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Service Manual Phaser 3425

1. 7 2 MEAL AA 7 2 Printing a Cleaning Sheet 7 3 8 Service Parts Disassembly QVEIVIOW ceri pascaroientodesedae d bat hate haie 8 2 Standard Orientation of the Printer 8 2 General Notes on Disassembly 8 3 PREPARAUION wg S NANA ete date Oe doe eau die Sa dee maman 8 3 Removing Service Parts and Consumables 8 4 Print Cartridge Removal PL 9 1 8 8 4 Transfer Roller Removal PL 9 1 23 8 4 Fuser Removal PL 9 3 40 8 5 Contents xv Print Engine Disassembly 8 7 Right Cover Assembly PL 9 2 2 8 7 Left Cover Assembly PL 9 2 4 8 8 Top Cover Assembly PL 9 2 1 8 9 Tray 1 Cover Assembly PL 9 1 2 8 10 Retard Assembly PL 9 3 7 8 12 Front Inner Cover PL 9 2 5 8 12 Tray 1 Lift Plate PL 9 1 3 8 13 Rear Cover Assembly PL 9 2 3 8 14 Front Panel Assembly PL 9 2 1 8 8 15 Cover Open Interlock Switch PL 9 2 1 16 8 16 NIC Board PL 9 1 41 8 17 Main Board PL 9 1 10 8 18 Main Drive Assemb
2. 4 6 Paper Mis feed from Tray 1 MPT 4 6 Paper Mis feed from Tray 2 4 7 Paper Mis feed from Tray 3 Optional Feeder 4 8 Jam At Tray 1 2 3 Jam 0 4 9 Jam At Top Jam 1 4 10 Jam At Exit Jam 2 2 2 eee eee 4 11 Jam At Duplex Duplex Jam 1 4 12 Jam At Tray Remove Tray 2 Duplex Jam 2 4 13 CRUM Toner Error 4 14 5 Print Quality Troubleshooting Print Quality Problems Overview 5 2 Defects Associated with Specific Printer Components 5 2 Front Panel Test Print 5 3 DEIBLIONS dine 245 poule pened heal Edi KR beeen plead blade 2 5 4 FUSING aa nkk Pa Kina ha bah bn de ee ee baa ek anne 5 5 RESONON x e handy Len Va RU EL DR le kaing 5 5 Registration and Skew 5 6 Skips or Smears 5 6 Print Quality Troubleshooting 5 7 6 Adjustments and Calibrations Margin Calibration 6 2 Resetting NVRAM 6 2 digo vated iio Weis coco dde 6 2 7 Cleaning and Maintenance Service Preventive Maintenance Procedure 7 2 Recommended Tools
3. 2 5 Process Control 2 5 Toner Control naaa 2 5 Fuser Control 2 5 Paper Path of the Printer 2 6 Duplex Paper Path 0 K R NN NK R RRR RR R NR R RRR 2 6 Contents xiii xiv Major Assemblies and Functions 2 7 Main Board 2 7 Print Cartridge 2 10 Laser Scan Unit LSU 2 10 Transfer Roller 2 11 Fuser ASSEMDIY sas sine decree daw RE DPEN DANE RAANG 2 11 Paper Feed Drive 2 11 Paper Out Sensor 2 11 Paper Feed Sequence 2 12 Registration Sensor 2 12 Paper Transport 2 12 Fuser Exit Sensor 2 13 Duplex Unit 2 13 3 Error Messages and Codes Introduction 3 2 Servicing Instructions 3 4 Using the Troubleshooting Procedures 3 5 General Notes on Troubleshooting 3 6 Voltage Measurements 3 7 Service Diagnostics
4. 3 8 Service Diagnostic Front Panel Button Descriptions 3 9 Service Diagnostics Menu Map 3 9 Error Messages and Codes Summary Table 3 13 Fuser Failure Low Heat or Overheat 0x56 0x57 0x58 3 14 LSU Error or OX5A 3 15 Jam At Tray 1 2 3 or 0x01 3 16 Jam At Top 0x02 or Jam At Exit 0x03 3 17 Jam At Duplex 0x04 or Jam At Tray 0x05 3 18 Output Tray Is Full or 0X44 3 19 Replace Print Cartridge 0x53 or Invalid Print Cartridge 0x55 3 20 4 General Troubleshooting ULAT 4 2 Preliminary Procedures 4 2 Front Panel Troubleshooting 4 3 No Front Panel Display after Power is Turned ON 4 3 Front Panel LED is On Front Panel Display is Blank 4 3 Front Panel Continually Displays Close Cover or Check Cartridge 4 3 Front Panel Continually Displays No Paper in Tray x 4 3 Front Panel Continually Displays Output Tray Is Full 4 4 Paper Size Switch Assembly 4 4 Power Supply Troubleshooting 4 5 Phaser 3425 Laser Printer Media Jams and the Paper Path 4 6 Media based Problems
5. Parts Lists 9 19 Power Supply Duplex Assembly s3450 190 Service Parts List 9 9 HVPS Duplex Assembly 5 zr co xD 2 88 amp ou A 3 9222 Z Z Din a O QO A pus o o a D lre O aa D D Q Q ES a 55 TT a 5 gt gt 5 2e EN 3 6 99 5 oS a a O Oo VV oO aa jaa A O gt gt gt gt 2 n ao TI 2 22 5 Sa r EN a aa 33 T gt nu WA o 60 6 3 Z ca ou a x ye N Phaser 3425 Laser Printer Service Manual 9 20 Paper Tray 3450 191 Service Parts List 9 10 Paper Tray No Name Description Qty Part Number 0 Paper Tray with 1 26 1 109R00722 Parts Lists 9 2 Optional Lower Feeder Assembly 3450 192 Phaser 3425 Laser Printer Service Manual 9 22 Service Parts List 9 11 Optional Lower Feeder No Name Description Qty Part Number 0 500 Sheet Feeder with paper tray 1 097S03131 1 PMO Frame SCF NS 2 Tray 3 Feed Assy 1 059K39120 3 Spring Pick Up NS 4 PMO Bushing TX NS 5 Shaft Pick Up NS 6 PMO Bearing Shaft NS 7 MEA Unit Roller Feed NS 8 Bearing Pick Up NS 9 PMO Guid Inner SCF NS 10 Tray 3 Retard Assy 1 022E29540 11 Coupling Retard Shaft SCF NS 12
6. Procedure Step Action and Questions Yes No 1 Is the Duplex Sensor Actuator damaged or Repair or Go to Step 2 binding replace the actuator and or sensor 2 Use the embedded diagnostics to check the Go to Step 3 Replace Duplex Duplex Sensor Is the sensor operational Sensor 3 Inspect the Duplex Assembly Is any paper Remove Go to Step 4 wrapped around the Duplex rollers obstruction and clean rollers 4 Is the Duplex Roller operational rotates freely Go to Step 5 Replace Duplex without binding Assembly 5 Does the Feed Roller Assembly operate Replace Print Replace the properly without binding Engine Feed Roller Controller Assembly Board General Troubleshooting 4 13 CRUM Toner Error Troubleshooting References Applicable Parts Wiring and Plug Jack Map References Print Cartridge Toner Sensor Harness Print Cartridge Interconnect Board Procedure Step Action and Questions Yes No 1 Open the top cover and ensure that the Print Complete Go to Step 2 Cartridge is properly seated Does the error clear after reseating the cartridge 2 Reseat all harness connections to the Print Complete Go to Step 3 Cartridge Interconnect Board Does the error clear 3 Check continuity between the Print Cartridge Go to Step 4 Replace Interconnect Board and CN6 on the Main Board Harness Does the harness show continuity 4 Check Print Cartridge Does the cartridge Replace Print Replace Print conta
7. Phaser 3425 Laser Printer Service Manual Warning The following servicing instructions are for use by qualified service personnel only To avoid personal injury do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so PDF Creation December 2005 Part Number N A Copyright Copyright 2003 Xerox Corporation All Rights Reserved Unpublished rights reserved under the copyright laws of the United States Contents of this publication may not be reproduced in any form without permission of Xerox Corporation Copyright protection claimed includes all forms of matters of copyrightable materials and information now allowed by statutory or judicial law or hereinafter granted including without limitation material generated from the software programs which are displayed on the screen such as styles templates icons screen displays looks etc XEROX The Document Company the stylized x CentreWare Made For Each Other and PhaserSMART are registered trademarks of Xerox Corporation infoSMART Phaser PhaserPort and Phaser Tools are trademarks of Xerox Corporation Adobe Reader Illustrator PageMaker Photoshop PostScript ATM Adobe Garamond Birch Carta Mythos Quake and Tekton are registered trademarks and Adobe Jenson Adobe Brilliant Screens technology and IntelliSelect are trademarks of Adobe System
8. 1 8V USB clock 12MHz OSC FS781 Frequency System clock Scaling EMI 12MHz al Main Attenuator Board nFSYNC VCLK Video Clock Memory Data Bus 78MHz 32 DRAMD 0 31 ADDR 1 13 2 100PIN DIMM Memory Address Bus 9 QS 64Mbit SDRAM DRAMA 0 11 11 DATA 16 31 z SDRAM CAS SDRAM RAS KO KAS641632C BA0 B 1 SDRAM WE SDRAM _CS 0 1 SDQM 0 3 o 64Mbit SDRAM sb cuc NARE ca nW AIT i nRD K 49641632C 17 w Rl o NPC_RESET EIRQ 0 3 Iocs 3 a nlOCS 0 5 EIO z XC61FN3112MR RESET ACK BUSY SELECT ERROR FAULT 12 i 74ACT245 Centionics gt Aa LREADY SYNC VDO P MOT CLK Laser Connector SEENE STROBE 6 AUT OFD INI UART 24 HVPS Interface PANEL 5Pin Power Supply Board 3450 166 Main Board Wiring Diagram 2 8 Phaser 3425 Laser Printer Service Manual Print Engine Control Function The Print Engine Control function is composed of two sections m Power Distribution m Engine Control The power distribution section receives AC voltage and creates the required DC outputs 3 3 VDC 5 VDC and 24 VDC to power the printer components It also supplies AC voltage to the Fuser assembly The engine control section provides all of the principle operating voltages and control signals for the following printer operations Main Drive Motor Fuser Assembly High Voltage Power Supply HVPS Laser Scanner Unit LSU Sensors Solenoids Thermistor All parts related to
9. 4 11 Jam At Duplex Duplex Jam 1 Paper jams in the Exit Transport Assembly or before or in the Duplex Feed Rollers s3450 167 Troubleshooting References Applicable Parts Wiring and Plug Jack Map References Exit Sensor Actuator Exit Roller Assembly Transport Roller Assembly Main Board Procedure Step Action and Questions Yes No 1 Is the Exit Sensor Actuator damaged or binding Repair or Go to Step 2 replace the actuator and or sensor 2 Inspect the Exit Roller Assembly Is it damaged Replace the Exit Go to Step 3 or binding Roller Assembly 3 Inspect the Duplexer Is any paper wrapped Remove Go to Step 4 around the Duplex Rollers obstruction and clean rollers 4 Is the Transport Roller Assembly operational Go to Step 5 Replace rotates freely without binding Transport Roller Assembly 5 Use the embedded diagnostics to check the Replace Main Replace Exit Fuser Exit Sensor Is the sensor operational Board Sensor 4 12 Phaser 3425 Laser Printer Service Manual Jam At Tray Remove Tray 2 Duplex Jam 2 Paper Jam between the Duplex Feed Rollers and the Registration Rollers Troubleshooting References s3450 168 Applicable Parts Wiring and Plug Jack Map References Duplex Exit Sensor Actuator Duplex Assembly Feed Roller Assembly Print Engine Controller Board
10. 5 7 Printer Configurations 1 3 Printer Controls 2 4 Printer Engine Controller Board 1 7 Printer Introduction and Overview 1 2 Printer Specifications 1 11 Printing a Cleaning Sheet 7 3 Print Quality Problems Overview 5 2 Process Control 2 5 R Rear Cover Assembly 8 14 Reassembly 8 6 Index 2 Registration Roller Assembly 8 30 Registration Sensor 2 12 8 31 Registration Feed Jam Jam 0 4 9 Removing Routine Maintenance Items and Consumables 8 4 Resetting NVRAM 6 2 Retard Assembly 8 12 Right Cover Assembly 8 7 Routine Maintenance Items 1 8 S Selective Control 2 4 Service Diagnostic Front Panel Key Descriptions 3 9 Service Diagnostics 3 8 Service Diagnostics Menu Map 3 9 Service Diagnostics PostScript NVRAM Resets 6 2 Service Preventive Maintenance Procedure 7 2 Servicing Instructions 3 4 Simplex Jam 1 0x0000020 or Jam 2 0x0000040 3 17 Standard Orientation of the Printer 8 2 Sub Fan Assembly 8 24 Summary of the Printing Process 2 2 Supply Life Counter Behavior 1 10 System Controller Board 2 7 T Toner Control 2 5 Toner Sensor Assembly Kit 8 29 Top Cover Assembly 8 9 Transfer Roller 2 11 Transfer Roller Removal 8 4 Transport Roller Assembly 8 25 Tray 1 Assembly 8 10 9 9 Tray 1 Cover Assembly 8 10 Tray 1 Feed Roller Assembly 8 31 Tray 1 Lift Plate 8 13 Tray 1 Pickup Roller 8 35 Tray 1 Retard Assembly 8 12 Tray 2 Feeder 9 21 9 22 Service Ma
11. If an error message or code is not visible on the front panel the Fault History and Jam History list errors reported by the printer The error codes that will display when viewing the Fault History and Jam History logs and the equivalent Printer Error Messages are listed in the following code conversion tables Fault History Code Printer Error Message 41 Insufficient Memory 44 Output Tray Is Full 5A Laser Failure 53 Replace Print Cartridge 55 Invalid Print Cartridge 56 Fuser Failure Open Fuser Error 57 Fuser Failure Low Heat Error 58 Fuser Failure Over Heat Error Jam History Code Jam Error Message 01 Jam At Tray 1 2 or 3 02 Jam At Top 03 Jam At Exit 04 Jam At Duplex 05 Jam At Tray Remove Tray 2 3 2 Phaser 3425 Laser Printer Service Manual When an error first occurs record the error message and code then cycle power to the printer to see if the error recurs Fault History can be accessed one of two ways Accessing Fault History 1 View the printer s fault history on the front panel a Go to Troubleshooting gt Service Tools gt Fault History or Jam History Or 2 If the printer is connected to a network and has a TCP IP address view the printer s web page using a web browser a Open a web browser b Enter the printer s IP address as the URL c Select the Troubleshoot link and the fault history will be displayed Error Messages and Codes 3
12. Roller The PTL exposes the drum surface after the latent image has been developed to lower surface potential of the drum This provides enhanced transfer efficiency The transfer roller provides a high positive potential on the back of the print media This potential attracts the negatively charged toner image from the drum and deposits it on the surface of the print media Fuser Assembly The Fuser Assembly contains the entire Fuser Subsystem and is a field replaceable Service Part The Fuser Assembly contains the following components m Heat Lamp and Heat Roller a halogen lamp generates the heat for the heat roller The Heat Roller melts the toner so it adheres to the paper m Pressure Roller provides pressure on the opposite side of the print media so the heat roller can embed the melted toner in the media m Thermistor monitors the surface temperature of the Heat Roller This information is used to control the heat lamp and thus keep the heat roller at the correct temperature m Thermostat prevents overheat damage when unexpected system faults occur Paper Feed Drive The drive for all rollers is provided by the main drive motor and a series of drive gears When the main motor turns all the paper path components also turn except the Pick Up Roller The Pick Up Roller assembly includes a mechanical clutch released by the paper feed solenoid Paper Out Sensor The paper supply is monitored by the Paper Out Sensor When the t
13. Service Parts List 9 1 Main Unit No Name Description Qty Part Number 1 Base Housing 1 NS 2 Tray1 Cover Assy with 2 1 2 2 1 53 Sra 3 Tray 1 Assembly with 3 1 3 6 1 050K55430 4 Tray 1 Link Left 1 NS 5 Tray 1 Link Right 1 NS 6 Paper Tray 1 109R00722 7 Frame Assy 1 NS 8 Print Cartridge 5K 1 106R00687 Print Cartridge 10K 1 106R00688 9 Reg Transport Assy 1 059K39130 10 Main Board Duplex 1 960K12200 Main Board Non Duplex 1 960K12360 11 Main Drive Motor Assembly 1 127K44860 12 Exit Motor Assembly 1 127K44870 13 Power Supply Board 110 Volts 1 105K27080 Power Supply Board 220 Volts 1 105K27090 14 Duplex Guide Plate with 14 1 14 3 1 NS 15 Bracket Dummy Control NS 16 Laser Assembly 1 122K02450 17 Cross Bar 2 NS 18 Tray 2 Empty Actuator 1 120E26090 19 Fan DC Main 1 127E14630 20 Stopper Fan NS 21 Gear Transfer Rol 1 007N01013 22 Gear Regi Z25 NS 23 Transfer Roller 1 022E29520 24 Transfer Roller Bearing Right with 24 1 24 4 1 019E63470 25 Transfer Roller Bearing Left with 25 1 25 3 1 019E63480 26 Cap M Gear 1 807E06450 27 Gear Assembly 1 007K13470 28 Tay 2 Solenoid 1 121E19250 29 Tay 1 Solenoid 1 121E19260 Parts Lists 9 5 Service Parts List 9 1 Main Unit Continued No Name Description Qty Part
14. Shaft Gear Retard NS 13 Gear Pick Up Cam SCF NS 14 Tray 3 Solenoid 1 121E19260 15 Shaft Feed SCF NS 16 Tray 3 Feed Clutch 1 121E19270 17 Gear Regi Z25 NS 18 ELA Unit Bracket SCF NS 18 1 Tray 3 Feed Motor 1 127E14650 19 IPR GND Spring Feed NS 20 Photo Interrupter NS 21 Tray 3 Control Board 1 960K12220 22 Tray 3 Interface Cable 1 962K26730 23 Cable Photo Interrupter NS 24 Tray 3 Empty Actuator 1 120E26100 25 IPR GND Top NS 26 Foot Rubber Hawk 16 NS 27 IPR Bar Cross Bottom NS 28 PMO Cover L SCF NS 29 PMO Cover R SCF NS Parts Lists 9 23 Service Parts List 9 11 Optional Lower Feeder Continued No Name Description Qty Part Number 30 PMO Cover Dummy SCF NS 31 CBF Harness SCF GND NS 32 CBF Harness LIU GND NS 33 CBF Harness OPE NS 34 Bush Cable NS 35 ELA HOU CST Sensor Hawk 16 NS 36 Harness Paper Size NS 101 Screw Taptite NS 102 Screw Taptite NS 103 Screw Machine NS 104 E ring NS 105 E ring NS 9 24 Phaser 3425 Laser Printer Service Manual Xerox Supplies Repair Kits World Kits and Repackaging Kits Description Part Number World Kit N A Phaser 3425 Getting Started Pack N A Cushion Main Repackaging Phaser 3425 095N00276 Main Shipping Box Repackaging 095N00275 High Capacity Print Cartridge Box N A Standard Capacity Print Cartridge Box N A 500 Sheet Paper Tray Box N A 550 Sheet Feeder Box N A Transf
15. Tray 2 must be removed in order to remove the Front Cover 1 Remove the Print Cartridge page 8 4 and protect it from light 8 12 Phaser 3425 Laser Printer Service Manual 2 Remove the Tray 1 Cover Assembly page 8 10 3 Remove the Top Cover Assembly page 8 9 4 Disconnect the Tray 1 Lift Plate Links from the Tray 1 Lift Plate by pulling outward on the end of the Link arms where they connect to the lift plate 5 Rotate each Link to align the key with the slot in the frame mounting hole and remove the Links 6 Remove the two screws securing the Front Cover to the printer unlatch the two retaining hooks on each side and remove the Front Cover 53450 042 Tray 1 Lift Plate PL 9 1 3 1 Remove the Front Inner Cover page 8 12 2 Disconnect the 2 Bias Springs from the metal frame Note In some cases the Bias Springs will slip off of the plastic mounting arms on the Lift Plate easily and they can be disconnected just as readily that way However there is less chance of damage when removing the springs from the metal frame 3 Remove the Tray 1 Lift Plate Service Parts Disassembly 8 13 Rear Cover Assembly PL 9 2 3 1 Open the rear cover and remove the screw that secures the strap to the rear of the printer Note You can also pry the cover end of the strap off the retainer and slide it free of the cover while leaving it and the screw attached to the rear of the printer 3450
