locais, está cer tificada como um produto laser da Classe I, em conf or midade com os requisitos da nor [...]

xii Service Manual 4026-0XX Lasermeddelelse Printeren er godkendt som et Klasse I-laser produkt, i ov erenstemmelse med krav ene i IEC 825. Klasse I-laser produkter betragtes ikk e som f arlige. Printeren indeholder inter nt en Klasse IIIB (3b)-laser , der nominelt er en 5 milliwatt galliumarsenid laser , som arbejder på bø lgelængdeområdet 770[...]

Notices and Safety Information xiii 4026-0XX Laser -notis Denna skrivare är i USA cer tifierad att motsv ara krav en i DHHS 21 CFR, under parag raf J för laserprodukter av Klass I (1). I andra länder uppfyller skrivaren kra v en för laserprodukter av Klass I enligt kra v en i IEC 825. Laser produkter i Klass I anses ej hälsovådliga. Skrivaren[...]

xiv Service Manual 4026-0XX A vís sobre el Làser Segons ha estat cer tificat als Estats Units, aquesta impressora compleix els requisits de DHHS 21 CFR, apar tat J , pels productes làser de classe I (1), i segons ha estat cer tificat en altres llocs, és un producte làser de classe I que compleix els requisits d’IEC 825. Els productes làser [...]

Notices and Safety Information xv 4026-0XX Japanese Laser Notice Chinese Laser Notice[...]

xvi Service Manual 4026-0XX K orean Laser Notice Safety Inf ormation • The maintenance inf ormation for this product has been prepared f or use by a prof essional ser vice person and is not intended to be used by others . • There ma y be an increased risk of electr ic shoc k and personal injur y during disassembly and servicing of this p roduct[...]

Notices and Safety Information xvii 4026-0XX • Während des A useinandernehmens und der Wartung des Geräts besteht ein zusätzliches Risiko eines elektrischen Schlags und kör perlicher V erletzung. Das zuständige F achpersonal sollte entsprechende V orsichtsmaßnahmen treff en. • Ersatzteile müssen gleiche oder gleichwer tige Merkmale wie d[...]

xviii Service Manual 4026-0XX personales durante el desmontaje y la reparación de la máquina. El personal cualificado debe ser consciente de este peligro y tomar las precauciones necesarias. • Los dispositivos de seguridad de algunas piezas no siempre pueden reconocerse a simple vista. P or lo tanto, los recambios deben poseer características [...]

Notices and Safety Information xix 4026-0XX Chinese Safety Inf ormation K orean Safety Inf ormation Ozone Inf ormation This product does not produce measurab le amounts of ozone gas .[...]

xx Service Manual 4026-0XX Preface This manual is divided into the f ollowing chapters: • “General Inf or mation” contains a general description of the printer , options, and the maintenance approach used to repair it. General en vironmental and saf ety instructions as well as special tools and test equipment are listed in this chapter . • [...]

4026-0XX General Information 1-1 1. General Inf ormation This printer is a letter-quality page pr inter designed to attach to an IBM P ersonal Computer or other computers compatible with the IBM P ersonal Computer (with 386 processor or higher). The printer is av ailable in models 4026-06A, 06C , 06D , and 06J without Flash memor y and models 4026-[...]

4026-0XX 1-2 Acr on yms CSU Customer Setup DRAM Dynamic Random Access Memor y EP Electrophotographic Process EPROM Erasab le, Prog rammab le Read-Only Memor y ESD Electrostatic Discharge FR U Field Replaceable Unit HVPS High V oltage P ower Supply LASER Light Amplification by Stimulated Emission of Radiation LCD Liquid Crystal Display LED Light-Emi[...]

4026-0XX Diagnostic Inf ormation 2-1 2. Diagnostic Inf ormation Start CA UTION: NEVER manuall y actuate or disable the top co ver interlock s witch and the printhead shutter actuator at the same time . T o perf or m some of the service checks and tests, such as troubleshooting paper f eed problems, y ou need to actuate the top cov er inter loc k s [...]

4026-0XX 2-2 Service Error Codes When a ser vice error occurs the printer stops printing and all operator panel LEDs b link in a continuous pattern, indicating a ser vice error , until the printer is powered off . Press and release the operator panel button to display the service error code. Locate the blinking LEDs in the following table and t ake[...]

4026-0XX Diagnostic Inf ormation 2-3 Controller Card F ailure Replace Controller board Optional Memory Error Replace the optional memor y SIMM. If this does not correct the problem, replace the controller board. F an F ailure Error Go to the “F an Ser vice Check” on page 2-17 . ROM Chec ksum Error Replace the ROM SIMM. If this does not correct [...]

4026-0XX 2-4 NVRAM F ailure Error Replace Controller board ASIC Register F ailure Error Replace Controller board ASIC SRAM F ailure Error Replace Controller board Flash Memor y F ailure Error Replace the ROM SIMM w/Flash. If this does not correct the problem, replace the controller board. F ont Checksum F ailure Error Replace the ROM SIMM. If this [...]

4026-0XX Diagnostic Inf ormation 2-5 Engine Board Communications F ailure Error Replace the engine board. If this does not correct the problem, replace the controller board. Controller SRAM F ailure Error Replace Controller board Blinking Operator P anel LED Action[...]

4026-0XX 2-6 User Error M essage T able When a user error message occurs the printer stops pr inting and one or two operator panel LEDs are on solid or b linking until the printer is powered off . Locate the printer’ s LED Status in the f ollowing tab le and take the indicated action. User Error Message LED Status Action P aper Jam P aper J am on[...]

4026-0XX Diagnostic Inf ormation 2-7 Memor y Full/Com- ple x P age/Resolution Reduction W arning/ Data T ransmission Error Error on solid and Press Button on solid The printer memor y is full or the page is too comple x to print. The printer is forced to reduce the resolution of a f ormatted page to 300 dpi bef ore print- ing, or the printer is una[...]