16. 031 8 14 Phaser 3425 Laser Printer Service Manual 2 Rotate the rear cover until the flat surface of the left hinge pin refer to standard orientation drawing on page 8 2 aligns with the slot as shown in below Pull up on the left side of the cover to free the left hinge pin 3450 032 3 Slide the rear cover to the left to free the right hinge pin see above and remove the rear cover 4 If you are replacing the rear cover assembly remove the strap for use on the new cover assembly Pry the top end of the strap off of the retaining boss on the rear cover Slide the strap down to remove it from the rear cover Front Panel Assembly PL 9 2 1 8 1 Remove the Print Cartridge page 8 4 and protect it from light 2 Remove the Top Cover Assembly page 8 9 Service Parts Disassembly 8 15 3 Remove the 6 screws that secure the Front Panel Assembly to the Top Cover and remove the Front Panel Assembly we 3 s3450 170 1 Button Panel 2 LCD Panel Cover Open Interlock Switch PL 9 2 1 16 Note It is not mandatory to remove the Top Cover to access the interlock switch however the Right Cover must be removed in order to disconnect the interlock switch connector CN 2 from the Cover Interconnect Board Routing the switch cable to the Main Board is easier with the Top Cover removed 1 Remove the Print Cartridge page 8 4 and protect it from light 2 Remove the Top Cover Assembly page 8 9 3 Open t
17. 1 19 1 Remove the Top Cover Assembly page 8 9 2 Disconnect the Main Fan connector CN 15 from the Main Board see Map 1 Main Board on page 10 3 Note If you wish you can loosen the screws securing the Laser Assembly and tilt it to provide additional access to remove the cable This will be necessary when routing the cable back under the Laser Assembly during reinstallation Service Parts Disassembly 8 23 3 Remove 1 screw securing the Fan retainer stopper and remove the fan to the left while feeding the cable through the printer from the right side s3450 197 1 Stopper 2 Main Fan Reinstallation Notes Note If not already done during removal loosen the screws securing the Laser Assembly sufficiently to route the fan cable under the laser Sub Fan Assembly PL 9 3 35 1 Remove the Top Cover Assembly page 8 9 2 Disconnect the Sub Fan connector CN 21 from the Main Board Note If you wish you can loosen the screws securing the Laser Assembly and tilt it to provide additional access to remove the cable This will be necessary when routing the cable back under the Laser Assembly during reinstallation 8 24 Phaser 3425 Laser Printer Service Manual 3 Remove screw securing the Fan retainer stopper and remove the fan to the left while feeding the cable through the printer from the right side 3450 198 1 Stopper 2 Sub Fan Reinstallation Notes Note If not already done during re
18. 15 Main Drive 9 16 Main Drive Assembly 8 19 Main Unit 9 4 Major Assemblies and Functions 2 7 Map 1 Main Board 10 3 Map 2 Connector Board 10 4 Media and Tray Specifications 1 14 Media Jams and the Paper Path 4 6 Media based problems 4 6 N NIC Board 8 17 No Front Panel Display after Power is Turned ON 4 3 O Open Fuser or 0x0000001 3 14 Out Bin Full or 0x0001000 3 19 3 20 Overview of the Phaser 3425 Laser Printer 2 2 P Paper Empty Tray 2 0x0000400 or Tray Phaser 3425 Laser Printer 3 0x0000800 3 19 3 20 Paper Feed Drive 2 11 Paper Feed Sequence 2 12 Paper mis feed from Tray 1 MPT 4 6 Paper mis feed from Tray 2 4 7 Paper mis feed from Tray 3 Optional Feeder 4 8 Paper Out Sensor 2 11 Paper Path of the Printer 2 6 Paper Pick 2 4 Paper Size Control 2 4 Paper Size Sensor 8 22 Paper Size Switch Assembly 4 4 Paper Transport 2 12 Parts of the Printer 1 4 Phaser 3425 Front Panel Configuration 1 5 Phaser 3425 Laser Printer Rear View 1 6 Physical Dimensions and Clearances 1 11 POST Diagnostic Test Descriptions 4 2 PostScript NVRAM Resets 6 2 Power Supply Troubleshooting 4 5 Preliminary Procedures 4 2 Preparation 8 3 Print Cartridge 2 10 Print Cartridge Removal 8 4 Print Engine Controller Board 2 9 8 18 Print Engine Disassembly 8 7 Print Engine Interconnect Diagram 10 2 Print Engine Parts 9 4 Print Modes 2 3 Print Quality Troubleshooting
19. 2 Bottom Cross Bars from the printer Caution The Tray Full actuator is exposed with the top cover removed Be careful when you turn the printer over to avoid damaging the actuator s3450 172 8 38 Phaser 3425 Laser Printer Service Manual 6 39 3450 174 53450 081 the front corners of the Duplex Guide Plate side of the printer Plate 8 Remove the Duplex Guide Plate from the printer 5 With the printer upside down disconnect 2 springs from the pickup assembly to 7 Remove the screw securing the ground wire on the right side of the Duplex Guide 6 Using a screwdriver pry up the locking tab and remove the stopper on the left Service Parts Disassembly side of the printer Pull out to free the bearing from the chassis then rotate the 9 Pull out on the top of the bearing retainer for the Feed Roller Shaft on the right bearing to the rear and remove it from the shaft ra N 6 D o a 2 Pick Up Roller Feed Roller 1 10 Remove 4 screws securing the Paper Pick Assembly slide the assembly to the right side of the printer lift the left end and slide the assembly up and out to the left side of the printer D aa Wi V N X oN NA Phaser 3425 Laser Printer Service Manual 6 40 Reassembly Notes Note When reinstalling the Duplex Guide Plate make sure the plate is past the flange before you reinstall the sp
20. 3 Servicing Instructions The Service Flowchart is an overview of the path a service technician should take using this technical manual to service the print engine and options If you choose not to use the Service Flowchart it is recommended that you start at the appropriate troubleshooting table and proceed from there Always follow the safety measures detailed in the front of the manual when servicing the printer See Service Safety Summary on page vii Step 1 Identify the Problem oo Se eS a Verify the reported problem does exist Check for any error codes and write them down Print normal customer prints and service test prints Make note of any print quality problems in the test prints Make note of any mechanical or electrical abnormalities present Make note of any unusual noise or smell coming from the printer View the fault history and jam history under the Service Tools Menu Verify the AC input power supply is within proper specifications by measuring the voltage at the electric outlet while the printer is running Step 2 Inspect and Clean the Printer ae NO ES S B M Switch OFF printer power Disconnect the AC power cord from the wall outlet Verify the power cord is free from damage or short circuit and is connected properly Remove the Print Cartridge and protect it from light Inspect the printer interior and remove any foreign matter such as paper clips staples pieces of pape
21. 3 IPR Terminal FU NS 4 PMO Housing Terminal NS 5 CBF Harness Fuser 220V NS 6 Foot ML 80 NS 7 Retard Feeder Assy with 7 1 7 8 1 019N00853 8 Guide P Transfer NS 9 PMO Holder Plate Saw NS 10 IPR Plate Saw NS 11 12 13 14 Guide P Regi Upper NS 15 Spring ETC Lever NS 16 Holder M Bushing TX NS 17 Guide Plate Paper NS 18 19 Exit Idler roller Assy with 19 1 19 4 1 059K39110 20 Bearing 4 013E25770 21 Exit Shaft Roller Assy 1 006K29340 22 Exit Gear 2 013E25780 23 Holder M Bushing Exit NS 24 Transport Exit Shaft Assy 1 006K29350 25 IPR Terminal TR Hawk NS 26 Cap M Wire PTL Lower NS 27 PBA Sub PTL2 NS 28 CBF Harness Thermistor NS 29 Terminal P PTL NS 30 Shield P Controller NS 9 10 Phaser 3425 Laser Printer Service Manual Service Parts List 9 3 Frame 1 Assembly Continued No Name Description Qty Part Number 31 Nut Hex NS 32 Cable Tie NS 33 Actuator Out Full NS 34 Photo Interrupter NS 35 Connector NS 36 Paper Size Sensor Assy with 36 1 36 3 1 110K14290 37 Harness Out Full NS Parts Lists 9 11 Frame 2 Assembly 3450 185 DIME Screw 9 12 Phaser 3425 Laser Printer Service Manual Service Parts List 9 4 Frame 2 Assembly No Name Description Qty Part Number 38 MEA Unit Terminal L NS 39 PMO Bearing S
22. Duplex Jam 2 4 13 Duplex Feed Jam Duplex Jam 1 4 12 Duplex Jam 1 0x0000080 or Jam 2 0x0000100 3 18 Duplex Paper Path 2 6 Duplex Printing Media Sizes 1 13 Duplex Roller Drive Assembly 8 45 Duplex Unit 2 13 E Electrical Specifications 1 12 Engine Power Up Sequence 4 4 Environmental Specifications 1 13 Error Messages and Codes Summary Table 3 13 Exit Drive 9 17 Exit Jam Jam 2 4 11 Service Manual Exit Motor Drive Assembly 8 22 Exit Roller Assembly 8 25 Exit Sensor 8 45 F Fault History 3 2 Frame 1 9 12 Frame 2 9 15 Front Inner Cover 8 12 Front Panel Assembly 8 15 Front Panel Continually Displays No Paper in Tray x 4 3 Front Panel Continually Displays Output Tray Full 4 4 Front Panel LED is on Front Panel Display is Blank 4 3 Front Panel Test Prints 5 3 Front Panel Troubleshooting 4 3 Functional Specifications 1 12 Fuser 9 21 9 22 Fuser Assembly 2 11 Fuser Control 2 5 Fuser Exit Sensor 2 13 Fuser Jam Jam 1 4 10 Fuser Removal 8 5 G General Notes on Disassembly 8 3 General Notes on Troubleshooting 3 6 H High Voltage Power Supply Board 8 42 HVPS Duplex Assembly 9 20 Index 1 Introduction 3 2 4 2 J Jam At Exit 3 17 Jam At Top 3 17 Jam At Tray 3 16 Jam History 3 2 L Laser Assembly 8 27 Laser Light Intensity Control 2 5 Laser Scanner Unit LSU 2 10 Left Cover Assembly 8 8 LSU Error or 0x0000008 3
23. Fuser horizontal direction m Transfer Roller Assembly as necessary m Incorrect high voltage Inspect the Transfer Roller spring outputs tension and bearing contacts egitan rn te m Laser Assembly m Replace Power Supply Board Digital Printer m Replace Laser Assembly Digital Printer Character Defects m Loose defective m Inspect cable connections verify Garbled print missing interface cables cable that cables meet specified repeating or scrambled not within requirements ee are problems aar m Replace optional DIMM memory i R relating to font data or meron m Replace Main Board character generation m Main Board Print Quality Troubleshooting 5 9 Image Defect Possible Cause Solution Unfused Image Partor m Paper quality damp m Paper is too thick damp or all of the image is paper contains a high percentage of unfused m Operating environment cotton m Remote Control Panel 5 Printer is not installed in specified settings environment m Fuser Assembly m Verify Remote Control Panel Main Board settings such as envelope m Inspect clean replace Fuser assembly as necessary m Replace Main Board Skewed Image The m Paper m Inspect paper for damage printed image is not m Paper tray Replace as necessary parallel with the sides of m Pick up roller m Check paper tray for damage the page assembly Paper Properly install fresh paper in the transportation paper tray m Fuser Assembly m Inspect Pick up r
24. Number 30 Harness Main Motor NS 31 Harness Motor NS 32 Reg Clutch 1 121E19270 33 PMO Cap TR NS 34 PBA Sub Cover Joint NS 35 Bracket P Shaft MP NS 36 Bearing Pick Up NS 37 Gear Pick Up Cam NS 38 E Ring NS 39 CBF Harness SMPS NS 40 CBF Harness MPF Joint NS 41 Network Interface N A 42 Fan DC Sub 1 127N07300 9 6 Phaser 3425 Laser Printer Service Manual Covers 3450 183 9 7 Parts Lists Service Parts List 9 2 Covers No Name Description Qty Part Number 1 Top Cover Assembly with 1 1 1 3 NS 1 1 Front Panel with 1 1 1 1 1 4 003N00979 1 2 Top Cvr Intlck Switch with 1 2 1 and 1 2 2 002N02471 1 3 Top Cover with 1 3 1 1 3 10 1 002N02470 2 Right Cover Assembly with 2 1 and 2 2 1 802K69580 3 Rear Cover Assembly with 3 1 3 8 1 802K69591 4 Left Cover 1 802E66540 5 Front Inner Cover 1 802E66550 6 Output Tray Cover 1 802E66560 9 8 Phaser 3425 Laser Printer Service Manual Frame 1 Assembly 3450 184 Parts Lists Service Parts List 9 3 Frame 1 Assembly No Name Description Qty Part Number 1 Frame M Base NS 2 Tray 1 Feed Assy with 2 1 2 3 1 059K39080 2 4 Tray 1 Feed Roller with 2 4 1 2 4 3 1 059K39090
25. OFF ON A4 OFF ON ON LETTER ON OFF OFF A5 for reference only supported in Tray 1 only OFF OFF OFF No Tray OFF OFF OFF 4 4 Phaser 3425 Laser Printer Service Manual Power Supply Troubleshooting Troubleshooting References Applicable Parts Wiring and Plug Jack Map References Power Supply Board AC Switch Harness Assembly Procedure Step Action and Questions Yes No 1 a Check the voltage at the AC wall outlet Is Go to Step 2 Notify the there approximately 110 VAC or 220 VAC if customer of the printer is a 220 V model at the AC wall improper AC outlet output from the outlet 2 a Check the power cord for defects or a loose Replace or Go to Step 3 connection reseat the power cord 3 a Disconnect the Power Cord and turn the AC Replace the Replace the AC switch ON Power Supply Switch Harness b Check the AC Switch Harness for continuity Board Assembly General Troubleshooting 4 5 Media Jams and the Paper Path Media based Problems 1 a db ON N O Check that the correct type of media is being used For the correct media types and weights see Media and Tray Specifications on page 1 14 The customer should be using a quality laser printer paper Inspect the paper for bent torn or folded corners Ensure that the correct media type is set in the front panel Ensure that the paper guides are set correctly Ensure that media is a supported type
26. Output Tray Facedown o N o Top Cover 10 Print Cartridge Phaser 3425 Laser Printer Service Manual Phaser 3425 Front Panel Configuration The front panel consists of a 2 x 16 display six functional buttons and an LED The buttons navigate the menu system perform functions and select modes of operation for the printer LED indicator m Green Ready to Print or m Flashing Green Receiving Processing Data Printing Printing or Power Saver Mode Front Panel Button Descriptions 5 6 s3450 161 1 LED On Line Status 5 OK select Button 2 Back Button 6 Down Arrow Button Scrolls down menu system 3 Cancel Button 7 Menu Button Cycles through top level menus 4 Up Arrow Button Scrolls up menu system General Information 1 5 Front Panel Shortcuts Mode Press this selection at Power On Enter Service Diagnostics OK hold the OK button down Phaser 3425 Laser Printer Rear View 3450 162 1 Power Switch 3 Power Receptacle 2 Rear Panel Interface Ports 4 Rear Jam Access Door Rear Panel Configuration Interfaces m IEEE 1284 Parallel m Ethernet 10BaseT and 100Tx m USB 1 6 Phaser 3425 Laser Printer Service Manual Main Board The following components need to be transferred from the old board when installing a new Main Board in the printer Note NVRAM parameters are not transferable to the replacement board These include Serial Number and Copy Count Serial number can be
27. Printer Service Manual 2 Charging 3 Exposure 4 Development 7 Fixing 8 Exit 1 Feeding A A R Registration Sensor Sensor 6 Transfer 5 Pre Transfer s3450 201 Print Modes The Phaser 3425 Laser Printer provides four print modes draft 300 600 and enhanced Print modes are front panel selectable m Draft mode Uses a combination of reduced toner output and the lowest resolution 300 x 300 dpi to extend print cartridge life 300 Used for printing with a resolution of 300 x 300 dpi 600 Used for printing with a resolution of 600 x 600 dpi Enhanced mode Used for printing on plain paper with an addressable resolution of 1200 x 1200 dpi Theory of Operation 2 3 Printer Controls Paper Size Control The paper size selection for Tray 2 and Tray 3 is set by moving the paper guide in the tray This in turn sets the plastic fingers on the side of the paper tray to a specific postion The position of the fingers activates the correct combination of the three paper size switches located in each paper tray slot for the selected paper size Additionally the back of the tray must be pulled down in order to select the two largest sizes US Folio and Legal Not all sizes can be used in both trays Refer to Media and Tray Specifications on page 1 14 for a complete listing of the media types for each tray Additional m
28. clean laser m Replace the Power Supply Board Black Prints The prints m No charge voltage m Verify the high voltage contacts are completely black Power Supply Board are operational and make good has no visible image m Print Cartridge contact with the print cartridge m Main board m Replace in the following order m Laser is always on m Print Cartridge m Power Supply Board m Main Board m Laser Assembly Print Quality Troubleshooting 5 7 Image Defect Possible Cause Solution Dark Image All areas of m Verify Remote Control m Verify Remote Control Panel the print are too dark Panel settings setting for the Toner Density m Print Cartridge menu is not set to dark m Incorrect high voltage Verify that the high voltage outputs Developer contacts are operational and _ Bias voltage make good contact with the print m Laser assembl cartridge y m Replace the following in order m Print Cartridge m Power Supply Board m Laser assembly Background Uniform m Media paper m Verify that paper meets printer toner contamination in m Operating specifications Print 20 to 30 non image area environment pages using recommended m Print Cartridge paper If using recycled paper try Transfer Roll non recycled paper Digital Printer meson ONE m Printer is installed in specified LE S m Incorrect High Voltage environment Digital Printer outputs m Replace Print Cartridge D
29. electrostatic charge from your body This can be accomplished by touching an earth ground source or by wearing a wrist strap device connected to an earth ground source Wearing a wrist strap will also prevent accumulation of additional bodily static charges Be sure to remove the wrist strap before applying power to the unit to avoid potential shock After removing a static sensitive assembly from its anti static bag place it on a grounded conductive surface If the anti static bag is conductive you may ground the bag and use it as a conductive surface Do not use freon propelled chemicals as they can generate electrical charges that may damage some devices Do not remove a static sensitive replacement component or electrical sub assembly from its protective package until you are ready to install it Before removing the protective material from the leads of a replacement device touch the protective material to the chassis or circuit assembly into which the device will be installed Minimize body motions when handling unpackaged replacement devices Simple motions such as your clothes brushing together or lifting a foot from a carpeted floor can generate enough static electricity to damage a static sensitive device Handle IC s and EPROM s carefully to avoid bending pins Pay attention to the direction of parts when mounting or inserting them on Printed Circuit Boards PCB s Phaser 3425 Laser Printer Service Safety Summary G
30. for the tray See Media and Tray Specifications on page 1 14 for correct media types sizes and weights Load a fresh ream of paper in the tray Prior to performing any of the Jam procedures verify that the Registration and Fuser Exit actuators are not being held in the actuated position and that they move freely without binding Paper Mis feed from Tray 1 MPT Troubleshooting References Applicable Parts Wiring and Plug Jack Map References Tray 1 Actuator Tray 1 Assembly Procedure Step Action and Questions Yes No 1 a ls paper loaded correctly Go to Step 2 Load paper correctly 2 a Is tray damaged Replace Tray 1 Go to Step 3 b Are parts missing Assembly 3 a Is Tray 1 actuator binding Repair or Go to Step 4 replace Tray 1 Actuator 4 a Is Tray 1 Solenoid operational Refer to Go to Step 5 Replace Tray 1 Service Diagnostics Menu Map on Solenoid page 3 9 5 a Are the feed roller or retard drag pads Clean if dirty Replace damaged or dirty damaged parts 4 6 Phaser 3425 Laser Printer Service Manual Paper Mis feed from Tray 2 Troubleshooting References Applicable Parts Wiring and Plug Jack Map References Main Board Tray 2 Pick Up Roller Tray 2 Assembly Procedure Step Action and Questions Yes No 1 a Is paper loaded correctly Go to Step 2 Load paper correctly 2 a Is the tray damaged Replace Tray2 G
31. is only effective during test and does not change operationg temp Bracketed letter following the target temp indicates Fuser state O is on X is off OPC Print Read OPC Displays the currently stored value Total OPC Cartridge Cycle for the number of cycles by the Print Cycle Cycle Cartridge Ranges are as follows XXX 10K Cartridge m 78 000 Toner Low m 92 000 Replace Cart 5K Cartridge m 39 000 Toner Low m 46 000 Replace Cart 3 12 Phaser 3425 Laser Printer Service Manual Error Messages and Codes Summary Table Error Messages and Codes Summary Table Error Type Front Panel Message Code Fuser Fuser Failure open disconnected Fuser 0x56 Engine Fuser Low Heat Error 0x57 Engine Fuser Over Heat Error 0x58 Laser Errors Laser Failure Polygon motor not ready 0x5A Jam Errors Jam At Tray 1 2 3 Remove All Paper 0x01 Jam At Top Open Top Cover 0x02 Jam At Exit Open Top Cover 0x03 Jam At Duplex Open Top Cover 0x04 Jam At Tray Remove Tray 2 0x05 Memory Errors Insufficient Memory 0x41 Tray Errors Output Tray is Full 0x44 Toner Errors Replace Print Cartridge 0x53 Invalid Print Cartridge 0x55 Error Messages and Codes 3 13 Fuser Failure Low Heat or Overheat 0x56 0x57 0x58 The printer s front panel displays Fuser Failure Engine Fuser Over Heat Error or Engine Fuser Low Heat Error The fuser has been removed reseated a
32. or e oo nr JOYSIWU9Y L ON or pigog Uren B AGv3471 H T WINST L NIT L pigog ows J08UaS joouuosiauy NO Pre wre ting ndino eBpl11189 Ud Phaser 3425 Laser Printer Service Manual 10 2 Map 1 Main Board CN 12 CN 16 M RAM DIMM ROM DIMM eee Fa CN7 not used 53450195 Map 2 Connector Board ei Registration Clutch Tray 1 Solenoid CN 14 CN 11 Tray 2 Solenoid z r Tray 1 Empty CN 10 Sensor Tray 2 Out CN 13 Switch SW1 Main Board CN 12 s3450 180 10 4 Phaser 3425 Laser Printer Service Manual Connection Diagram 181 0G Es Ha 0 9 HOLIINNOO A AldNa3 dN ano s NTO HOLOW 6 ANO gt ang s into au gt L HOINTO dN TC INANI OV 10999 HOLOW 8 andje aW Odd 2 Ind anje Fag dois 1avisu 2 save a neela imo NYA S 771 HOLNTO NIVIN DOA 9 Sel EL ALANI dN S SAve L FE HOLNT0 193YH ve JAY HOLON NI
33. outward and remove it from the printer 8 8 Phaser 3425 Laser Printer Service Manual Top Cover Assembly PL 9 2 1 1 Remove the Print Cartridge page 8 4 and protect it from light 2 Remove the Right Cover Assembly page 8 7 and the Left Cover Assembly page 8 8 from the printer 3 Open Tray 1 the rear cover and the front section of the Top Cover Note If the NIC Card is installed remove it page 8 17 to access the connectors on the Main Board 4 Disconnect CN 4 Front Panel from the Main Board and CN 2 Cover Open from the Cover Interconnect Board 5 Remove 3 screws 2 at the top front and 1 on the rear edge that secure the Top Cover to the printer assembly L 53450 034 Service Parts Disassembly 8 9 6 Unlatch the retaining hooks on both sides of the Top Cover and the one at the left rear corner The hook at the left rear corner requires the use of a small screwdriver to release Remove the Top Cover Assembly from the printer Caution Remove the cover carefully while feeding the cables and connectors removed from the Main Board through the chassis access holes 3450 035 Tray 1 Cover Assembly PL 9 1 2 1 Power down the printer and remove the power cord from the wall outlet 2 Open Tray 1 Caution Use caution when pushing outward on the top of the slot tracks in the next Step If you exert too much pressure you can break the track 8 10 Phaser 3425 Laser Printer Service
34. rollers and gears Warning Do not try to manually rotate or manually stop the drive assemblies while any printer motor is running Servicing Fuser Components Warning This printer uses heat to fuse the toner image to media The Fuser Assembly is VERY HOT Turn the printer power off and wait at least 5 minutes for the Fuser to cool before you attempt to service the Fuser Assembly or adjacent components viii Phaser 3425 Laser Printer Regulatory Specifications Federal Communications Compliance The equipment described in this manual generates and uses radio frequency energy If it is not installed properly in strict accordance with Xerox instructions it may cause interference with radio and television reception or may not function properly due to interference from another device However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiver device being interfered with Increase the separation between the printer and the receiver Connect the printer into an outlet on a different circuit than the receiver Route the interface cables on the printer away from the receiver Consult the dealer Xerox service or an experienced
35. the name of the part to be ordered and the number of parts supplied per order 5 Parts identified throughout this manual are referenced PL For example PL 3 1 10 means the part is item 10 of Parts List 3 1 6 A black triangle preceding a number followed by a parenthetical statement in an illustrated parts list means the item is a parent assembly made up of the individual parts called out in parentheses 7 The notation with X Y following a part name indicates an assembly that is made up of components X through Y For example 1 with 2 4 means part 1 consists of part 2 part 3 and part 4 8 An asterisk following a part name indicates the page contains a note about this part 9 The notation NS next to a part indicates that pariticular part is not spared but contained in a kit or major assembly 10 The notation J1 lt gt J2 and P2 is attached to a wire harness It indicates that connector Jack is attached to one end of the wire harness and connector J2 is attached to the other end that is plugged into P2 Note Only parts showing part numbers are available for support Parts not showing part numbers are available on the parent assembly Legend Identifier Meaning C C ring E E ring KL K clip S Screw Parts Lists 9 3 Print Engine Parts Main Unit s3450 182 24 2 9 4 Phaser 3425 Laser Printer Service Manual
36. the xerographic process m Optional Paper Tray 3 and Tray 1 The HVPS section generates and supplies the following voltages m Transfer Voltage m Charge Voltage m Bias Voltage m Supply Voltage The Bias Supply and Charge voltages are used by the Print Cartridge Theory of Operation 2 9 Print Cartridge The Print Cartridge receives image data in the form of pulsed laser light from the Laser Scan Unit and creates the image via the xerographic process The Print Cartridge contains the following components Charge Roller Drum Developer Roller D R Supply Roller S R Metering Blade Cleaning Blade Laser Scan Unit LSU The Laser Scan Unit receives the bit mapped image data from the Main Board and uses that information to turn the laser beam on and off as required to correctly expose the drum Image data transfer from the Main Board is controlled by a synchronization signal from the LSU so the vertical scanning line is synchronized with the printed page The LSU contains the following components 2 10 Laser Diode generates the laser beam Rotating Polygon Mirror scans the laser beam across the drum axially Beam Detector synchronizes the left margin Optical Lens System focuses the laser beam onto the surface of the drum Mirrors reflect the laser beam onto the surface of the drum Phaser 3425 Laser Printer Service Manual Transfer Roller The transfer subsystem consists of the Pre Transfer Lamp PTL and the Transfer
37. transfer area at the same time as the leading edge of the developed image on the drum Paper Transport The registration transport assembly continues to drive the paper into the transfer area where the image is transferred from the drum to the paper The paper continues to the fusing area where it goes between the fuser rollers The heat roller is heated by a halogen lamp When the paper goes between the heat roller and the pressure roller the toner is melted into the paper forming a permanent image The temperature of the heat roller is monitored by a thermistor that sends signals to the Main Board The fuser drives the paper into the exit rollers and the exit rollers drive the paper into the output tray When printing the first side of a duplex print job the drive direction is reversed when the exit sensor is actuated Paper is then directed into the Duplex Unit for printing on the second side 2 12 Phaser 3425 Laser Printer Service Manual Fuser Exit Sensor The Exit Sensor monitors the paper movement If the paper takes too long getting to the sensor or it stays on the sensor too long the Main Board will shut down the machine the Control Panel LED will blink red and a JAM 2 error message will display on the Control Panel The signal from the Exit Sensor is also used to control paper feed to the Duplex Unit for duplex print jobs Duplex Unit The Duplex Unit is mounted in the bottom of the printer As paper leaves the fuser and
38. 4 COVBES Re tiie NA tsk ie eat cohen Done io 9 7 Frame 1 Assembly 9 9 Frame 2 Assembly 9 12 Fuser Assembly ices acne X XR g Reg ds DUDE ha R N 9 15 Main Drive Motor Assembly 9 16 Exit Drive Motor Assembly 9 17 Registration Transport ASSy 9 18 Power Supply Duplex Assembly 9 20 Paper hay 2 nus Gate cade Wea cede ia 9 21 Optional Lower Feeder Assembly 9 22 Xerox Supplies 9 25 10 Wiring Diagrams Print Engine Interconnect Diagram 10 2 Map 1 Main Board 10 3 Map 2 Connector Board 10 4 Connection Diagram 10 5 Index Contents xvii xviii Phaser 3425 Laser Printer General Information In this chapter Printer Introduction and Overview Printer Configurations Parts of the Printer Phaser 3425 Front Panel Configuration Main Board Service Parts Consumables Printer Specifications Chapter Printer Introduction and Overview The Xerox Phaser _ 3425 Laser Printer Service Manual is the primary document used for repairing maintaining and troubleshooting the printer To ensure complete understanding of this product participati
39. 9 15 Main Drive Motor Assembly Harness Main Motor 3450 187 Service Parts List 9 6 Main Drive kad 2e 5 3 Z N pa N G S o A gt Dic c la 2 2 ea B 15 o A d A E fc o oO Z o o z Phaser 3425 Laser Printer Service Manual 9 16 Exit Drive Motor Assembly 3450 188 Service Parts List 9 7 Exit Drive No Name Description Qty Part Number 0 Exit Motor Assy 1 127K44870 Parts Lists 9 17 Registration Transport Assy 1 13 7 s3450 189 Service Parts List 9 8 Registration Transport Assy No Name Description Qty Part Number 0 Reg Transport Assy 1 022N02195 1 Guide P Regi Lower NS 2 Roller regi Lower L NS 3 Shaft Regi Upper NS 4 Roller M Regi Idle S NS 5 Roller M Regi Idle L NS 9 18 Phaser 3425 Laser Printer Service Manual Service Parts List 9 8 Registration Transport Assy Continued No Name Description Qty Part Number 6 Spring TS NS 7 Paper Guide NS 8 Guide P Regi Plate NS 9 Holder M Sensor NS 10 Photo Interrupter 1 110K14300 11 Bush M Roller Regi L NS 12 E Ring NS 13 Bush M Roller Regi L NS 14 Spring ES NS 15 CBF Harness MP Empty NS 16 Washer Plain NS 17 Cap M Wire PTL Upper NS 18 Cap M Bushing Actuator NS 19 Cap P Bushing Regi Lower NS 20 PBA Main PTL1 NS
40. Board 5 8 Phaser 3425 Laser Printer Service Manual Image Defect Possible Cause Solution Black Spots Marks m Print Cartridge m Replace the Print Cartridge There are spots and or m Fuser assembly NOTE Refer to Defects marks of toner on the m Paper transports Associated with Specific Printer printed side of the page m Transfer Roller Components on page 5 2 for o defect pitch tal azat m Inspect clean replace Fuser DigitaPPriritip assembly as necessary Digital Printer m Clean contamination from paper DiaitakPriritei transports and exit rollers igita er m Clean replace Transfer Roller DigitakPrinter DigitaPriniter Spot or Vertical m Damp paper m Replace paper Deletions Solid areas m Foreign matter m Check printer components for are marked with irregular contamination of surface contamination or paper white spots printer components scraps Clean as required m Print Cartridge m If deletions repeat every 95 mm m Transfer Roller replace Print Cartridge jaita Pri L igital dig NOTE Refer to Defects Digital Printer oo with Specific Printer iiaital Pri omponents on page 5 2 for igital F rinter defect pitch Digital Printer m Remove the Transfer Roller and Digital Printer clean dust off If deletions repeat every 57 mm replace Transfer Roller Horizontal Bands Dark m Print Cartridge m Replace the Print Cartridge bands appearing in the m Fuser Assembly m Inspect clean replace
41. Manual 3 Close the Tray 1 cover about half way then push outward on the top of the left slot track that the link pin rides in and disconnect the Tray Link from the left cover slot Next flex the top of the right track and release right Tray Link 1 Tray Link 2 Link Pin 3 Slot Track 4 Raise the cover slightly so the boss located behind the hinge on the left side of the cover clears the hinge pin mount and slide the cover to the right and pull out to remove it from the printer s3450 006 1 Tray 1 Cover 2 Hinge Service Parts Disassembly 8 11 Retard Assembly PL 9 3 7 1 Remove the Tray 1 Cover Assembly page 8 10 Note Removing Tray 2 is not required however it will provide increased access 2 Unplug the connector on the Tray 1 Empty Sensor This comes from CN 13 on the Connector Board 3 Remove 2 screws securing the Retard Assembly to the printer chassis 3450 009 Caution There is a spring mounted under the pressure arm of the Retard Assembly Be careful not to lose the spring When reinstalling the Retard Assembly ensure that the spring is securely mounted and seats correctly over the boss on the chassis When properly installed the Retard pressure arm should move smoothly up and down against the spring pressure 4 Pull outward to remove the Retard Feeder Assembly with the Tray 1 Empty Sensor and Actuator from the printer Front Inner Cover PL 9 2 5 Note
42. Panel wiring harness Replace the Front Panel Replace the Main Board Front Panel Continually Displays Close Cover or Check Cartridge 1 4 Verify that the Top Cover is securely closed 2 3 Ensure that the Print Cartridge is properly installed and securely seated Verify that the Top Cover Print Cartridge and Fuser Gate interlocks are functional Replace the Main Board Front Panel Continually Displays No Paper in Tray x Ensure that the specified tray contains paper Verify that the Paper Out actuator is in the correct position and moves without binding Replace the Paper Out Sensor 4 Replace the Main Board General Troubleshooting 4 3 Front Panel Continually Displays Output Tray Is Full ok Empty the output tray N Ensure that the Output Full Actuator is in the correct position and moves without binding Verify that all harness connections to the Output Full Sensor are secure Replace the Output Full Sensor Replace the Output Full Sensor Harness Replace the Exit Roller Assembly NO oo BB WO Replace the Main Board Paper Size Switch Assembly Paper size and tray installation is determined by a combination of ON OFF statuses of the upper middle and lower switches of the Switch Paper Size Assembly Paper size Switches Upper Middle Lower LEGAL14 ON ON OFF LEGAL13 ON OFF ON EXECUTIVE OFF ON ON B5 OFF