4026-0XX 2-8 User Secondary Error Message T able Press and release the operator panel button tw o times to displa y the user secondar y error LED status. Each press and release action must be perf ormed within a half second. Locate the pr inter’ s LED status in the f ollowing tab le and tak e the indicated action. User Error Message LED Status Ac[...]

4026-0XX Diagnostic Inf ormation 2-9 Resolution Reduction Ready , Data blinking and the Error , Press B u t t o no ns o l i d Switch from the GL/2 or raster mode to Quick Print Plus mode using the Le xmark driver f or Windows , or press the operator panel button to resume printing, or do a front panel reset by pressing and holding the operator b ut[...]

4026-0XX 2-10 P ower -On Self T est (POST) When you turn the printer on, it performs a P o wer-On Self T est. Check f or correct POST functioning by obser ving the f ollowing: 1. All LEDs come on solid. 2. The f an tur ns on f or 2 seconds. 3. All the LEDs turn off. 4. The engine board checks the status of the co ver interloc k sw it c h . 5. The L[...]

4026-0XX Diagnostic Inf ormation 2-11 18. The polygon motor (pr inthead motor) turns off. 19. The Data LED tur ns off . 20. The Ready LED stays on solid. If your printer did not successfully complete POST , locate the symptom in the “POST Symptom T able” on page 2-12 and take the appropriate action. If the printer completes all these steps and [...]

4026-0XX 2-12 POST Symptom T able Symptom Action POST completes except one or more LEDs do not come on. Go to the “Operator P anel Ser vice Check” on page 2-27. None of the LEDs come on. Go to the “Operator P anel Ser vice Check” on page 2-27. The printer is dead (No LEDs come on, no motor turns) Go to the “Low V oltage P ower Sup- ply Se[...]

4026-0XX Diagnostic Inf ormation 2-13 Symptom T able Locate your symptom in the f ollowing tab le and take the appropr iate action Symptom Action Dead printer Go to the “Lo w V oltage P ower Sup- ply Ser vice Chec k” on page 2-22 . F an not wor king Go to the “F an Ser vice Check” on page 2-17 . F an noisy Go to the “F an Ser vice Check?[...]

4026-0XX 2-14 P aper is not pic ked or ne ver leav es the pr imary tray Go to the “P aper F eed F rame Assembly Service Check” on page 2-37. P aper is not pic ked or ne ver leav es the optional paper tra y (T ra y 2) Go to the “Optional P aper T ray T wo Ser vice Chec k” on page 2-28 . P aper f eeds continuously Go to the “P aper Feed Ser[...]

4026-0XX Diagnostic Inf ormation 2-15 Service Checks Charge Brush Service Check Note: The charge brush charges the photoconductor and is located inside the photoconductor unit. FRU Action 1 Photoconduc- tor Unit Spots and mar ks can be caused b y a defectiv e charge brush inside the photoconductor unit . If there are any spots or marks, especially [...]

4026-0XX 2-16 Cover Interloc k Service Check D-Roll Assembl y Service Check FRU Action 1 Right Hand T ransf er Brac ket Check the right hand transf er brac ket actuator arm to be sure it contacts the interlock switch actuator mounted in the L VPS. Replace the brac ket if the arm is damaged or broken. 2 To p C o v e r Interlock Switch If the interlo[...]

4026-0XX Diagnostic Inf ormation 2-17 Exit Sensor Service Check Fan Service Check FRU Action 1 Engine Board Disconnect the e xit sensor cable from the engine board. Check f or +4.5 V dc to +5.5 V dc at CN8-1. If incorrect, replace the engine board. 2 Exit Sensor Be sure the e xit sensor is snapped in place and the cable is firmly connected. 3 Exit [...]

4026-0XX 2-18 Cold Fuser Service Check If all the Cold Fuser Ser vice Chec k items are correct, go to the “Hot Fuser Ser vice Chec k” on page 2-20 Note: T oner buildup on the fuser input guide, paper separator , hot roll and back up roll causes paper jams. When toner is par tially fused to the paper it is usually caused by low fuser temperature[...]

4026-0XX Diagnostic Inf ormation 2-19 3 Thermistor If the fuser lamp comes on and a fuser f ailure LED error code displays , be sure the ther mistor is contacting the hot roll and the ther mistor c a b l ei sf i r m l ys e a t e di nc o n n e c t o rC N 2o nt h e engine board. Check f or excessiv e toner b uildup on the surf ace of the ther mistor [...]

4026-0XX 2-20 Hot Fuser Service Check Note: If you replace the fuser assemb ly for ov erheating, also replace the engine board. CA UTION: FUSER P ARTS MA Y BE HO T . Input Sensor Service Check If the paper nev er leav es the tra y or fails to be pick ed from the tray , go to the “P aper Feed Serv ice Chec k” on page 2-34 . FRU Action 1 Fuser As[...]

4026-0XX Diagnostic Inf ormation 2-21 3 Input Sensor Flag Check the flag f or damage, especially at the front edge, Be sure the flag mo ves freely . Replace the flag as necessary . 4 Input Sensor Be sure the input sensor is correctly installed and the sensor/solenoid cable is properly con- nected. Disconnect the input sensor cable from the CN3 conn[...]

4026-0XX 2-22 Low V oltage P ower Supply Service Chec k Note: The controller board, HVPS and printhead assembly receiv e pow er from the L VPS through the engine board. If the machine is dead, be sure the controller board is correctly seated in the engine board connector . Check and reseat all cab les. Dead Printer FRU Action 1 Line V oltage Check [...]