43. Step 5 tray for damage or improper seating part Are guides damaged or loose 5 Check the surface of the pick up rollers for Clean rollers with Replace Main dirt or damage Are the rollers dirty or a soft cloth very Board damaged slightly dampened with water or replace if damaged 3 16 Phaser 3425 Laser Printer Service Manual Jam At Top 0x02 or Jam At Exit 0x03 The printer s front panel displays Jam At Top or Jam At Exit Any obstructions media or debris has been removed from the paper path Printer power has been cycled and the error still appears Troubleshooting Reference Applicable Parts Wiring and Plug Jack Map References Fuser Print Engine Interconnect Diagram on page 10 2 Power Supply Board Main Board Troubleshooting Procedure Steps Actions and Questions Yes No 1 Does paper jam in front of or just inside the Replace the Go to Step 2 Fuser Power Supply Board 2 If paper jams in the fuser and the fuser Replace the Main Replace the discharge roller after leaving the Regi Board damaged sensor Sensor use the embedded diagnostics to check operation of the Regi Sensor Does the sensor operate correctly 3 Does the error recur Go to Step 4 Complete 4 If paper exits the printer but Jam At Exit Replace the Replace the occurs use the embedded diagnostics to Power Supply Fuser check operation of the Fuser Exit Sensor Board Does the sensor ope
44. The system comprising a drum and developing unit places the toner image onto print media producing a monochrome image The following procedures are summarized The printing process is composed of the following steps See the illustration on the following page as a reference 1 2 2 Charging The charge roller is negatively charged at approximately 1400 VDC by the high voltage power supply HVPS The charge roller is kept in contact with the drum surface to provide a uniform negative charge of approximately 800 VDC on the drum surface as it rotates at a constant speed Exposure The laser unit emits laser beams in response to image data from the Main board The laser beams are directed onto the drum surface through a system of mirrors and lenses A rotating polygonal mirror causes the laser beams to scan the drum surface from end to end axially as it rotates The beams are turned on to print a pixel and off when no printing is required The negative charge on the drum surface is reduced to approximately 250 VDC at each point where the energized laser beam strikes to form an invisible electrostatic latent image on the drum surface Development Negatively charged toner particles from the toner hopper are applied to the supply roller and are then applied to the developer roller in a even layer controlled by the metering blade The developer roller turns against the drum and the toner particles are attracted to the relatively po
45. Y lt em gt mal TU UNS NID 4051 v Aad 8 z 8d NIZ baal C ANO awo 40S maala a vdlz Ave SIS 1091 z ont s b Wd L Aad 30S nel ONG YOLOW X3 lt 798 IG lt r d8 on 6 SAS 2 HISNI Y AND 91 GND 8 ano s ON 2 swelr XIANG d Ez WMd AHL St ano z aHvog save uxa a az nel nel 9 Alddns z5 MZ Z auvoa NIYIN ON 12 N3 AHL el WMd AHN S 43MOd dv 2901414 INItd INIOP Ave L ODA 02 NE E ZL ane U SS 43409 lt gt 001 6t avaama ii Wad Aza e oci NE ang er ano ot nel a Baal al de save zt ayawan 6 on 4 Sane SSE lt a HOSN3S 1IX3 0 9 dre N3dO 44109 par alo HOSN3S 1934 ONASH GE Age eazs aji Aldwa as IA Jt anole ao SAS Ave S AldW3 d E 15834 13Wa 5 anol or anol E NEEE dE avnois z awat de a 1328 a 6 viva iuvole PECE DINI RTE d9 vU OLNEY E zwuaHi 8 no 1uvole anoji CESR 2 l oaa 8 aavan TEAN anal TF gt 4 HOSN3S nel on manen L ERI y del Tn T 2W43H1 z gS LT G e TANVd NVA H3SV1 39GIYLYYO LNIHd EC YOLSIWYSHL 10 5 10 6 Phaser 3425 Laser Printer Service Manual Index A Adjustments 6 2 C Calibrations 6 2 Cleaning 7 2 Connection Diagram 10 5 Connector Locator Maps 10 2 Consumables 1 9 Control Panel Assembly 8 15 Cover Open Interlock Switch 8 16 Covers 9 7 CRUM Toner Error 4 14 D DC Fan Assembly 8 23 Defects Associated with Specific Printer Components 5 2 Duplex Assembly 8 45 Duplex Exit Jam
46. and let the printer proceed through POST to a Ready condition When instructed to take voltage continuity or resistance readings on wiring harness proceed as follows Check P J 232 1 to P J 210 5 by placing the red probe of your meter on pin 1 of P J 232 and place the black probe of your meter on pin 5 of P J 210 When you are instructed to take resistance readings between P J 232 lt gt P J 210 without specified pin numbers check all pins Refer to Wiring Diagrams on page 10 1 for the location of all wiring harnesses and pins When you are instructed to take a voltage reading the black probe is generally connected to a pin that is either RTN Return or SG Signal Ground You can substitute any RTN pin or test point in the printer and you can use FG frame ground in place of any SG pin or test point Before measuring voltages make sure the printer is switched ON the Imaging Unit and the paper trays are in place and the interlock switches are actuated unless a troubleshooting procedure instructs otherwise All voltage values given in the troubleshooting procedures are approximate values The main purpose of voltage readings is to determine whether or not a component is receiving the correct voltage value from the power supply and if gating a voltage drop occurs during component actuation Gating signals may be nothing more than a pulse resulting in a momentary drop in voltage tha
47. and the print quality parameters From the printers front panel menus select Troubleshooting gt Service Tools gt Test Prints Use supported paper from a fresh unopened ream whenever possible to check the image quality of prints Make five copies of the test print Discard the first two prints and retain the remaining prints for image quality analysis Print Quality Troubleshooting 5 3 Test Print Phaser3450 01 1028 2 5 8 5x11 SEF We conduct many of ever these mail s coverage Would yo your time to read survey has been de time and effort T test pattern a qu envelope are enclo PROCESS LL SCAN We conduct many of ever these mail s coverage Would yo your time to read survey has been de time and effort T test pattern a qu envelope are enclo IZA 3 3450 200 Deletions Inspect the test print for the presence of deletions or unprinted spots If these are found go to Spot or Vertical Deletions on page 5 9 5 4 Phaser 3425 Laser Printer Service Manual Fusing Rub the image three times at the indicated points with a soft cloth or tissue The toner should not lift off of the surface of the print If the image smears or toner lifts off the image onto the cloth refer to Unfused Image on page 5 10 WA ON IZ Resolution Observe the three resolution check points on several test prints m Ensure that the 2 pixel horizontal vertical and diagonal lin
48. assembly 6 19 5 Remove the e ring that secures the Registration Clutch to the Feed Roller Shaft and remove the Registration Clutch 3450 019 6 Remove the screw securing the Cover Interconnect Board to the Main Drive and move it out of the way 7 Remove 6 screws that secure the Main Drive to the printer chassis and remove the Main Drive Y 3450 020 8 20 Phaser 3425 Laser Printer Service Manual Replacement Notes Note A ground wire and a discharge capacitor are secured to the Main Drive Assembly by 2 of the mounting screws Note the position for reassembly Note Seat the right side of the Main Drive first then work the left side into position while aligning the gears Reattach the Cover Interconnect Board after the Main Drive is positioned Tray 2 Solenoid PL 9 1 28 1 Remove the Main Drive Assembly page 8 19 2 Disconnect CN 10 between the Tray 2 Solenoid and the Connector Board 3 Remove 2 screws that secure the Tray 2 Solenoid to the chassis and remove the Tray 2 Solenoid 53450 026 Tray 2 No Paper Sensor PL 9 3 44 Remove the left cover from the printer page 8 8 Disconnect CN 2 to Registration Sensor from the sensor board Disconnect CN 3 to Print Cartridge Interconnect Board from the sensor board A O N Remove 2 screws securing the Tray 2 No Paper Sensor to the printer chassis and remove the sensor Service Parts Disassembly 8 21 Pape
49. at if not strictly observed could result in injury or loss of life Product Terms Caution A personal injury hazard exists that may not be apparent For example a panel may cover the hazardous area Danger A personal injury hazard exists in the area where you see the sign Service Manual lil Symbols Marked on the Product d A A Q Ci DANGER high voltage Protective ground earth symbol Hot surface on or in the printer Use caution to avoid personal injury The surface is hot while the printer is running After turning off the power wait 30 minutes Avoid pinching fingers in the printer Use caution to avoid personal injury Use caution or draws attention to a particular component Refer to the manual s for information iv Phaser 3425 Laser Printer Power Safety Precautions Power Source For 110 VAC printers do not apply more than 140 volts RMS between the supply conductors or between either supply conductor and ground Use only the specified power cord and connector For 220 VAC printers do not apply more than 264 volts RMS between the supply conductors or between either supply conductor and ground Use only the specified power cord This manual assumes that the reader is a qualified service technician Plug the three wire power cord with grounding prong into a grounded AC outlet only If necessary contact a licensed electrician to install a properly grounded outlet If the product loses
50. by Theory of Operation 2 5 Paper Path of the Printer Papers that meet the specifications may be fed from Trays 1 and 2 or the optional Tray 3 If you use thick paper from the RCP Menu with a weight of more than 105 g m 60 Ib you must insert the paper into Tray 1 and select the paper type Paper will exit the printer to the face down top tray A door at the rear of the printer provides access for jam clearance The diagram below shows the paper path through the Phaser 3425 Laser Printer and identifies the major components The simplex paper path is shown in black and the duplex path is shown in grey R2 3450 196 R1 Print Cartridge Drum R7 Feed Roller S1 Paper Empty Sensor Tray 2 R2 Transfer Roller R8 Pick Up Roller S2 Paper Empty Sensor Tray 1 R3 Registration Roller R9 Heat Roller S3 Registration Sensor R4 Idle Roller R10 Pressure Roller S4 Exit Sensor R5 Tray 1 Pick Up Roller R11 Duplex Roller S5 Duplex Sensor R6 Retard Roller R12 Duplex ldle Roller Duplex Paper Path When duplex print mode is selected the paper is first printed on side one When the image on side one of the paper is fused as detected by the Fuser Exit Sensor the drive motor reverses The paper is fed through the duplexer and back up to the feed roller with side two positioned for printing 2 6 Phaser 3425 Laser Printer Service Manual Major Assemblies and Functions The Phaser 3425 Laser Printer contains several subsystems Ea
51. ch subsystem contains Service Parts identified in the parts list in Chapter 9 of this manual For information on repairing or replacing sub assemblies and Service Parts refer to the Removal and Replacement Procedures in Chapter 8 of this manual Some components may not be replaceable except as part of a larger component Metering Blade 500V 650V GND Develop Block Host Computer System Controller HI l H Print Engine Controller ih E HSYNC Face Down F Developer A Exit Sensor Registration Sensor 3450 165 Main Board The Main Board combines the Image Processor and Engine Control functions It contains a 266 MHz Power PC processor and comes with a standard memory capacity of 32 Mbytes The board provides one expansion slot that allows available memory to be expanded up to 160 Mbytes by adding an additional 32 Mbyte 64 Mbyte or 128 Mbyte DIMM Theory of Operation 2 7 Image Processor Function The host computer connects to the Main Board using a bi directional parallel or Universal Serial Bus USB cable or via an optional RJ45 Ethernet Network Card The Main Board receives image data from the host computer and converts the image to a bitmap image It then sends the current image to the Laser Scanner assembly 100PIN DIMM 16Mbit Flash Memory DATA 16 31 Mask Font ROM Regulator
52. ed Paper Type Size Media Sizes Letter 215 9 x 279 4 mm 8 5 x 11 in All Trays Legal 215 9 x 355 6 mm 8 5 x 14 in All Trays US Folio 215 9 x 330 2 mm 8 5 x 13 in All Trays A4 210 x 297 mm 8 27 x 11 69 in All Trays Custom Size Min Width 210 mm 8 27 in Tray 1 Only Max Width 215 9 mm 8 5 in Min Length 127 mm 5 in Max Length 355 6 mm 14 in General Information 1 13 Media and Tray Specifications Specification Trays Printable Minimum margins 4 mm 0 16 in on all sides All Trays Area Maximum paper size 215 9 mm x 355 6 mm 8 5 in x 14 in Minimum paper size 75 mm x 125 mm 3 in x 5 in Tray 1 only Supported Paper Type Size Media Sizes Letter 215 9 x 279 4 mm 8 5 x 11 in All Trays Legal 215 9 x 355 6 mm 8 5 x 14 in All Trays Executive 184 2 x 266 7 mm 7 25 x 10 5 in All Trays Statement 139 7 x 215 9 mm 5 5 x 8 5 in Tray 1 Only US Folio 215 9 x 330 2 mm 8 5 x 13 in All Trays A4 210 x 297 mm 8 27 x 11 69 in All Trays A5 148 x 210 mm 5 83 x 8 27 in All Trays US Postcard 88 9 x 139 7 mm 3 5 x 5 5 in Tray 1 Only A6 105 x 148 mm 4 13 x 5 85 in Tray 1 Only B5 JIS 182 x 257 mm 7 16 x 10 12 in All Trays B5 ISO 176 x 250 mm 6 93 x 9 84 in All Trays Custom Size Tray 1 Only Supported Type Weight Media Types Plain Paper 64 90 g m 17 24 Ib Bond All Trays and Weights Heavy Plain Paper 85 105 g m 22 28 Ib Bond AI Trays Transparency All Tray
53. edia types can be used in Tray 1 MPT After inserting the media in Tray 1 use the front panel controls to select the media type Paper Size Switches are identified as SW1 SW2 and SW3 Paper Size Switch Paper Size sw1 Sw2 SW3 LEGAL14 ON ON ON US FOLIO LEGAL 13 ON ON OFF EXECUTIVE ON OFF ON B5 ON OFF OFF A4 OFF ON ON LETTER OFF OFF ON A5 OFF ON ON No Tray OFF OFF OFF Selective Control Paper Pick When not otherwise controlled by operator selection from the control panel the default paper pick selected at power ON is Tray 2 The tray in the optional Feeder is Tray 3 If the default tray is empty the printer will automatically switch to any other tray that contains paper unless Tray Chaining is set to OFF 2 4 Phaser 3425 Laser Printer Service Manual Laser Light Intensity Control Image data is transmitted to the laser diode in the Laser Unit as digital signals The laser diode converts the image data from digital signals to optical signals data expressed by blinking laser beams The laser unit monitors the output to determine if variations in the light intensity from the laser beam variations in the optical system such as mirrors and lenses or variations in drum sensitivity are preventing the system from obtaining a proper electrostatic image and if necessary adjusts the light intensity to attain a stable electrostatic image Process Control For stable printing the parame
54. edure The steps are to be followed sequentially until the problem is fixed or resolved The Actions and Questions box contains additional information and or additional procedures you must follow to isolate the problem When a procedure instructs you to test a component using service diagnostics see the Service Diagnostics Menu Map on page 3 9 for the detailed steps and functions for testing parts of the printer The action is followed by a question If your response to the question is Yes then follow the instructions for a Yes reply If your response to the question is No then follow the instructions for a No reply Troubleshooting Procedures may ask you to take voltage readings or test for continuity at certain test points within the printer For detailed diagrams refer to Chapter 10 Wiring Diagrams on page 10 1 for complete information on test point locations and signal names Troubleshooting Procedures often ask you to replace a printer component Chapter 8 Service Parts Disassembly on page 8 1 provides detailed steps for removing and replacing all major parts of the printer Chapter 9 Parts Lists on page 9 1 details the location quantity and part number for all spared printer parts Error Messages and Codes 3 5 General Notes on Troubleshooting 1 3 6 Unless indicated otherwise the instruction Switch ON printer main power means for you to switch ON printer power
55. efects Associated with Specific Printer Components Some print quality problems can be associated with specific assemblies the most common problems and the associated assemblies are listed below Also refer to the specific print quality troubleshooting procedure for more information Print Cartridge Streaks Fine Lines Banding in Process Direction Uneven Density Voids Repeating Defects Transfer Roller Toner on the back side of the printed page simplex mode Light Prints Repeating Defects Spots on Image 5 2 Phaser 3425 Laser Printer Service Manual Fuser m Hot or Cold Offsetting m Repeating Defects m Voids Repeating Defects Distance Assembly Component between Defects Typical Defect Print Cartridge Developer Roller 49 mm 1 93 in Horizontal image band Drum 95 mm 3 74 in White spots on black image or black spots on white Drum Charge Rollers 38 mm 1 50 in Black spots Supply Roller 45 mm 1 77 in Light or dark horizontal image bands Transfer Roller Transfer Roller 57 mm 2 24 in Image ghost Fuser Assembly Heat Roller 82 mm 3 23 in Black spots and image ghost Pressure Roller 92 mm 3 62 in Black spots on back Front Panel Test Print A test print is available to aid in determining the quality of output from the printer and to assist in troubleshooting problems Each area of the test print is used for a print quality parameter The following pages explain each of the areas
56. elines for energy efficiency The Energy Star name and logo are registered U S marks L a Service Terms Manual Terms Various terms are used throughout this manual to either provide additional information on a specific topic or to warn of possible danger present during a procedure or action Be aware of all symbols and terms when they are used and always read NOTE CAUTION and WARNING statements Common Acronyms The following list defines the acronyms that may be found in this manual ADC Automatic Density Control NCS Non Contact Sensor BTR Bias Transfer Roller PHD Imaging Unit CRUM Customer Replaceable Unit Monitor PL FRU Parts List CTD Toner Density Control PTL Pre Transfer Lamp DRV Motor Driver Board RMI Routine Maintenance Item ESD Electrostatic Discharge RMS Root Mean Square LSU Laser Scanning Unit RTC Charge Roller MCU Engine Control Board Note A note indicates an operating or maintenance procedure practice or condition that is neccessary to efficiently accomplish a task A note can provide additional information related to a specific subject or add a comment on the results achieved through a previous action Caution A caution statement indicates an operating or maintenance procedure practice or condition that if not strictly observed could result in damage to or destruction of equipment Warning A warning statement indicates an operating or maintenance procedure practice or condition th
57. eneral Guidelines Note The material presented here is intended as a safety reminder for qualified service personnel Refer also to the preceding Power Safety Precautions Avoid servicing alone Do not perform internal service or adjustment of this product unless another person capable of rendering first aid or resuscitation is present Use care when servicing with power Dangerous voltages may exist at several points in this product To avoid personal injury do not touch exposed connections and components while power is on Disconnect power before removing the power supply shield or replacing components Do not wear jewelry Remove jewelry prior to servicing Rings necklaces and other metallic objects could come into contact with dangerous voltages and currents Power source This product is intended to operate from a power source that will not apply more then 264 volts rms for a 220 volt AC outlet or 140 volts rms for a 110 volt AC outlet between the supply conductors or between either supply conductor and ground A protective ground connection by way of the grounding conductor in the power cord is essential for safe operation Warning Labels Read and obey all posted warning labels Warning labels are displayed on potentially dangerous printer components As you service the printer check to make certain that all warning labels remain in place Safety Interlocks Make sure all covers and the printer s front panel are in place and al
58. ensor 1 Regi Sensor 2 Sensor Holder Tray 1 Feed Roller Assembly PL 9 3 2 1 Remove the Front Inner Cover Assembly page 8 12 Service Parts Disassembly 8 31 2 Disconnect CN 11 connecting the Tray 1 Solenoid to the Connector Board see Map 2 Connector Board on page 10 4 3450 024 3 Remove 2 screws securing the Tray 1 Solenoid item 1 to the chassis and remove the solenoid Note The ground wire will also be removed at this time Be sure to replace it when replacing the solenoid 3450 025 Phaser 3425 Laser Printer Service Manual 8 32 4 Remove 2 screws one at each end of the Tray 1 Pick Up Rack and unsnap the rack with the 2 bushings that secure the rack to the Tray 1 Feed Roller Shaft 3450 068 1 Bushing 2 Tray 1 Pick Up Rack 5 Remove 1 screw on the right side of the printer that secures the bracket over the right end of the Feed Roller Shaft Remove the bracket and the Tray Gear 83450 069 1 Bracket 2 Tray 1 Gear Service Parts Disassembly 8 33 6 Pull out on the top of the bearing retainer on both sides of the printer to free the tab from the retaining hole in the chassis then rotate the bearings to the rear to remove them from the shaft 3450 070 7 Slide the shaft towards the right side far enough to free the left end of the shaft as shown by below 8 Pull the left end of the shaft forward while sliding the right end of the shaft free a
59. er Roller Box N A Power Cords Description Part Number Cable Assy 3 18AWG 115 V 98 OL 161 0066 00 Cable PWR EURO 220 V 99 L 161 0066 09 Cable PWR U K 240 V 96 L 161 0066 10 Cable PWR AUST 240 V 96 L 161 0066 11 Cable Assy SWISS 220 240 V 50 Hz 161 0154 00 Cable Assy PWR DANISH 250 V 161 0240 00 Cable Assy PWR PRC 161 0304 00 Power 240 V ARGENTINA 161 0307 00 Parts Lists 9 25 Upgrade Kits and Options Description Part Number Memory 32 Mbytes 8M x 32 PC133 Memory DIMM 097503132 64 Mbytes 8M x 64 PC133 Memory DIMM 097503133 128 Mbytes 16M x 64 PC133 Memory DIMM 097803136 500 Sheet Feeder with Tray 097503131 Network Interface N A 500 Sheet Replacement Paper Tray 109R00722 Consumables Description Part Number Print Cartridge Phaser 3450 Laser Printer Standard Capacity 5K 106R01033 High Capacity 10K 106R01034 Service Parts Description Part Number Transfer Roller 022E29520 Fuser Assembly 110 V 126N00248 Fuser Assembly 220 V 126N00249 Hardware Kit 600N01672 Software and Documentation Description Part Number Software and Documentation CD 301N15890 Service Manual ONLY PDF FORMAT 9 26 Phaser 3425 Laser Printer Service Manual Wiring Diagrams In this chapter Print Engine Interconnect Diagram Map 1 Main Board Map 2 Connector Board Connection Diagram Chapter 10 Print Engine Interco
60. es are clear and continuous The diagonal lines might appear to be narrower than the others m Characters in the text paragraphs should be uniform and equal in density m The halftone patches should be uniform in appearance If the image does not meet the criteria refer to Non Uniform Image on page 5 8 or Character Defects on page 5 9 K4 IZ Print Quality Troubleshooting 5 5 Registration and Skew Fold the paper from two consecutive test prints in half first side edge to side edge and then top edge to bottom edge Observe the fold lines with reference to the crosshairs of the printed target The fold line should be aligned perpendicular to the target crosshairs and should be within 2 0 mm of the target crosshairs each line on the target is 1 0 mm If the image does not meet the criteria refer to Skewed Image on page 5 10 Se sun 295 SCAN co PROCESS Fold Line IX Skips or Smears Check the test print in the indicated areas for loss stretching or distortion of the image in bands across the process direction that make the image seem distorted blurred or compressed If these faults are observed refer to Skips Smears on page 5 10 5 6 Phaser 3425 Laser Printer Service Manual Print Quality Troubleshooting The following table provides examples or descriptions of various image or printing defects t
61. haft NS 40 Fuser Assy 110V 1 126N00248 Fuser Assy 220V 1 126N00249 41 PBA Main Zener NS 42 Interface PWBA 1 960K12210 43 IPR P Ground OPC NS 44 Tray 2 Empty Sensor Assy 1 130K68290 45 IPR P GND Solenoid Feed NS 46 IPR P GND SCF Main NS 47 IPR P GND Regi Roller NS 48 ELA HOU Varistor NS 49 IPR P GND Motor Mainz NS 50 IPR P GND Guide TR NS 51 AC Harness Assy 1 962K26720 52 Hinge M Front Guide Dup NS 53 Print Cartridge Interconnect Board 1 001N00468 54 55 56 Spring ETC Guide DEVE NS 57 PMO Guide DEVE L NS 58 PMO Guide DEVE R NS 59 Terminal P TR Cardinal NS 60 Sheet Cover TR NS 61 IPR P Ground Plate Paper NS 62 Exit Sensor 1 130E11100 63 Terminal P HV Cardinal NS 64 CBF Harness HVPS NS 65 CBF Harness Connector NS 66 CBF Harness Sensor NS 67 Tray 2 Tray 3 Feed Assy with 67 1 67 2 67 4 67 13 1 059K39120 67 3 Tray 2 Tray 3 Feed Roller 2 022E29530 Parts Lists 9 13 Service Parts List 9 4 Frame 2 Assembly Continued No Name Description Qty Part Number 68 Tray 2 3 Retard Assy with 68 1 68 13 1 022E29540 69 Shaft M Coupling Retard NS 70 Shaft M Gear Retard NS 71 Guide M Front NS 9 14 Phaser 3425 Laser Printer Service Manual Fuser Assembly 3450 186 Service Parts List 9 5 Fuser No Name Description Qty Part Number 0 Unit Fuser 110V 1 126N00248 Unit Fuser 220V 1 126N00249 Parts Lists
62. hat may be observed in the Phaser 3425 Laser Printer The table also lists possible causes and solutions Image Defect Possible Cause Solution No Image Blank Prints m Seal tape was not m Ensure that sealing tape has Prints have no visible removed from the been removed image cartridge m Verify Print Cartridge ground m Low or no toner m Verify continuity between the m Defective ground to cartridge ground and frame the Print Cartridge m Replace in the following order m Main Board m Print Cartridge m Incorrect high voltage m Main Board output from the Power Supply Board m Power Supply Board m Laser Assembly Light Prints All areas m Media paper m Verify paper meets printer of the print are light m Verify Remote Control specifications Print 20 to 30 Panel settings pages using the recommended m Seal tape was not paper pass from the m Verify that the Remote Control cartridge Panel is not set to Economode or that Toner Density menu is not m Low toner set to light R Ikan Roller m Ensure that the sealing tape has m Laser contamination or been removed obstruction m Verify low toner warning is not m Incorrect high voltage displayed on front panel Remove output the Print Cartridge and shake m Low ambient reinstall or replace temperature m Inspect the Transfer Roller for lt 10 C contamination and verify high voltage contacts Replace as required m Inspect the Laser assembly for any obstructions
63. he front section of the Top Cover to access the Interlock Switch cover 8 16 Phaser 3425 Laser Printer Service Manual 4 Using a small flat blade screwdriver pry outward to release the retainers 6 that secure the interlock switch cap and pull the cap free of the cover 3450 041 1 Interlock Switch 2 Switch Cap 5 Remove the Cover Open Interlock Switch NIC Board PL 9 1 41 1 Remove the Right Cover Assembly page 8 7 Caution Observe proper ESD procedures when removing or replacing any circuit boards in the printer Refer to General Notes on Disassembly on page 8 3 2 Remove 2 thumbscrews securing the NIC Board to the rear edge of the Main Board mounting bracket 3 Pull up on the front edge of the NIC Board to remove it from the connector CN 9 on the Main Board and remove the NIC Board to the right Service Parts Disassembly 8 17 Main Board PL 9 1 10 Note If the NIC Board is installed it must be removed see page 8 17 to access the retaining screws for the Main Board 1 Remove the Right Cover Assembly page 8 7 Caution Observe proper ESD procedures when removing or replacing any circuit boards in the printer Refer to General Notes on Disassembly on page 8 3 2 Disconnect all connectors from the Main Board Main Exit Sub Print Front Fan Laser Motor Fan Cartridge Panel CN15 cnio CNB CN21 CNG CN4 Cover e Open CT CITE SC CN20 Erase C MIG Lam ar CNI r cng ff Jen
64. ics to check Go to Step 3 Replace LSU laser motor operation Does the laser motor run 3 Does error recur Replace Main Complete Board Error Messages and Codes 3 15 Jam At Tray 1 2 3 or 0x01 The printer s front panel displays Jam At Tray 1 2 3 The active tray Tray 2 or Tray 3 has been removed reseated and locked into place Any obstructions media or debris has been removed from the input paper path Printer power has been cycled and the error still appears Troubleshooting Reference Applicable Parts Wiring and Plug Jack Map References Pickup unit Print Engine Interconnect Diagram on page 10 2 Tray 1 2 or 3 Solenoid Regi Clutch or Feed Clutch Feed Sensor Troubleshooting Procedure Steps Actions and Questions Yes No 1 Using the embedded diagnostics check Go to Step 2 Replace the operation of the tray solenoids Do the tray inoperative solenoids operate correctly solenoid 2 Using the embedded diagnostics check Go to Step 3 Replace the operation of the Regi Clutch and Feed defective clutch Clutch Do the clutches operate correctly 3 If paper feeds into the printer and the Jam Go to Step 4 Replace the error message appears use the embedded defective sensor diagnostics to check feed sensor or actuator operation Does the feed sensor operate correctly 4 Check the side guides for the inoperative Replace damaged Go to
65. igital Printer m Inspect Transfer Roller for ED contamination and good electrical Digital Printer contact replace if required Digital Printer m Clean PTL m Replace Power Supply Board Ghosting Image from m Operating environment m Printer is installed in specified the previous page prints m Media paper environment l on consecutive pages m Print Cartridge m Verify that paper meets printer m Transfer Roller specifications Print 20 to 30 pages using recommended m Fuser assembly paper m Incorrect high voltage s Determine ghosting pitch and outputs replace the corresponding assembly NOTE Refer to Defects Associated with Specific Printer Components on page 5 2 for defect pitch m Replace Power Supply Board Non Uniform Image m Print Cartridge m Ensure that Cartridge is not out of The Line darkness and s Print Cartridge toner Inspect Drum for solid area density image grounding deterioration or contamination H Unstable high voltage If defective replace the Print vary across the print aune g g Cartridge m Transfer Roller m Verify Print Cartridge ground Digita contamination Check continuity between g m Laser Window or optic cartridge ground contact and Digita contamination frame ground Ensure that drum Pg contact is clean and undamaged Digita m Inspect the Transfer Roller spring Digita tension and bearing contacts Ng m Remove Laser assembly clean Digita window or replace assembly as necessary m Replace Power Supply
66. in toner and appear to be operating Cartridge Cartridge properly Interconnect Board 4 14 Phaser 3425 Laser Printer Service Manual Print Quality Troubleshooting In this chapter Print Quality Problems Overview Defects Associated with Specific Printer Components Front Panel Test Print Print Quality Troubleshooting Chapter Print Quality Problems Overview Print quality defects can be attributed to printer components consumables media internal software external software applications and environmental conditions To successfully troubleshoot print quality problems as many variables as possible must be eliminated The first step is to generate prints using printable pages embedded in the printer on laser paper from the approved media list The paper should be from an unopened ream that has been acclimated to room temperature See the approved media list from Xerox Supplies on page 9 25 for media that has been tested and approved for use in the Phaser 3425 Laser Printer If the print quality defect is still present when printing on approved media from an unopened ream of paper then components software applications and environmental conditions need to be researched When analyzing a print quality defect first determine if the defect is repeating or random Repeating defects can often be associated with a particular component The visible surfaces of all rollers should be inspected for obvious defects D
67. inuous printing First Print Out 12 Letter in seconds 13 A4 Warm up time Power on Boot 50 seconds or less Electrical Specifications Characteristic Specification Primary line voltages 100 127 V Printer 90 135 V 13 amp circuit 220 240 V Printer 180 264 V 7 8 amp circuit Primary line voltage 100 120 V Printer 50 60 Hz 3 Hz frequency range 220 240 V Printer 50 60 Hz 3 Hz Power consumption Mode Condition 100 115 VAC 240 VAC Print Mode Max 450 W or less 450 W or less Ready Mode Fuser On 100 W or less 100 W or less Sleep Mode Fuser Off 15 W or less 15 W or less 1 12 Phaser 3425 Laser Printer Service Manual Environmental Specifications Characteristic Specification Temperature Operating Storage Unpacked Packed 24 month maximum Optimal print quality range 17 to 26 C 62 to 80 F 10 C to 32 C 50 F to 89 F 52 C to 35 C 412 F to 95 F 20 C to 50 C 42 F to 1302 F Humidity Optimal print quality range 35 to 70 Operating 20 80 Storage Unpacked 20 80 Storage 10 90 Altitude Operating 0 2 500 meters 8 200 ft Low Altitude Setting High Altitude Setting Transportation 0 2 050 meters 6 726 ft 2 050 2 500 meters 6 726 8 200 ft 0 6 092 meters 20 000 ft Acoustic Noise Idle Printing 35 0db or less 49 0db or less Duplex Printing Media Sizes Specification Trays Support
68. is picked up by the Exit Rollers the drive direction is reversed to send the paper down to the Duplex Unit As the paper passes through the Duplex Unit it activates the Duplex Sensor This in turn activates the feed roller to position the paper for printing on the second side Theory of Operation 2 13 2 14 Phaser 3425 Laser Printer Service Manual Error Messages and Codes m Introduction Chapter Introduction This section covers troubleshooting procedures for the Phaser 3425 Laser Printer front panel error messages and codes Only jams and fatal errors will produce an associated numeric code Error messages and codes are generally specific making it important that service personnel and users record errors exactly when reporting problems with the printer Any code associated with an error message or jam can be viewed by displaying the Fault History or Jam History on the front panel Some procedures require running service diagnostic test functions to verify a specific printer part is operating correctly For information on Service Diagnostics and all internal printer test functions see the table Service Diagnostics Menu Map on page 3 9 To troubleshoot problems such as start up and power on media paper path print quality or image problems and electrical failures not associated with a front panel message or code refer to the section General Troubleshooting on page 4 1 or to Print Quality Troubleshooting on page 5 1