4026-0XX Diagnostic Inf ormation 2-23 P ost Incomplete - ERR OR LED remains on solid Note: Be sure the top cov er is closed when doing the f ollowing checks . 5 ROM S IM M and Optional Memor y SIMM Reinstall the ROM SIMM. Check f or +5 V dc at CN7-4. If incorrect, replace the ROM SIMM. Reinstall the optional memor y SIMM if one was installed. Check[...]

4026-0XX 2-24 Fuse F1 continues to open after being replaced FRU Action 1 Fuse F1 If fuse F1 continues to open after being replaced, disconnect CN7 from the engine board and tur n the printer power on. If F1 opens , replace the L VPS. If F1 does not open with CN7 disconnected, check the f ollowing: T urn the pr inter pow er off and disconnect all t[...]

4026-0XX Diagnostic Inf ormation 2-25 Main Drive Motor Service Check FRU Action 1 Main Drive Motor Disconnect CN6 from the engine board. Check the motor f or shor ts between each pin on CN2 and the motor case. If continuity is indicated, replace the motor . Check the resistance betw een the f ollowing pins on the cable connector . If incorrect, rep[...]

4026-0XX 2-26 5 Motor Noise Check the motor f or proper mounting, tight mounting screws , and gear mesh. If incorrect, repair as necessary . If correct, replace the main drive motor . If the motor continues to make noise after the motor is replaced, replace the engine board. FRU Action[...]

4026-0XX Diagnostic Inf ormation 2-27 Operator P anel Service Check FRU Action 1 Operator P anel Assem- bly LEDs Be sure the operator panel cable is properly seated in J5 on the controller board. Run POST and check each LED f or proper operation. If more than one LED does not light or an indi- vidual LED sta ys on solid during POST , replace the f [...]

4026-0XX 2-28 Optional P aper T ray T wo Service Check Check the f ollowing bef ore ser vicing tr a y two: • Be sure tra y one is working correctly . • Be sure the second paper tra y is correctly installed and the sec- ond paper tra y connector on the base pr inter properly contacts the second paper tra y connector in the second paper tr a y . [...]

4026-0XX Diagnostic Inf ormation 2-29 2 Pa p er L i f t Plate Assem- bly Check the lift plate assemb ly , release button, button spring, release ar m and all related hard- ware f or proper operation. Be sure the lift plate D-roll pad mounted on the top of the lift plate is not worn, contaminated or missing. Repair as necessar y . 3 Pa p er E m p t [...]

4026-0XX 2-30 P aper T ra y T w o f eeds paper . - P aper does not reach the input sensor in the base printer . FRU Action 1 Second Pa p er T r ay Gear Assem- bly Be sure the second paper tra y drive assemb ly operates properly by manually f eeding paper through the second paper tra y . Repair as neces- sar y . 2 Second Pa p er T r ay D-Roll Be sur[...]

4026-0XX Diagnostic Inf ormation 2-31 P aper T ra y T w o selected in the application. P aper does not feed from T ray T wo b ut instead feeds from T ray One. T ray T w o reset to T ra y One in printer utility . FRU Action 1 Engine Board Be sure the voltage at CN9-8 on the engine board measures approximately 0 V dc. If incor- rect, turn the pr inte[...]

4026-0XX 2-32 Paper T ake-Up Solenoid Ser vice Chec k FRU Action 1 Solenoid Be sure the solenoid/engine board cable is firmly seated in connector CN3 on the engine board. Be sure the solenoid cable is fir mly seated in the solenoid/engine board cable connector at the solenoid. Check the solenoid f or proper mechanical oper- ation and that the solen[...]

4026-0XX Diagnostic Inf ormation 2-33 2 Engine Board Disconnect the solenoid/input sensor cable from CN3 on the engine board. Check the v oltage at CN3-5. The voltage should measure appro xi- mately +24 V dc. If incorrect, replace the engine board. If the voltage reads appro ximately +24 V dc, check the v oltage at CN3-6 while running a test page. [...]

4026-0XX 2-34 Parallel P or t Service Check 1. Do a print test to be sure the pr inter prints correctly . 2. Be sure the printer parallel cable is designed f o r bi-directional printing. 3. Be sure the user application is set up correctly . Improper set up can pre v ent establishing a comm unication link with the printer . 4. Be sure controller boa[...]

4026-0XX Diagnostic Inf ormation 2-35 Wrinkled P aper/En velope/T ransparency P aper Never Lea ves The T ray or Fails T o Reach The Input Sensor Note: Remov e the Optional Second P aper T ra y if installed bef ore perf orming t he f ollowing checks . FRU Action 1 P aper Check the paper supply f or wr inkled or damaged paper , out of specification p[...]

4026-0XX 2-36 P aper Never Reac hes The Exit Sensor P aper Jam In The Fuser Assembl y Any Jam After The Exit Sensor FRU Action 1 Input Sensor Check the input sensor f or proper operation. If incorrect, go to the “Input Sensor Ser vice Check” on page 2-20 . 2 D-Roll Assembly Chec k the D-Roll assemb ly f or proper operation. If incorrect go to t[...]

4026-0XX Diagnostic Inf ormation 2-37 P aper Feed Frame Assembl y Service Check 3 P aper F eed Exit Shaft/ Roller Assembly Check the paper f eed e xit shaft, rollers, and gear f or proper operation. Repair as necessary . 4 P aper F eed Exit Shaft Ground T er- minal Be sure the paper f eed e xit shaft ground termi- nal is properly installed. Note : [...]

4026-0XX 2-38 Print Quality Service Check Bef ore y ou perf or m the Print Quality Ser vice Chec k, do the f ollowing: • The toner car tridge can cause a variety of print quality prob- lems. Be sure the toner car tridge is in good condition, works correctly , and is not low on toner . If in doubt, install a new toner car tridge before y ou procee[...]

4026-0XX Diagnostic Inf ormation 2-39 Spot or Marks At Same Spot On Every Print Note: Do not e xpose the photoconductor to light any longer than necessar y when y ou remov e the photoconductor unit from the printer . Blank P age All Black P age Note: Incorrect laser e xposure or incorrect charging of the photo- conductor causes an all blac k page. [...]

4026-0XX 2-40 White or Black Lines or Bands Note: P oor image dev elopment, incorrect charging of the photocon- ductor , incorrect laser exposure , poor image transf er , or poor fusing causes white/blac k bands or lines. 2 Cables/Con- nectors Be sure the printhead cables to the engine board are properly seated. 3 HVPS Con- tacts Be sure the HVPS i[...]

4026-0XX Diagnostic Inf ormation 2-41 Offset Print 3 T ransf er Corona Cleaning Clean the corona wire to remov e any toner that has accumulated. Open the top cov er and locate the cleaning tool. Unsnap the cleaning tool from its holder . The corona wire is located directly in front of the transf er unit. Hook the cleaning tool under the transf er u[...]

4026-0XX 2-42 Excessive Backgr ound Note: P oor dev elopment or poor ly charged toner par ticles causes e xcessiv e backg round. This is more noticeable as the toner car- tridge nears end of life. White Spots Light Print FRU Action 1 T oner Car- tridge, Photo- conductor Unit Be sure the toner car tridge and photoconductor unit are installed correct[...]

4026-0XX Diagnostic Inf ormation 2-43 T oner on bac kside of printed page Note: T oner on the back of the printed page can be caused by poor fusing, improper de v elopment, or incorrect charging. 2 To n e r C a r - tridge Replace the toner car tridge if the car tridge is nearing the end of life . 3 T ransf er Assembly Chec k the transf er roll for [...]

4026-0XX 2-44 Registration Service Check Note: Use the Ser vice T est P age to check the registration. T ransfer Assembl y Service Check Note: The transf er assemb ly left and right transf er brac k et springs bias the transf er assembly tow ard the photoconductor unit. Be sure the transf er a ssemb ly is free to mov e and biased toward the photo- [...]

4026-0XX Diagnostic Inf ormation 2-45 T ransfer Corona Service Chec k R O MS I M MS e r v i c eC h e c k FRU Action 1 T ransf er Corona Be sure the transf er corona is clean. Clean with the transf er cleaning tool located on the upper fuser cov er . Check the high v oltage contacts for pitting, con- tamination, or damage. Be sure the corona assembl[...]

4026-0XX Diagnostic Aids 3-1 3. Diagnostic Aids This chapter e xplains the tests and procedures you can run to identify printer failures and v erify that repairs hav e corrected the problem. P ower -On Self T est (P ost) The printer performs the follo wing P owe r-On Self T est when powered on: 1. All LEDs come on solid. 2. The f an turns on for 2 [...]

4026-0XX Diagnostic Aids 3-2 16. Models 4026-06A, 06C, 06D and 06J , 070 and 071 - The Ready LED tur ns on solid and the Data LED b links. Go to Step 17. Models 4026-06B and 06F - The Ready LED tur ns on solid and t h eD a t aL E Db l i n k s . • The controller board check s flash ROM installation. • The controller board v erifies that flash is[...]

4026-0XX 3-3 Diagnostic T ests Printer Diagnostic T est The f ollowing tests run sequentially when perf orming this test: Standard Memor y T est Optional Memor y T est Microcode Check LED T est Read/Write ASIC Register T est Read/Write ASIC SRAM T est Read/Write controller board SRAM T est P erform the f ollowing steps to run the Printer Diagnostic[...]

4026-0XX Diagnostic Aids 3-4 Service Diagnostic T est P age The ser vice diagnostic test page includes registration marks to aid in adjusting print registration and also includes the installed pr inter base code le v el. The ser vice test page displa ys the user def ault v alues f or the f ollowing: T op Margin Offset Left Margin Offset Printer Pag[...]

4026-0XX 3-5[...]

4026-0XX Diagnostic Aids 3-6 User Mode Print T est P age The User Mode Print T est P age displa ys the user def ault values , installed options, printer f eatures, v ar ious typef aces, and the installed printer base code lev el. 1. Be sure the Ready LED is on solid (printer is in the ready state). 2. Press and release the operator panel b utton. 3[...]

4026-0XX 3-7[...]

4026-0XX Diagnostic Aids 3-8 P aper Feed Timing The f ollowing describes the timing of paper flow through the printer to aid in diagnosing paper jam problems . Detection of paper in the printer paper feed path is accomplished b y the low or high status condition of the paper entr y and paper e xit sensors. The timing of the paper as it leav es the [...]

4026-0XX 3-9 Fuser Operation Fuser Control The thermistor detects the hot roll temper ature and sends a corresponding analog signal to the engine board. The engine board turns the lamp on or off depending on the analog signal from the thermistor . If the ther mistor detects a high temperature f ailure but the fuser lamp does not tur n off , the the[...]

4026-0XX Diagnostic Aids 3-10 Configuration Mode The configuration mode giv es the ability to set the f ollowing printer functions through the operator panel: He x T race NP A Mode (Par allel) P arallel Protocol Advanced Status PPD A Activ ated A uto CRLF/LFCR P erform the follo wing steps to enter the configuration mode: 1. T ur n the printer powe[...]

4026-0XX 3-11 Operator P anel Configuration Mode Button Definition T erm Description Result Brief Button Press Press the operator panel button no longer than three seconds. This action mov es through the configura- tion mode va lue list. Long Button Press Press and hold the operator panel b utton f or more than three seconds. This action selects an[...]

4026-0XX Diagnostic Aids 3-12 Hex T race U s eH e xT r a c et oi s o l a t et h ec a u s eo fp r i n tp r o b l e m s .W h e naj o bi s printed, the pr inter operator panel displa ys the Hex T race indication, (Ready LED blinking), sho wing that the printer remains in the He x T race mode. T ur n the printer power off or do a front panel reset (lon[...]