69. ith PCLSe The default setting for Simplex Top Left is 0 0 Margins Duplex Top Left The Duplex Top and Left adjustment provides a method of changing the margin settings for the first imaged side of a duplex page The duplex margin settings can be used with or without a print driver The default setting for Duplex Top Left is 0 20 Resetting NVRAM Resetting NVRAM returns all the System Control Board NVRAM stored parameters to their factory default values The print counts and the Adobe firmware serial number are not affected by this reset You can reset the PostScript NVRAM using the Troubleshooting Service Tools Menu 6 2 Phaser 3425 Laser Printer Service Manual Cleaning and Maintenance In this chapter m Service Preventive Maintenance Procedure Chapter Service Preventive Maintenance Procedure Perform the following procedures whenever you check service or repair a printer Cleaning the printer as outlined in the following steps assures proper operation of the printer and reduces the probability of having to service the printer in the future The frequency of use and the type of paper a customer prints on determines how critical and how often cleaning the machine is necessary Record the number of sheets printed Recommended Tools Toner vacuum cleaner Clean water Clean dry lint free cloth Black light protective bag Cleaning Caution Never apply alcohol to any parts in the printer Neve
70. its ground connection contact with conductive parts may cause an electrical shock Disconnecting Power Turning the power off using the On Off switch does not completely de engergize the printer You must also disconnect the printer power cord from the AC outlet Position the power cord so that it is easily accessible during servicing so that you may power down the printer during an emergency Disconnect the power plug by pulling the plug not the cord Disconnect the power cord in the following cases m if the power cord or plug is frayed or otherwise damaged M if any liquid or foreign material is spilled into the case m if the printer is exposed to any excess moisture m if the printer is dropped or damaged m if you suspect that the product needs servicing or repair E whenever you clean the product Service Manual v Electrostatic Discharge ESD Precautions Some semiconductor components and the respective sub assemblies that contain them are vulnerable to damage by Electrostatic discharge ESD These components include Integrated Circuits ICs Large Scale Integrated circuits LSIs field effect transistors and other semiconductor chip components The following techniques will reduce the occurrence of component damage caused by static electricity Be sure the power to the chassis or circuit board is off and observe all other safety precautions vi Before handling any semiconductor components assemblies drain the
71. l interlock switches are functioning correctly after you have completed a printer service call If you bypass an interlock switch during a service call use extreme caution when working on or around the printer CLASS 1 LASER PRODUCT The Phaser 3425 Laser Printer is certified to comply with Laser Product Performance Standards set by the U S Department of Health and Human Services as a Class 1 Laser Product This means that this is a class of laser product that does not emit hazardous laser radiation this is possible only because the laser beam is totally enclosed during all modes of customer operation The laser is not hazardous during servicing if you follow the procedures specified in the manual Service Manual vii Servicing Electrical Components Before starting any service procedure switch off the printer power and unplug the power cord from the wall outlet If you must service the printer with power applied be aware of the potential for electrical shock Warning Turning the power off by using the On Off switch does not completely de energize the printer You must also disconnect the printer power cord from the AC outlet Position the power cord so that it is easily accessible during servicing Warning Do not touch any electrical component unless you are instructed to do so by a service procedure Servicing Mechanical Components When servicing mechanical components within the printer manually rotate drive assemblies
72. ly PL 9 1 11 8 19 Tray 2 Solenoid PL 9 1 28 8 21 Tray 2 No Paper Sensor PL 9 3 44 8 21 Paper Size Sensor PL 9 3 36 8 22 Exit Motor Drive Assembly PL 9 1 20 8 22 Main Fan Assembly PL 9 1 19 8 23 Sub Fan Assembly PL 9 3 35 8 24 Exit Roller Assembly PL 9 3 21 Transport Roller Assembly PL9 3 24 wabad KG PAHINA DALE AG a DL 8 25 Laser Assembly PL 9 1 16 8 27 Print Cartridge Interconnect Assembly PL 9 3 53 8 29 Registration Transport Assembly PL 9 1 9 8 30 Registration Sensor PL 9 7 10 8 31 Tray 1 Feed Roller Assembly PL 9 3 2 8 31 Tray 1 Pick Roller PL 9 3 2 4 8 35 Tray 2 Retard Assembly PL 9 3 7 8 36 Tray 2 Paper Pick Assembly PL 9 3 67 8 36 Tray 2 Pick Roller PL 9 3 67 3 8 41 Power Supply Board PL 9 1 13 8 42 Duplex Assembly PL 8 8 2 8 45 Exit Sensor PL 9 3 62 8 45 9 Parts Lists Using the Parts List 9 3 Phaser 3425 Laser Printer Print Engine Parts 9 4 Main Unit Ta Z rE Re le teed ad 9
73. moval loosen the screws securing the Laser Assembly sufficiently to route the fan cable under the laser Install the Sub Fan with the label facing in to ensure proper air flow Exit Roller Assembly PL 9 3 21 Transport Roller Assembly PL9 3 24 1 Remove the Print Cartridge page 8 4 and protect it from light 2 Remove the Top Cover Assembly page 8 9 Service Parts Disassembly 8 25 3 Using a small flat blade screwdriver spread the plastic latch hooks on the bottom of the bearing while pulling up on the left end of the Exit Roller shaft 3450 054 1 Bearing 2 Exit Roller 3 Exit Idler Roller Assemblies 4 Press down on the tab securing the Exit Roller gear to the shaft Remove the gear 5 Repeat the procedure for the bearing on the right end of the Exit Roller shaft and remove the shaft 3450 055 1 Bearing 2 Exit Gear 6 Lift the Exit Shaft Assembly out of the exit frame Caution The Exit Idler Roller Assemblies are not captured in the exit frame and can be dropped 7 Lift the Exit Idler Roller Assemblies out of the exit frame 8 26 Phaser 3425 Laser Printer Service Manual 8 Using a small flat blade screwdriver spread the plastic latch hooks on the bottom of the bearing while pulling the left end of the Transport Roller Shaft Assembly to the rear 9 Continue pulling the Transport Roller Shaft Assembly to the rear to remove it from the center bearing 3450 056 10 Press down on the
74. n Function Description Display HVPS Dev Bias Developer Bias 500V turns on Dev Bias when OK is pressed and goes off Test ON when Cancel is pressed Measure OFF voltage with a DMM if required Charge Roll Charge Roller Voltage 1200V Charge Roll turns on when OK is pressed and Test ON goes off when Cancel is pressed OFF Returns an ADC value for voltage Transfer Positive Transfer Voltage 1200V Transfer Roll turns on when OK is pressed and Roll Test goes off when Cancel is pressed ON OFF Returns an ADC value for voltage Transfer Negative Transfer Voltage 800V Transfer Roll turns on when OK is pressed and Roll goes off when Cancel is pressed ON OFF Measure voltage with a DMM if required Pre transfer PTL turns on when OK is pressed PTL Lamp PTL and goes off when Cancel is ON OFF pressed Visual confirmation is possible with the cover open and the Print Cartridge out Laser Laser Diode Laser Diode turns on when OK is Laser Diode Scanning pressed and goes off when Cancel Test ON Unit LSU is pressed OFF Laser Displays the appropriate message Laser Ready when the LSU is ready to print laser Ready Test diode is on polygon speed stable Pass Error Fuser Fuser When Target Temp displays Target Control default is 150 C use the arrow Current buttons to change target if desired XXX XXX and press OK The target temp and O current temp will display on the bottom line Change
75. n and OvervieW 2 0 cece eee eens 1 2 Printer Configurations 1 3 Parts ofthe Printer 542258044828 aa RE nl 1 4 XTC MO Mics au donnent deme des Arend anne dima NANG mas 1 4 Phaser 3425 Front Panel Configuration 1 5 Phaser 3425 Laser Printer Rear View 1 6 Main Board x cvs kaaga ahead baie LANG uh kman iha 1 7 Service PANIS na NG Paw ee tente e den mane BAWANG 1 8 Consumables 42552488 ease ha kd NG PAKA nets Reged hash hbng 1 9 Supply Life Counter Behavior a an nananana 1 10 Printer Specifications 1 11 Physical Dimensions and Clearances 1 11 Functional Specifications 1 12 Electrical Specifications 1 12 Environmental Specifications 1 13 Duplex Printing Media Sizes 1 13 Media and Tray Specifications 1 14 2 Theory of Operation Overview of the Phaser 3425 Laser Printer 2 2 Summary of the Printing Process 2 2 Print MOOS NAG KENA DANGAN HI wide MG Ste ee Laba 2 3 Printer Controls 2 4 Paper Size Control 2 4 Selective Control Paper Pick 2 4 Laser Light Intensity Control
76. nd locked into place Any obstructions media or debris has been removed from the fuser paper path Printer power has been cycled and the error still appears Troubleshooting Reference Applicable Parts Wiring and Plug Jack Map References Fuser heat lamp Print Engine Interconnect Diagram on page 10 2 Fuser overheat thermostat Thermistor Main Board Troubleshooting Procedure Steps Actions and Questions Yes No 1 Remove Fuser Go to Step 2 2 Check resistance of overheat thermostat Replace Fuser Go to Step 3 Is thermostat open 3 Check resistance of thermistor Is Replace Fuser Go to Step 4 thermistor open 4 Check resistance of heat lamp Is heat Replace Fuser Replace Main lamp open Board 3 14 Phaser 3425 Laser Printer Service Manual LSU Error or 0x5A The printer s front panel displays Laser Failure The LSU has been removed reseated and locked into place Any obstructions media or debris has been removed from the paper path Printer power has been cycled and the error still appears Troubleshooting Reference Applicable Parts Wiring and Plug Jack Map References LSU Print Engine Interconnect Diagram on page 10 2 Print Engine Controller Board Troubleshooting Procedure Steps Actions and Questions Yes No 1 Check that the laser connectors are Go to Step 2 Reseat the properly seated connectors 2 Use the embedded diagnost
77. nnect Diagram in dentify specific connectors CN with in components 1agram to 1 d h respect to the ma ing interconnect Use the follow inter Wit the pr 661 0SrEs due ZENO eno sto DI ino PA PAG owe GITE DIA L N mo g ABIL uej qng gt ras rf TA ES Josuag Ave L NS Aduz Atay So dos uey uleyy X F Z EE plouajos Tre Z mois 7 BEI 2 awa UR att 6 kei EE Nr L ONG v 1171971934 eooo EEE CC Moa on TE pioug og Japaay or 7 eine Nive Z T 7 z IRL w E oes T SAP 1884S 005 BWO LE ons 1 Cr CE EEE po yanig ZH sss 1 HC on 8 REE CH A Fe uolyesys bay foro e e wno d015 IHVIS FA 1030 ESA zz Yd T ang 54 al BAHA UEN FA E i on ENO EE indul ov Z aNd De 90n 02 T 3 T or z nof awe nf o4 ror me ST 4E8H Jasna rr 7 ar Wii AH 9H U d ad TL LTR TNT 100 XI tv e WAHL i EN 7 7 aT e Ate n Hras s d puues a Em 9 T Ong s o o 6 Langan r wud jaued EE e AN OL owe quol4 Leno EE fe ane ow Pana iano THN Tr AEC 5A 9 LE NI ssn a Em Josuag F YN ENS tr e Wena Twists 7 uxg lasng pieog peog HAH o a uadg 18109 SA be a 09UU0019 U SA ve r Are L 49109 SA ve abc Nye al TI NIGino L Oo F pigog 10SU3S U tsa ano Es in Op Hm o easa 6 easa z a215 Jaded 1n01806d Er e amsa raisa T Et e emm a po wom 65 PE a a w Josuag GO o O e 9191 d ZI NO amp N9 L EE EE uh uopesibay fy het e CEE
78. nsor Print Engine Interconnect Diagram on page 10 2 Main Board Troubleshooting Procedure Steps Actions and Questions Yes No 1 Check the operation of the sensor actuator Replace sensor Go to Step 2 Does the actuator bind or show signs of actuator damage 2 Use the embedded diagnostics to check Replace Main Replace Tray Full operation of the Tray Full Sensor Does the Board Sensor sensor operate correctly Error Messages and Codes 3 19 Replace Print Cartridge 0x53 or Invalid Print Cartridge 0x55 The printer s front panel displays Replace Print Cartridge The Print Cartridge has been replaced with the correct Xerox Print Cartridge Printer power has been cycled and the error still appears Troubleshooting Reference Applicable Parts Wiring and Plug Jack Map References Cover open interlock switch Print Engine Interconnect Diagram on page 10 2 Switch actuator lever Main Board Troubleshooting Procedure Steps Actions and Questions Yes No 1 Is the switch actuating lever on top of the Replace Print Go to Step 2 Print Cartridge damaged Cartridge 2 Is the Cover Open Switch connector Go to Step 3 Reconnect CN20 CN20 properly connected to the Main Board 3 Use the embedded diagnostics to check Replace the Main Replace the operation of the Cover Open Switch Does Board Cover Open the switch operate correctly Switch 3 20 Pha
79. nual Tray 2 No Paper Sensor 8 21 Tray 2 Paper Pick Assembly 8 36 Tray 2 Pickup Roller 8 41 Tray 2 Retard Assembly 8 36 Tray 2 Solenoid 8 21 U Using the Parts List 9 3 Using the Troubleshooting Procedures 3 5 V Voltage Measurements 3 7 X Xerox Supplies and Accessories 9 25 Index 3
80. o to Step 3 b Are parts missing Assembly 3 a Is Tray 2 Feed Solenoid release arm binding Repair or Go to Step 4 or unable to move freely Refer to Service replace Diagnostics Menu Map on page 3 9 solenoid 4 a Does Tray 2 Pick Roller rotate when the Go to Step 5 Replace Pick Solenoid actuates Refer to Service Roller Diagnostics Menu Map on page 3 9 Assembly 5 a Is the feed roller dirty Clean if dirty Replace Tray 2 Assembly Replace Main Board General Troubleshooting 4 7 Paper Mis feed from Tray 3 Optional Feeder Troubleshooting References Applicable Parts Wiring and Plug Jack Map References Main Board Tray 3 Assembly Procedure Step Action and Questions Yes No 1 a Is paper loaded correctly Go to Step 2 Load paper correctly 2 a Is the tray damaged Replace Tray 3 Go to Step 3 b Are parts missing Assembly 3 a Is Tray 2 chute obstructed Clear Go to Step 4 obstruction 4 a Is the interface connector between the Replace Go to Step 5 printer and Tray 3 damaged interface harness 5 a Does Tray 3 Pick Roller rotate when the Go to Step 5 Replace Tray 3 Solenoid actuates Refer to Service Assembly Diagnostics Menu Map on page 3 9 6 a Are the feed roller or retard drag pads dirty Clean if dirty Replace Tray 3 Assembly Replace Main Board 4 8 Phaser 3425 Laser Printer Service Manual Jam At Tray 1 2 3 Jam 0 Paper jam
81. oller assembly Replace as necessary m Inspect paper transportation areas for proper operation m Inspect clean replace Fuser assembly as necessary Skips Smears Skips m Paper transportation m Inspect paper transportation loss or stretching of the s Main drive motor areas for proper operation image in bands across assembly baet man lag Aa apr the process direction s Saa a Seek Riplace ag necessary Smears me G q m Inspect clean replace Fuser the image in bands assembly as necessary page 8 5 across the process m Replace Print Cartridge direction Causes image to appear blurred or compressed OHP Print Distortion m Remote Control Panel m Verify Remote Control Panel is Trembling appearance settings configured to Transparency when printing on m Recommended Media mode transparencies m Transfer roller voltage ee meets printer m Inspect the Transfer Roller spring tension and bearing contacts m Replace Power Supply Board 5 10 Phaser 3425 Laser Printer Service Manual Adjustments and Calibrations In this chapter m Resetting NVRAM Chapter 6 Margin Calibration The Margin Calibration has no effect on the printer s image registration Image registration is not adjustable on the Phaser 3425 Laser Printer Margins Simplex Top Left The Simplex Top and Left adjustment provides a method of changing the margin settings when a print driver is not being used The simplex margin settings are only effective w
82. on in Xerox Phaser 3425 Laser Printer Service Training is strongly recommended Phaser 3425 Laser Printer Shown With Optional Tray 3 1 2 Phaser 3425 Laser Printer Service Manual Printer Configurations The Phaser 3425 Laser Printer combines a 25 page per minute monochrome print engine with an image processor supporting PostScript 3 PCL6 Windows and KSC5843 and KSSM DOS page description languages The printer supports resolutions of 600 and 1200 dots per inch dpi image quality Configuration upgrades available for the Phaser 3425 Laser Printer include a 500 sheet feeder Features Phaser 3425 Phaser 3425PS Ports USB 2 0 Parallel USB 2 0 Parallel 10 100 Base TX 10 100 Base TX Processor 266 MHz 266 MHz es 500 Sheet 500 Sheet PA FAR y Optional 2nd 500 Sheet Tra Optional 2n 500 Sheet Tra Multi Purpose Tray 100heet 100 Sheet Gust 250 sheets face down 100 250 sheets face down 100 p sheets face up sheets face up Max Duty Cycle 100K mo 100K mo CRU 5K with Printer 5K with Printer 5K or 10K replacementCRUs 5K or 10K replacementCRUs ERP United States s5500 s5600 kx The postscript is not an option The customer must be buy a Phaser 3425PS if need this feature General Information 1 3 Parts of the Printer Exterior 1 Tray 1 MPT 2 Tray 2 500 Sheet Feeder 3 Tray 3 Optional 500 Sheet Feeder 4 Paper Level Indicator 5 Right Main Board Cover 3450 160 Output Support Front Panel Top