4026-0XX 3-13 Restoring Factory Defaults Restoring factory defaults returns the pr inter settings to the original f actor y settings . P erform the f ollowing steps to in vok e f actory defaults: 1. T ur n the printer power off . 2. Open the top cov er . 3. T ur n the printer power on. The printer star ts POST . 4. The operator panel Error LED come[...]

4026-0XX Repair Information 4-1 4. Repair Inf ormation W ARNING: Read the f ollowing bef ore handling electronic par ts. Handling ESD-Sensitive P arts Many electronic products use parts that are known to be sensitiv e to electrostatic discharge (ESD). T o prev ent damage to ESD-sensitive par ts, f ollow the instructions below in addition to all the[...]

4026-0XX 4-2 Adjustment Pr ocedures CA UTION: Be sure to unplug the power cord whene ver you are working on the printer with one of the co vers remo ved. Print Registration Adjustment Print the ser vice diagnostic test page after you replace the engine board. Check the position of the bottom left and right registration lines. Adjust VR1 on the engi[...]

4026-0XX Repair Information 4-3 Remo v al Pr ocedures CA UTION: Be sure to unplug the power cor d whenever y ou are working on the printer with one of the co vers r emoved. Use caution when the photoconductor unit is out of the machine . Do not e xpose it to light f or more than 15 - 20 minutes . Screw Identification T able[...]

4026-0XX 4-4 Board Ca ge Remov al 1. Remov e the controller board. 2. Remov e the engine board. 3. Remov e the two remaining screws that hold the board cage to the mainframe. 4. Note the wa y the cables are routed to the engine board bef ore removing the board cage . 5. Remov e the board cage. Cover Remo vals Input P aper T ra y 1. Press the left a[...]

4026-0XX Repair Information 4-5 T op Co ver 1. Unplug the power cord from the machine . 2. Remov e the toner cartr idge and P .C. drum. 3. Remov e the left, right, and front cov ers. 4. Disconnect CN7, CN11, CN2, and CN8 from the engine board. 5. Remov e the fuser lamp cab le cov er . 6. Remov e the cab le cov er from the L VPS. 7. Disconnect the f[...]

4026-0XX 4-6 D-Roll Remov al 1. Remov e the paper f eed input tray assemb ly . 2. Remov e the paper lift plate assemb ly . 3. Remov e the manual f eed guide plate. 4. Remov e the engine board. 5. Remov e the controller board. 6. Remov e the paper f eed frame assembly . 7. Remov e the left side plate assembly . 8. Remov e the C-clip from both ends o[...]

4026-0XX Repair Information 4-7 Exit P aper Feed Roller Assembl y Remo v al 1. Remov e the transf er assembly . 2. Remov e the fuser upper and lo wer frame assemb lies. 3. Note the orientation of the notches in the left and r ight bushings . Reinstall with the notches f acing aw a y from the top cover . 4. Be sure the right end of the shaft contact[...]

4026-0XX 4-8 Fuser Lower Frame Assemb ly Remo v al 1. Remov e the top cover . 2. Remov e the fuser upper frame assembly . 3. Remov e the f our fuser lower frame assemb ly mounting scre ws. 4. Use a screwdriver to unlatch the left end of the fuser cab le cov er and remov e the cov er . 5. Remov e the fuser lower frame assemb ly . Fuser Upper Frame A[...]

4026-0XX Repair Information 4-9 HVPS Board Remo val 1. Unplug the power cord from the machine . 2. Re m ove th e H VP S co ver. 3. Disconnect CN1 from the HVPS board. 4. Disconnect the transf er assembly high voltage connector from T1 on the HVPS board. 5. Disconnect the red transf er assembly wire at TRET on the HVPS board. 6. Remov e the f our HV[...]

4026-0XX 4-10 LV P S R e m o v a l 1. Remov e the top cover . 2. Remov e the f our screws that secure the back of the rear frame to the L VPS. 3. Remov e the two scre ws that hold the top of the rear frame to the L VPS and remove the rear fr ame. 4. Remov e the two scre ws mounting the on/off s witch to the main frame . 5. Remov e the f our screws [...]

4026-0XX Repair Information 4-11 Operator P anel Remo v al 1. Unplug the power cord from the machine . 2. Remov e the toner cartr idge and P .C. drum. 3. Disconnect the operator panel cab le from the controller board. 4. Loosen the front operator panel mounting scre w from the board cage. 5. Remov e the rear operator panel mounting scre w from the [...]

4026-0XX 4-12 P aper Feed Frame Assembl y Removal 1. Unplug the power cord from the machine . 2. Remov e the paper f eed input tray assemb ly . 3. Remov e the paper lift plate assemb ly . 4. Remov e the manual f eed guide plate. 5. Disconnect the paper f eed sensor/solenoid cab le CN3 from the engine board. 6. Remov e the engine board. 7. Remov e t[...]

4026-0XX Repair Information 4-13 P aper Separator Remo v al 1. Remov e the paper f eed input tray assemb ly . 2. Remov e the lift plate assemb ly . 3. Remov e the manual f eed guide plate. 4. Remov e the engine board. 5. Remov e the controller board. 6. Remov e the paper f eed frame assembly . 7. Use a screwdriver to release either side of the sepa[...]

4026-0XX 4-14 Thermal Fuse Remov al (06A/06B/06D/06J/070) 1. Remov e the top cover . 2. Remov e the fuser upper frame assembly . 3. Remov e the two scre ws mounting the thermal fuse. 4. Remov e the thermal fuse. Thermostat Remov al (06C/06F/071) 1. Remov e the top cover . 2. Remov e the fuser upper frame assembly . 3. Remov e the two thermostat mou[...]

4026-0XX Repair Information 4-15 Models 4026-06C , 06F and 071 1. Open the top cov er . 2. Remov e the transf er cable cov er screw and transf er cab le cov er . 3. Remov e the two scre w s that hold the tr ansf er unit to the rear of the top cov er . 4. Unplug the wire to the transf er roll assemb ly . P a y attention to the wire routing. 5. Remov[...]

4026-0XX Connector Locations 5-1 5. Connector Locations Low Volta ge P o wer Supply Connector Pin No. Signal CN1 Engine Board 1+ 2 4 V d c 2G N D 3G N D 4+ 5 V d c 5F U S E R L A M P * CN2 Fuser Lamp/ Thermal Fuse 1H E A T N 2 NO CONNECTION 3H E A T L[...]

4026-0XX Connector Locations 5-2 High V oltage P ower Supply Connector Pin No. Signal CN1 Engine Board 1H V C 2H V T * 3H V S E L 2 * 4H V S E L 1 * 5H V B 6B I A S M O N 7G N D 8+ 2 4 V d c T T HV to TRANSFER CORONA CHARGE TRET TRET HV to TRANSFER CORONA HOUSING[...]

4026-0XX 5-3 Engine Boar d CN1A Controller Boar d Pin No. Signal Pin No. Signal 1 NO CONNECTION 16 CMD* 2 NO CONNECTION 17 CTBSY* 3 NO CONNECTION 18 PRINT* 4 NO CONNECTION 19 SRCLK* 5G N D 2 0 G N D 6 RESET* 21 GND 7 GND 22 VIDEO* 8G N D 2 3 + 5 V d c 9G N D 2 4 G N D 10 HSYND* 25 +5 V dc 11 EPRD Y* 26 GND 12 PRRD Y* 27 +5 V dc 13 TDD* 28 CPRD Y* 1[...]

4026-0XX Connector Locations 5-4 CN4A HVPS 1H V C 2H V T * 3H V S E L 2 * 4H V S E L 1 * 5H V B 6B I A S M O N 7G N D 8+ 2 4 V d c CN5A Laser Diode Drive Board 1S S C A N 2C O 3 LD APC2 (LD VR2) 4 LD APC1 (LD VR1) 5G N D 6L D A T A * 7+ 5 V d c CN6A Main Motor 1P H A S E A 2P H A S E A * 3P H A S E B 4P H A S E B * CN7A L VPS 1+ 2 4 V d c 2G N D 3G[...]

4026-0XX 5-5 CN9A 2nd P aper T ra y (Option) 1+ 2 4 V d c 2F E E D 2 * 3 NO CONNECTION 4+ 5 V d c 5G N D 6 P EMP2 7P S I Z E D 8 2NDBIN* 9 MM/INCH 10 CHECK0* 11 CHECK1* 12 CHECK2* CN10A P oly gon Motor 1 NO CONNECTION 2+ 2 4 V d c 3G N D 4+ 5 V d c 5 POL YGON CONTROL CN11A Fan Motor 1F A N * 2+ 2 4 V d c Connector Pin Signal[...]

4026-0XX Connector Locations 5-6[...]

4026-0XX 5-7 Second P aper T ray Sensor Boar d (Option) Controller Boar d Connector Pin No. Signal CN1A Engine Board 1 CHECK2* 2 CHECK1* 3 CHECK0* 4 MM/INCH 5 2NDBIN* 6P S I Z E O 7P E M P 2 8G N D 9+ 5 V d c 10 NO CONNECTION 11 FEED2* 12 +24 V dc CN3A P aper T ake-up S o l e n o i d-2 n dP a p e r Tr a y ( O p t i o n ) 1+ 2 4 V d c 2F E E D 2 * C[...]

4026-0XX Connector Locations 5-8 J4 Engine Board Pin No. Signal Pin No. Signal 1 NO CONNECTION 16 CMD 2 NO CONNECTION 17 CTBSY 3 NO CONNECTION 18 PRINT 4 NO CONNECTION 19 SRCLK 5G N D 2 0 G N D 6 RESET* 2 1 GND 7G N D 2 2 R V I D E O * 8G N D 2 3 + 5 V d c 9G N D 2 4 G N D 10 RHSYNC* 25 +5 V dc 11 EPRD Y* 26 GND 12 PRRD Y* 27 +5 V dc 13 T OD* 28 CP[...]

4026-0XX 5-9 J2 Pa rallel P ort Pin No. Signal Pin No. Signal 1 RSTROBE* 19 GND 2D 0 2 0 G N D 3D 1 2 1 G N D 4D 2 2 2 G N D 5D 3 2 3 G N D 6D 4 2 4 G N D 7D 5 2 5 G N D 8D 6 2 6 G N D 9D 7 2 7 G N D 10 RA CK* 28 GND 11 RBUSY 29 GND 12 RPERROR 30 GND 13 RSELOUT 31 RINIT* 14 RA UTOFD* 32 RF A UL T* 15 GND 33 GND 16 GND 34 GND 17 GND 35 GND 18 PLH 36[...]

4026-0XX Connector Locations 5-10[...]

4026-0XX 5-11 P aper Exit Sensor P aper Entry Sensor P aper Feed Solenoid Connector Pin No. Signal CN3S Engine Board 1 ANODE (PC3) 2G N D 3P C 3 * Connector Pin No. Signal CN1S Engine Board 1P C 1 * 2G N D 3 ANODE (PC1) Connector Pin No. Signal CN2S Engine Board 1+ 2 4 V d c 2F E E D 1 *[...]

4026-0XX P arts Catalog 6-1 6. P ar ts Catalog How T o Use This P ar ts Catalog • SIMILAR ASSEMBLIES: If two assemb lies contain a majority of identical par ts, the y are brok en down on the same list. Common par ts are shown b y one inde x number . P ar ts peculiar to one or the other of the assemb lies are listed separately and identified by de[...]

4026-0XX 6-2 Assembl y 1: Cover s[...]