83. ower and disconnect the power cord from the wall outlet 2 Remove the Imaging Unit and protect it from exposure to light by covering it with a light proof bag or by placing it in a light tight container Disconnect all computer interface cables from the printer 3 Wear an electrostatic discharge wrist strap to help prevent damage to the sensitive electronics of the printer circuit boards 4 Remove the Fuser Assembly or wait at least 5 minutes after you have switched OFF printer power for the Fuser to cool before you work on or around the Fuser 5 Tray 2 can interfere with the removal of many printer parts Remove Tray 2 before further disassembly Note Part names that appear in the disassembly procedures may not exactly match the names that appear in the Parts List For example a part called the Registration Transport Assembly may appear on the Parts List as Assembly Transport Regi Caution Many parts are secured by plastic tabs DO NOT over flex or force these parts Do not over torque the screws threaded into plastic parts Always use the correct type and size screw Using the wrong screw can damage tapped holes Do not use excessive force to either remove or install either a screw or a printer part A spring hook is required for removal and replacement of the various springs in the printer Springs can be damaged using pliers or other tools for this task Warning Unplug the AC power cord from the wall outlet before removing any p
84. page 8 27 2 If the NIC Board is installed remove it page 8 17 3 Disconnect CN 4 CN 8 and CN 9 from the Print Cartridge Interconnect CN 7 U Assembly 53450 059 4 Disconnect CN 6 from the Main Board 5 Remove the 3 screws securing the Print Cartridge Interconnect Assembly and remove the Assembly 53450 171 8 29 Service Parts Disassembly Registration Transport Assembly PL 9 1 9 1 Remove the Print Cartridge page 8 4 and protect it from light 2 Remove the Top Cover Assembly page 8 9 3 Disconnect the connector from the Registration Sensor 83450 062 4 Remove the 4 screws that secure the Registration Transport Assembly to the chassis 5 Lift up on the latch handle at the front and remove the gear cap item 1 at the right end of the Registration Transport Assembly Note The gear cap is the same color black as the printer frame and can be difficult to see Look at the right end of the Registration Transport Assembly and you will see the cap just to the right of the bearing 53450 063 8 30 Phaser 3425 Laser Printer Service Manual 6 Lift the Registration Transport Assembly out of the printer Registration Sensor PL 9 7 10 1 Remove the Registration Transport Assembly page 8 30 2 Remove 1 screw accessed from the bottom of the Assembly that secures the Registration Sensor to the Registration Transport Assembly and remove the Sensor Holder and the S
85. pecifications Physical Dimensions and Clearances Print Engine Dimensions Value Height 326 mm 12 90 inches without optional cassette Width 386 mm 15 20 inches Depth 446 mm 17 56 inches Weight 13 7 Kg 30 2 Lbs Optional Feeder Cassette Dimensions Value Height 158 mm 6 22 inches Width 380 mm 14 96 inches Depth 446 mm 17 56 inches Weight 5 4 Kg 11 9 Lbs with packaging Clearance Value Top 350 mm 13 78 inches Left 100 mm 3 9 inches Right 100 mm 3 9 inches Front 482 6 mm 19 inches Rear 320 mm 12 6 inches Mounting surface level tolerance Within 2 degrees of horizontal with all four feet in contact with the surface General Information 1 11 Functional Specifications Characteristic Specification Printing process Non Impact Electrophotography Color medium Monochrome Resolution True 600 x 600 dpi Addressability Addressable 1200 x 1200 dpi Operating Modes Running Mode Print Engine capable of making prints immediately Ready Mode 20 seconds from completion of a print Sleep Low Power Power Saver Mode entered after a specified period of Print Engine inactivity since completion of the last print Continuous Operating Letter Printing Speed 25 ppm Simplex 14 ipm Duplex A4 ppm pages per minute 24 ppm Simplex 13 ipm Duplex ipm image per minute Cleaning Cycle interval for cont
86. r dust or loose toner Do not use solvents or chemical cleaners to clean the printer interior Do not use any type of oil or lubricant on printer parts Use only an approved toner vacuum Clean all rubber rollers with a lint free cloth dampened slightly with cold water Inspect the interior of the printer for damaged wires loose connections toner leakage and damaged or obviously worn parts 11 If the Print Cartridge appears obviously damaged replace with a new one Step 3 Find the Cause of the Problem 1 ba Use the Error Messages and Codes and troubleshooting procedures to find the cause of the problem Use Diagnostics to check printer and optional components Use the Wiring Diagrams and Plug Jack Locator to locate test points Take voltage readings at various test points as instructed in the appropriate troubleshooting procedure Use the Front Panel Test Print on page 5 3 to isolate problems with the Main Board 3 4 Phaser 3425 Laser Printer Service Manual Step 4 Correct the Problem i 2 Use the Parts List to locate a part number Use the Removal and Replacement Procedures to replace the part Step 5 Final Checkout 1 Test the printer to be sure you have corrected the initial problem and there are no additional problems present Using the Troubleshooting Procedures 1 Each Step in a Troubleshooting Procedure instructs you to perform a certain action or proc
87. r Size Sensor PL 9 3 36 Note If the optional Tray 3 Feeder is installed it must be removed before perfoming this procedure 1 Remove the left cover from the printer page 8 8 2 If Tray 2 has not already been removed remove it now 3 Disconnect CN 1 to the Print Cartridge Interconnect Board from the Paper Size Sensor 4 Gently turn the printer upside down Note The Paper Size Sensor can be removed and replaced without removing the rear crossbar However to provide improved access remove the crossbar screw above the Paper Size Sensor and loosen the screw on the other side so you can swing the crossbar out of the way 5 On the left side of the printer remove 2 screws one on either side of the rear crossbar that secure the Paper Size Sensor to the printer chassis 6 Pull up on the sensor assembly until it is clear of the mounting pins and then remove it from the printer Exit Motor Drive Assembly PL 9 1 20 1 Remove the Print Cartridge page 8 4 and protect it from light 2 Remove the Top Cover Assembly page 8 9 3 Disconnect the Exit Motor Drive harness connector from the Exit Motor 8 22 Phaser 3425 Laser Printer Service Manual 4 Remove 3 screws that secure the Exit Motor Drive Assembly to the printer chassis and remove the drive assembly 83450 052 Caution Do not lose the thermal insulating washers on each of the mounting screws between the screw head and the motor Main Fan Assembly PL 9
88. r use a damp cloth to clean up toner If you remove the Print Cartridge place it in a light protective bag Exposure to light can degrade its performance and result in early failure Record number of sheets printed Print several sheets of paper to check for problems or defects Turn off the printer Remove any debris or foreign objects a bb WN Remove any loose toner from the interior of the printer using a Type II toner vacuum only o Remove and clean the paper trays mg Clean pick rollers with a slightly damp lint free cloth 7 2 Phaser 3425 Laser Printer Service Manual Printing a Cleaning Sheet If you are experiencing blurred faded or smeared printouts you may be able to correct the problem by printing either or both of the cleaning sheets available in the Troubleshooting Service Tools menu The Fuser Clean sheet cleans toner debris out of the Fuser and the Print Cart Clean sheet cleans the drum in the Print Cartridge Print the cleaning sheets as follows 1 2 Use the arrow buttons to scroll through the menu until Troubleshooting Ensure that the printer is turned on at the Ready state and with approved paper loaded in the tray Press the Menu button on the Front Panel Menu Information displays displays on the bottom line Press OK Troubleshooting Margins displays Press the down arrow button to display Service Tools on the bottom line and press OK Service Tools Tes
89. radio television technician for help Changes or modifications not expressly approved by Xerox can affect the emission and immunity compliance and could void the user s authority to operate this product To ensure compliance use shielded interface cables A shielded parallel cable can be purchased directly from Xerox at www xerox com office supplies Xerox has tested this product to internationally accepted electromagnetic emission and immunity standards These standards are designed to mitigate interference caused or received by this product in a normal office environment This product is also suitable for use in a residential environment based on the levels tested In the United States this product complies with the requirements of an unintentional radiator in part 15 of the FCC rules Operation is subject to the following two conditions 1 this device may not cause harmful interference 2 this device must accept any interference received including interference that may cause undesired operation This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications ICES 003 Le present appareil num rique n met pas de bruits radio lectrique d passant les limits applicables aux appareils num riques de la classe B prescrites dans le R glement sur le brouillage radio lectrique dict par le ministere de
90. rate correctly Error Messages and Codes 3 17 Jam At Duplex 0x04 or Jam At Tray 0x05 The printer s front panel displays Jam At Duplex or Jam At Tray Any obstructions media or debris has been removed from the duplex paper path Printer power has been cycled and the error still appears Troubleshooting Reference Applicable Parts Wiring and Plug Jack Map References Duplex Sensor Print Engine Interconnect Diagram on page 10 2 Duplex Assembly Power Supply Board Main Board Transport Roller Shaft Assembly Troubleshooting Procedure Steps Actions and Questions Yes No 1 Does paper jam after reversal but before Replace Transport Go to Step 2 reaching duplex sensor Roller Shaft Assembly 2 Does problem recur Replace Duplex Complete Assembly 3 If paper jam occurs at the Feed Roller use Replace the Replace the the embedded diagnostics to check Power Supply Duplex Sensor operation of the Duplex Sensor Board Does the sensor operate correctly 4 Does problem recur Replace the Main Complete Board 3 18 Phaser 3425 Laser Printer Service Manual Output Tray Is Full or 0x44 The printer s front panel displays Output Tray Is Full The output tray has been emptied of all paper Printer power has been cycled and the error still appears Troubleshooting Reference Applicable Parts Wiring and Plug Jack Map References Tray Full Se
91. ray runs out of paper the sensor will send a signal to the Main Board the control panel LED will blink yellow and the Paper Out message for the appropriate tray will display on the control panel Theory of Operation 2 11 Paper Feed Sequence When the Main Board is ready to feed paper it energizes the paper feed solenoid The solenoid armature releases the media unit clutch and the pick up roller makes one revolution This drives the paper to the feed roller and retard roller The pick up roller is designed with one flat side The flat side always faces the paper supply when not feeding paper This shape allows paper to be moved in and out of the assembly The feed roller and retard roller drive the paper to the registration transport assembly which in turn drives the paper towards the transfer area Before arriving at the transfer area the paper actuates the Registration Sensor Registration Sensor The Registration Sensor has two purposes First it is used to monitor paper movement If the paper takes too long getting to the sensor or it stays at the sensor location too long the Main Board will shut down the machine the control panel LED will blink red and a Jam error message will display on the control panel Second the signal generated by the sensor tells the Main Board that the paper is almost at the transfer area and it is time to start the xerographic process It is important that the leading edge of the paper enters the
92. rd is pressed and stops when Cancel Backward is pressed ON OFF Tray 3 Tray 3 motor runs when OK buttonis Tray 3 Motor Motor pressed and stops when Cancelis ON OFF pressed If Tray 3 is not installed test does not run Tray 3 Not Installed displays Fan Sub The sub fan runs after OK button is Fan Sub pressed and stops when Cancel is ON OFF pressed Fan Main The main fan runs after OK button is Fan Main pressed and stops when Cancel is ON OFF pressed Solenoid Tray 1 When OK button is pressed Tray 1 Tray 1 Clutch Solenoid solenoid is energized for 150 msec Solenoid then automatically de energized ON OFF Tray 2 When OK button is pressed Tray 2 Tray 2 Solenoid solenoid is energized for 150 msec Solenoid then automatically de energized ON OFF Tray3 When OK button is pressed Tray 3 Tray 3 Solenoid solenoid is energized for 150 msec Solenoid then automatically de energized ON OFF Reg Clutch When OK button is pressed Regi Reg Clutch clutch is energized for 1 sec then ON OFF automatically de energized Main motor runs 2 sec before clutch is energized to enable checking the clutch state Tray 3 When OK button is pressed Tray3 Tray 3 Clutch clutch is energized for 1 sec then Clutch automatically de energized ON OFF Main motor runs 2 sec before clutch is energized to enable checking the clutch state If Tray 3 not installed test does not run Tray 3 Not Installed displa
93. reinstalled via CentreWare if the NIC Board is installed or by a downloadable PJL command B RAM DIMM ROM DIMM CI 1 2 3450 193 1 Memory RAM DIMM 2 Flash Memory ROM DIMM General Information 1 7 Service Parts 3450 163 3 Fuser Assembly Feed Roller i 2 Transfer Roller Phaser 3425 Laser Printer Service Manual 1 8 Consumables WLW LAV NO 3450 164 1 Print Cartridge 1 9 General Information Supply Life Counter Behavior An internal counter tracks copy count information and stores the values in NVRAM The Main Board monitors this counter in order to display the near end of life and end of use messages Consumable toner print cartridge usage is tracked by the CRUM and monitored by the Main Board in order to display the near end of life and end of life messages The value currently stored in print cartridge cycles can be viewed using the Read OPC Cycle Service Diagnostic The trigger values are as follows m 10K Cartridge 78 000 Toner Low 92 000 Replace Cartridge m 5K Cartridge 39 000 Toner Low 46 000 Replace Cartridge Life ratings are based on 5 coverage and an average 4 page job length Consumables Print Life Print Cartridge High Capacity 10 000 Standard Capacity 5 000 Service Parts Fuser Assembly 125 000 Transfer Roller 125 000 Feed Roller Kit 125 000 1 10 Phaser 3425 Laser Printer Service Manual Printer S
94. rings Note Be sure that you reinstall the ground wire on the right side of the Duplex Guide Plate Tray 2 Pick Roller PL 9 3 67 3 1 Remove the Tray 2 Paper Pick Assembly page 8 36 2 Remove the spring release from the shaft on the left side of the pick roller shaft Caution Be careful not to drop the spring during removal 3 Remove the bearing on the right end of the pick roller shaft and slide the end of the shaft to the right to disengage the shaft coupling 4 Pull the center shaft out of the retaining clips 5 Pull the segmented roller off of the roller core 6 Slide the new segmented roller on to the roller core and reassemble the Paper Pick Assembly by reversing the previous steps Service Parts Disassembly 8 41 Reassembly Notes Caution When reinstalling the Pick Roller be careful not to damage the springs Power Supply Board PL 9 1 13 1 Remove the Duplex Guide Plate from the printer page 8 36 Steps 1 through 8 2 Slide the Tray 2 Paper Out Actuator item 1 to the left until the end is free of the retainer clip then lift up to remove it from the printer Right 3450 178 8 42 Phaser 3425 Laser Printer Service Manual 3 Remove 9 screws and slightly lift the Duplex Assembly from its mounting location Note The screw that secures the ground wire to the back edge of the assembly is the short machine screw Caution Do not attempt to remove the Power Supply Board A
95. rinter part Notations in the disassembly text m The notation item XT points to a numbered callout in the illustration corresponding to the disassembly procedure being performed B The notation PLX X X indicates that this component is listed in the Service Parts List m Bold arrows in an illustration show direction of movement when removing or replacing a component Service Parts Disassembly 6 3 Removing Service Parts and Consumables Routine Maintenance Items for the Phaser 3425 Laser Printer include the Transfer Roller and Fuser Assembly Consumables consist of the Print Cartridge Print Cartridge Removal PL 9 1 8 1 Power down the printer and disconnect the power cord from the wall outlet 2 Open the top cover on the printer 3 Grasp the handle on the top of the Print Cartridge and pull it toward the front of the printer while also lifting it out of the printer 4 Place the Print Cartridge in a light proof bag or other light proof container Caution Leaving the Print Cartridge exposed to light for periods in excess of a few minutes can degrade its performance and result in early failure Transfer Roller Removal PL 9 1 23 1 Power down the printer and disconnect the power cord from the wall outlet 2 Open the top cover 3 Remove the Print Cartridge and protect it from exposure to light 8 4 Phaser 3425 Laser Printer Service Manual 4 Lift the lever on the Bearing Clip at each end of the Tran