P arts Catalog 6-3 Asm- Index Par t Number Units Description 1-1 69G8341 1 Left Side Cov er 1-2 69G9969 1 Cov er , Cable 06A/06B/06D/06J/070 1-2 11A7376 1 Cov er, Cab le 06C/06F/071 1-3 69G8301 1 T op Cover 06A/06B/06D/06J/070 1-3 11A7377 1 T op Cover 06C/06F/071 1-4 69G8306 1 F an Cover 06A/06B/06D/06J/070 1-4 11A7378 1 F an Cover 06C/06F/071 1-5 [...]

4026-0XX 6-4 Assembl y 1: Cover s (continued)[...]

4026-0XX P arts Catalog 6-5 Asm- Index Par t Number Units Description 1-18 69G8337 1 Gear , 15T 1-19 69G8338 2 Bushing 1-20 11A7404 1 T erminal, PWB-R to Fuser F rame 1-21 69G9998 1 T er minal, P aper Feed Exit Shaft to Board PWB-R 1-21A 11A7403 1 T er minal, T op Cov er Ground to PWB-T 1-22 69G9999 1 Board, PWB-R 1-23 69G9971 2 Exit P aper F eed R[...]

4026-0XX 6-6 Assembl y 2: Frame[...]

4026-0XX P arts Catalog 6-7 Asm- Index Par t Number Units Description 2-1 69G9962 1 Motor , Main Drive 06A/06B/06D/06J/070 2-1 11A7381 1 Motor , Main Drive 06C/06F/071 2-2 69G9691 1 Left Side Plate Motor Bracket 06A/06B/06D/ 06J/070 2-2 11A7382 1 Left Side Plate Motor Brack et 06C/06F/071 2-3 2 Screw , T ype 1308 PP 69G9974 2-4 1 Screw , T ype 3501[...]

4026-0XX 6-8 Assembly 2 : Frame (continued)[...]

4026-0XX P arts Catalog 6-9 Asm- Index Par t Number Units Description 2-10 1 Gear , 20/41T PP 69G9989 2-11 1 Gear , 29T PP 69G9989 2-12 1 Gear , 22/57T PP 69G9989 2-13 1 Gear , 44/109T PP 69G9989 2-14 1 Gear , 29/65T PP 69G9989 2-15 1 Gear , 25/72T PP 69G9989 2-16 1 Gear , 22/45T PP 69G9989 2-17 1 Gear , 50T PP 69G9989 2-18 69G8358 1 T erminal, Rt [...]

4026-0XX 6-10 Assembly 2 : Frame (continued)[...]

4026-0XX P arts Catalog 6-11 Asm- Index Par t Number Units Description 2-25 2 C-Clip, T ype 9107 PP 69G9986 2-26 69G8377 1 Clutch Cam Assembly 2-27 69G8379 1 Bushing 2-28 69G8393 1 D-Roll Shaft 2-29 69G9991 2 Pin, D-Roll Shaft 2-30 69G8375 1 D-Roll 2-31 69G8363 4 Rubber Foot 06A/06B/06D/06J 2-31 11A7467 4 Rubber F oot 06C/06F[...]

4026-0XX 6-12 Assembl y 3: Printhead[...]

4026-0XX P arts Catalog 6-13 Asm- Index Par t Number Units Description 3-1 69G8364 1 Pr inthead Assembly 600 dpi 3-2 5 Screw , T ype 3504 PP 69G9974 3-3 1 Screw , T ype 3519 PP 69G9974[...]

4026-0XX 6-14 Assembly 4: P aper Feed Input T ray[...]

4026-0XX P arts Catalog 6-15 Asm- Index Par t Number Units Description 4-1 11A7419 1 Lift Plate Assembly 4-2 69G8367 1 Pressure Spr ing 4-3 69G8394 1 Guide Plate, Manual Feed 06A/06B/06D/06J/ 070 4-3 11A7460 1 Guide Plate, Manual F eed 06C/06F/071 4-4 69G8366 1 Guide, Movab le Paper 4-5 3 Screw , T ype 3704 PP 69G9974 4-6 2 Screw , T ype 3504 PP 69[...]

4026-0XX 6-16 Assembl y 5: P aper Feed Frame[...]

4026-0XX P arts Catalog 6-17 Asm- Index Par t Number Units Description 5-1 69G8368 1 Paper F eed F rame Assembly 06A/06B/06D/ 06J/070 5-1 11A7384 1 Paper F eed Frame Assemb ly 06C/06F/071 5-2 69G8369 1 Gear, 16T T op P aper Feed 5-3 69G8371 1 Sensor, P aper Entr y 5-3A 11A7409 1 Cable, Input Sensor/Solenoid to Engine Board 5-4 69G8372 1 Flag, Paper[...]

4026-0XX 6-18 Assembl y 6: Fuser[...]

4026-0XX P arts Catalog 6-19 Asm- Index Par t Number Units Description 6-1 69G8312 1 Fuser Assembly , 120 V ac 06A/06B/06D/070 6-1 11A7390 1 Fuser Assembly , 120 V ac 06C/06F/071 6-1 11A7455 1 Fuser Assembly , 100 V ac 06J 6-1 69G8313 1 Fuser Assembly , 220/230 V ac 06A/06B/06D/ 070 6-1 11A7391 1 Fuser Assembly , 220/230 V ac 06C/06F/071 6-2 69G832[...]

4026-0XX 6-20 Assembl y 6: Fuser (continued)[...]

4026-0XX P arts Catalog 6-21 Asm- Index Par t Number Units Description 6-18 69G9978 1 Backup Roll 06A/06B/06D/06J/070 6-18 11A7397 1 Backup Roll 06C/06F/071 6-19 4 Screw , T ype 1305 PP 69G9974 6-20 69G8317 1 Ther mistor 06A/06B/06D/06J/070 6-20 11A7398 1 Thermistor 06C/06F/071 6-21 69G8330 1 Separator , P aper 6-22 1 Screw , T ype 3504 PP 69G9974 [...]

4026-0XX 6-22 Assembly 7: Electr onics[...]

4026-0XX P arts Catalog 6-23 Asm- Index Par t Number Units Description 7-1 69G8380 1 Po wer Supply , 120 V ac U.S. 7-1 69G8382 1 Po wer Supply , 220/230 V ac W .T . 7-1 11A7454 1 P ower Supply , 100 V ac Japan 7-2 1339526 1 P ow er Cord; U .S., AP-T aiwan, Austr alia, Bolivia, Brazil, Canada, Columbia, Costa Rica, Ecuador , El Salvador , Guatemala,[...]

4026-0XX 6-24 Assembly 7: Electr onics (continued)[...]

4026-0XX P arts Catalog 6-25 Asm- Index Par t Number Units Description 7-15 11A7417 1 T er minal, Rear F rame Ground to Control Card Cage 7-12 2 Screw , shouldered cable mtg. PP 69G9974 7-13 11A7406 1 Cable, T ransfer Assemb ly to HVPS 7-14 1 Screw , T ype 3501 PP 69G9974 7-16 11A7418 1 Cov er , L VPS Edge 7-17 69G9985 1 Controller Board Cage 7-18 [...]

4026-0XX 6-26 Assembly 8: T ransfer Assembl y[...]

4026-0XX P arts Catalog 6-27 Asm- Index Par t Number Units Description 8-1 69G8307 1 T ransf er Assembly 06A/06B/06D/06J/070 8-1 11A7452 1 T ransfer Assembly 06C/06F/071 8-2 69G8310 1 Right T ransf er Frame Guide 06A/06B/06D/06J/ 070 8-3 2 Screw , T ype 3704 PP 69G9974 06A/06B/06D/ 06J/070 8-4 69G8311 1 Spr ing, Right T ransfer Guide 06A/06B/06D/ 0[...]

4026-0XX 6-28 Assembly 9: Option - Second P aper Drawer[...]

4026-0XX P arts Catalog 6-29 Asm- Index Par t Number Units Description 9-1 69G9929 1 Frame , Base 9-2 69G9927 2 Foot, square rubber 9-2A 11A7416 2 Foot, round rubber 9-3 7 Screw , T ype 3704 PP 11A7434 9-4 69G9926 1 Right Side Cover 9-5 69G9937 1 Lift Plate Assemb ly 9-6 69G9928 1 T ra y , P aper 9-6A 11A7428 1 P ad 9-6B 11A7429 1 Label, Paper Set [...]

4026-0XX 6-30 Assembly 9: Option - Second P aper Drawer (continued)[...]

4026-0XX P arts Catalog 6-31 Asm- Index Par t Number Units Description 9-14 2 Screw , T ype 1 305 PP 11A7434 9-15 69G9942 1 Stud, Solenoid Mounting 9-16 69G9965 1 Lev er , Lift Plate Release 9-17 1 C-Clip, T ype 9105 PP 69G9986 9-18 2 Screw , T ype 3 504 PP 11A7434 9-19 69G8370 1 Solenoid 9-20 69G9958 1 Lev er , Knockoff 9-21 69G9963 1 Button, Lift[...]

4026-0XX 6-32 Assembly 9: Option - Second P aper Drawer (continued)[...]

4026-0XX P arts Catalog 6-33 Asm- Index Par t Number Units Description 9-37 69G9959 1 Bracket, Sensor Flag 9-38 69G9960 1 Sensor Flag 9-39 69G9935 1 Ground T erminal 9-40 4 Screw , T ype 3 501 PP 11A7434 9-41 69G9934 1 Sensor/Interface Board 9-42 69G9940 1 Cover , F ront. 9-43 69G9939 1 Paper F eed Assembly , complete 9-44 11A7427 1 Guide Plate[...]

4026-0XX 6-34 Assembl y 10: Options Asm- Index Par t Number Units Description 10 1364936 1 Memor y SIMM, 1MB 10 1364906 1 Memor y SIMM, 2MB 10 1364907 1 Memor y SIMM, 4MB 10 1368706 1 Ser ial Adapter[...]

4026-0XX P arts Catalog 6-35 Assembly 11: Miscellaneous Asm- Index Par t Number Units Description 11 69G9986 1 P ar ts P ac ket, C-Clips f or printer and Second P aper Dra wer 11 69G9987 1 P ar ts P ac ket, Springs 11 69G9988 1 P ar ts P ac ket, Fuser Gears 11 69G9989 1 P ar ts P acket, P aper Feed Gears 11 69G9974 1 P ar ts P acket, Scre ws 11 11A[...]

X-1 4026-0XX Inde x A Acronyms 1-2 Adjustment Procedure 4-2 Print Registration 4-2 C Configuration Mode 3-10 Connector Locations Controller Board 5-7 Engine Board 5-3 High V oltage P ower Supply 5-2 Low V oltage P ower Supply 5-1 P aper Entry Sensor 5-11 P aper Exit Sensor 5-11 P aper F eed Solenoid 5-11 Second P aper T ray Option 5-7 Controller Bo[...]

X-2 4026-0XX Fa n 4-7 Fuser Lamp 4-7 Fuser Lower F rame Asm 4-8 Fuser P aper Separator 4-8 Fuser Upper F rame Asm 4-8 HVPS Board 4-9 HVPS Cov er 4-9 Left Side Plate 4-9 LV P S 4-10 Main Drive Motor 4-10 Main Drive/P aper Feed Gears 4-10 Manual P aper F eed Plate 4-10 Operator P anel 4-11 P aper Entry Sensor 4-11 P aper Entry Sensor Flag 4-11 P aper[...]