96. s Not Used Power J Supply Board C CN18 i RAM DIMM Mator ontz Rom Dmm cnt Seo Connector L Board rr CN14 17 ad Freys a Not Used s3450 194 3 Remove 6 screws securing the Main Board to the Main Board Bracket 4 on the right side of the printer and 2 from the rear of the printer 8 18 Phaser 3425 Laser Printer Service Manual 4 Position the retainers on the parallel port connector straight out from the connector for removal Move the board toward the front of the printer so the connectors clear the bracket and remove the Main Board to the right 3450 016 Note NVRAM parameters are not transferable to the replacement board These parameters include Serial Number and copy count Serial Number can be reinstalled via CentreWare if the NIC Board is installed or via a downloadable PJL command Replacement Notes Note When reinstalling the Main Board the short machine screw goes in the top right corner of the board Main Drive Assembly PL 9 1 11 1 Remove the Right Cover Assembly page 8 7 2 Disconnect CN 14 connecting the Registration Clutch to the Connector Board see Map 2 Connector Board on page 10 4 3 Disconnect CN 1 from the Main Drive Assembly The cable connects to CN 11 on the Main Board see Print Engine Interconnect Diagram on page 10 2 4 Remove 1 screw securing the AC Terminal Cover to the Main Drive Assembly and remove the cover Service Parts Dis
97. s Communications du Canada NMB 003 Service Manual ix Declaration of Conformity Xerox Corporation declares under our sole responsibility that the printer to which this declaration relates is in conformity with the following standards and other normative documents In the European U nion Following the provisions of the Low Voltage Directive 73 23 EEC and its amendments EN 60950 Safety of Information Technology Equipment including Electrical IEC 950 Business Equipment Following the provisions of the Electromagnetic Compatibility Directive 89 336 EEC and its amendments EN55022 1998 CISPR 22 Limits and Methods of measurement of radio interference characteristics of Information Technology Equipment Class B EN61000 3 2 1995 A1 1998 A2 1998 IEC61000 3 2 Part 3 Limits Section 2 Limits for harmonic current emissions equipment input current less than or equal to 16A per phase EN61000 3 3 1995 IEC61000 3 3 Part 3 Limits Section 3 Limitation of voltage fluctuations and flicker in low voltage supply systems for equipment with rated current less than or equal to 16A EN55024 1998 CISPR 24 Information technology equipment Immunity characteristics Limits and methods of measurement CISPR 24 Immunity Phenomena Basic Standard Test Specification Electrostatic Discharge IEC61000 4 2 1995 6 kV Contact 10 kV Air Radio Freq
98. s Thin Card Stock 100 163 g m 26 60 Ib Cover Tray 1 Only Thick Card Stock 160 216 g m 59 80 Ib Cover Tray 1 Only Labels N A All Trays Letterhead 85 105 g m 22 28 Ib Bond All Trays Glossy Coated Paper 120 163 g m 81 110 Ib Tray 1 Only Business amp Greeting Card N A Tray 1 Only CD DVD Labels and Inserts N A Tray 1 Only Digital Photo Paper 120 163 g m 81 110 Ib Tray 1 Only Supported Envelopes Weight 20 24 Ib Bond No envelope Envelopes Commercial 10 4 12x9 5in feeder but Monarch Envelope 3 87 x 7 5 in up to 10 Commercial 9 5 25 x 7 25 in envelopes Custom may be fed DL Envelope 110 x 220 mm from Tray 1 C5 Envelope 162 x 229 mm Note Envelopes with hot melt type glue are not supported in this printer No window envelopes metal clasps or gummed labels Speciality Other sizes will be handled through Tray 1 with use of the custom Media size option Tray Universal Tray Tray 1 Capacity Standard Paper 500 Sheets 100 Sheets Transparency 100 Sheets 50 Sheets Envelopes N A 10 each 1 14 Phaser 3425 Laser Printer Service Manual Theory of Operation In this chapter Overview of the Phaser 3425 Laser Printer Print Modes Printer Controls Paper Path of the Printer Duplex Paper Path Chapter Overview of the Phaser 3425 Laser Printer Summary of the Printing Process The Phaser 3425 Laser Printer is a desktop monochrome laser printer applying the principals of an electrophotographic system
99. s Incorporated or its subsidiaries which may be registered in certain jurisdictions Apple LaserWriter LocalTalk Macintosh Mac OS AppleTalk TrueType2 Apple Chancery Chicago Geneva Monaco and New York are registered trademarks and QuickDraw isa trademark of Apple Computer Incorporated PCL and HP GL are registered trademarks of Hewlett Packard Corporation Windows and Windows NT are registered trademarks of Microsoft Corporation Novell N etWare NDPS NDS and Novell Directory Services are registered trademarks and PX and Novell Distributed Print Services are trademarks of Novell Incorporated Sun and Sun Microsystems are registered trademarks of Sun Microsystems Incorporated SPARC is a registered trademark of SPARC International Incorporated SPARCStation is a trademark of SPARC International Incorporated licensed exclusively to Sun Microsystems Incorporated UNIX is a registered trademark in the US and other countries licensed exclusively through X Open Company Limited This product uses code for SHA 1 written by John Halleck which is being used with his permission This product includes an implementation of LZW licensed under U S Patent 4 558 302 Other marks are trademarks or registered trademarks of the companies with which they are associated As an Energy Star partner Xerox Corporation has determined that this product meets the Energy Star guid
100. s at or just after the Registration Sensor Troubleshooting References Applicable Parts Wiring and Plug Jack Map References Registration Feed Sensor Actuator Transfer Roller Registration Assembly Print Cartridge Main Board Procedure Step Action and Questions Yes No 1 Is the Registration Feed Sensor Actuator Repair or Go to Step 2 damaged or binding replace the actuator and or sensor 2 Do the Registration Rollers turn freely Go to Step 3 Replace Registration Assembly 3 Does the Transfer Roller turn freely Go to Step 4 Replace the Transfer Roller 4 Inspect the paper transport area for Clear Go to Step 5 obstructions obstruction 5 Does the Print Cartridge drum bind or stall Replace Print Replace Main Cartridge Board General Troubleshooting 4 9 Jam At Top Jam 1 Paper jams in front of or just inside the Fuser Assembly Troubleshooting References Applicable Parts Wiring and Plug Jack Map References Exit Sensor Actuator Registration Sensor Actuator Fuser Assembly Power Supply Board Procedure Step Action and Questions Yes No 1 Is the Exit Sensor Actuator damaged or binding Repair or Go to Step 2 replace the actuator and or sensor 2 Is the Registration Sensor Actuator damaged or Repair or Go to Step 3 binding replace the actuator and or sensor 3 Is paper
101. s shown by below Remove the Pick Up Assembly from the printer 3450 072 8 34 Phaser 3425 Laser Printer Service Manual Tray 1 Pick Roller PL 9 3 2 4 1 Remove the Inner Front Cover page 8 12 2 Release the securing tabs and push both idle rollers outward from the sides of the Pick Roller as shown by below Note If it is necessary to rotate the Pick Roller for removal release the solenoid then rotate the shaft gear clockwise 3 Release the securing tab on the Pick Roller slide it to the right and then using a small flat screwdriver gently pry the Pick Roller free of the shaft as shown by below Housing 83450 073 Note After installation ensure that the Pick Roller does not rotate independently of the shaft If it does it is not properly installed Service Parts Disassembly 8 35 Tray 2 Retard Assembly PL 9 3 7 1 Remove the Front Inner Cover page 8 12 2 Remove 2 screws and drop the Retard Roller Frame Assembly 3450 074 Tray 2 Paper Pick Assembly PL 9 3 67 1 Remove the Front Inner Cover Assembly page 8 12 2 Remove the Main Drive Assembly page 8 19 8 36 Phaser 3425 Laser Printer Service Manual 3 On the right side of the printer press down the retaining tab and remove the Feed Roller Shaft Gear Assembly from the Feed Roller Shaft m N o D o a 6 37 Service Parts Disassembly 4 Turn the printer upside down remove 4 screws and remove the
102. ser 3425 Laser Printer Service Manual General Troubleshooting In this chapter Introduction Preliminary Procedures Front Panel Troubleshooting Paper Size Switch Assembly Power Supply Troubleshooting Media Jams and the Paper Path Chapter Introduction This chapter covers the general start up Power On Self Test and power supply operations of the printer to aid in troubleshooting problems not associated with an error code or front panel error message For troubleshooting problems associated with an error code or front panel error message notes on how to use the troubleshooting procedure tables and how to use service diagnostics see Chapter 3 Error Messages and Codes on page 3 1 Troubleshooting procedures will isolate a problem to a specific component or subassembly in some cases including the wiring harness Preliminary Procedures 1 Is the AC power provided at the wall outlet within specifications for this printer either 110 VAC or 220 VAC 2 Is the AC power cord in good condition not frayed or broken 3 Is one end of the AC power cord connected to the printer 4 Is the other end of the AC power cord plugged into a grounded three pronged AC wall outlet 5 Is the printer located in an area where the temperature and humidity are moderate and stable as recommended in the General Information section 6 Is the printer located in an area that is free of dust 7 Is the printer located away from water o
103. sfer Roller Caution The gear on the end of the Transfer Roller shaft is not secured in place Hold the gear when removing the roller to prevent it from falling into the printer Note The 2 bearing clips are not interchangeable The clip with the ground contact goes on the gear side of the Transfer Roller 5 Slide the roller slightly to the right so the end of the shaft clears the lip on the printer case and lift the Transfer Roller together with the Bearing Clips and the Transfer Roller Gear out of the printer Le s3450 002 1 Transfer Roller 2 Bearing Clip Fuser Removal PL 9 3 40 Warning The Fuser may be hot Turn off power and allow at least 5 minutes for the Fuser to cool before removal 1 Power down the printer and remove the power cord from the wall outlet 2 Remove the rear cover page 8 14 Service Parts Disassembly 8 5 3 Using the included screwdriver remove the 4 screws securing the Fuser to the printer chassis 4 Pull back on both ends of the Fuser to remove it Note The Fuser 1 is secured using two different size screws When reinstalling the long screws go on the top and the short screws go on the bottom 3450 043 Reassembly Caution When reinstalling the Fuser insert it gently and be careful not to force the gears Make sure that the Fuser is firmly seated on both ends and that the ground wire lower LEFT end is not trapped under Fuser The long screws go on top and the
104. short screws go on the bottom Failure to reconnect the ground wire can result in a premature printer failure If the Fuser is not fully seated the fins on the inside of the rear cover will hit the Fuser when the cover is closed 8 6 Phaser 3425 Laser Printer Service Manual Print Engine Disassembly Right Cover Assembly PL 9 2 2 1 Power down the printer and remove the power cord from the wall outlet 2 Remove the 2 screws securing the Right Cover 1 to the back of the printer ao 1 53450 012 3 Slide the cover toward the back of the printer to disengage the 3 retaining hooks on the lower edge of the cover then lean the top of the cover outward and remove it from the printer Service Parts Disassembly 8 7 Left Cover Assembly PL 9 2 4 1 Power down the printer and remove the power cord from the wall outlet 2 Remove the 2 screws securing the Left Cover to the back of the printer You will need to open the rear cover to access the upper screw 3450 027 Note The rear cover will have to be closed most of the way when sliding the left hand cover assembly to the rear so the cover will clear the bottom lip of the rear cover The rear cover will then have to be opened slightly to clear the retaining boss for the upper screw 3 Slide the cover toward the back of the printer to disengage the 3 retaining hooks on the lower edge of the cover then lean the top of the cover
105. sitive latent image The toner forms a visible image on the drum surface Pre Clean The pre transfer lamp exposes the developed suface of the drum lowering the surface potential and thereby providing enhanced transfer efficiency Transfer The finished toner image on the drum is transferred onto the print media using the voltage supplied by the transfer roller The conductive transfer roller receives a high positive voltage approximately 1000 VDC from the HVPS that puts it at a higher potential than the drum Since the transfer roller is located behind the print media the toner image is attracted to the high potential and deposits on the surface of the print media Fixing The finished toner image is impermanent and easily smeared To fix the image the print media goes through the Fuser where it passes between a pressure roller and the heat roller The toner is fused onto the print media by the combination of heat and pressure The heat roller is heated by a Halogen lamp The roller surface temperature is detected by a Thermistor The information is fed back to the lamp control to maintain a surface temperature of 185 C during printing and 145 C during standby If the thermistor detects a Fuser overheat condition it disconnects AC power to the Fuser Cleaning After the image is transferred to the print media a cleaning blade inside the cartridge removes any remaining toner particles from the drum Phaser 3425 Laser
106. ssembly from the printer until you first disconnect all 5 connectors 3450 179 Service Parts Disassembly 8 43 4 Disconnect 5 connectors CN 1 CN 2 CN 3 CN 4 and CN 101 from the Power Supply Board then remove the Power Supply Board Assembly to a work surface with the Power Supply up 3450 089 Reassembly Notes Note CN3 must be dressed correctly for reassembly If CN3 is pulled too far forward assembly will be difficult 8 44 Phaser 3425 Laser Printer Service Manual Duplex Assembly PL 8 8 2 1 Remove the Power Supply Board page 8 42 2 Remove 4 screws securing the Power Supply Board to the Duplex Assembly and remove the board 3450 090 1 Power Supply Board 2 RH Guide Duplex 3 LH Guide Duplex Exit Sensor PL 9 3 62 1 Remove the Power Supply Board page 8 42 2 Remove 2 screws securing the Exit Sensor to the chassis and remove the Exit Sensor Service Parts Disassembly 8 45 8 46 Phaser 3425 Laser Printer Service Manual Parts Lists In this chapter m Using the Parts List m Print Engine Parts Xerox Supplies Chapter Q Using the Parts List No The callout number from the exploded part diagram 2 Part Number The material part number used to order specific parts 3 Qty This number represents the parts per printer not the number of parts supplied in the actual part order 4 Name Description Details
107. t Prints displays Use the arrow buttons to scroll through the menu until Fuser Clean displays Press OK The printer will enter the cleaning mode and print out a Fuser cleaning page Repeat steps 2 through 6 but scroll until Print Cart Clean displays to clean the print cartridge Cleaning and Maintenance 7 3 Phaser 3425 Laser Printer Service Manual Service Parts Disassembly In this chapter m Overview m General Notes on Disassembly m Removing Service Parts and Consumables m Print Engine Disassembly Chapter H Overview This section contains the removal and replacement procedures for selected parts of the printer according to the Service Parts List Not all Replacement Procedures are included in this Service Manual In most cases to reinstall a part simply reverse the Removal Procedure shown In some instances the Replacement Procedure is included because it may contain special steps For specific assemblies and parts refer to the Parts Lists on page 9 1 Standard Orientation of the Printer When needed the orientation of the printer is called out in the procedure for locating printer parts Refer to the printer orientation graphic for locating the right left front and back sides of the printer Left Front 3450 154 8 2 Phaser 3425 Laser Printer Service Manual General Notes on Disassembly Preparation Before you begin any Removal and Replacement Procedure 1 Switch OFF the printer p
108. t may be difficult or impossible to read on the average multi meter When a troubleshooting procedure instructs you to replace a non spared component and that component is part of a parent assembly you should replace the entire parent assembly Phaser 3425 Laser Printer Service Manual Voltage Measurements 1 Power and signal grounds are connected to the frame ground All circuit troubleshooting can be performed using the metal frame chassis as the grounding point To locate connectors or test points refer to Wiring Diagrams on page 10 1 for more information Unless otherwise specified the following voltage tolerances are used within this section Stated Measured 3 3 VDC 3 135 to 3 465 VDC 5 0 VDC 4 75 to 5 25 VDC 24 0 VDC 21 6 to 26 4 VDC 0 0 VDC Less than 0 5 VDC Error Messages and Codes 3 7 Service Diagnostics The Phaser 3425 Laser Printer has built in diagnostics to aid in troubleshooting problems with the printer The Service Diagnostics Menu provides a means to test sensors motors switches clutches fans and solenoids Diagnostics also contain built in test prints cleaning procedures printer status and some NVRAM access Service diagnostics are to be executed through the front panel by a certified service technician only The printer must be rebooted to enter Service Diagnostics Entering Service Diagnostics 1 Turn the printer power OFF 2 Hold down the OK button and turn
109. tab that secures the Transport Roller Shaft Assembly gear to the shaft and remove the gear 11 Repeat the procedure for the bearing on the right end of the Transport Roller Shaft Assembly and remove the shaft 12 Slide the bearings off both ends of the Transport Roller Shaft Assembly Note The bearings can be left in place on the shaft unless they or the shaft are being replaced Note On reassembly ensure that the Output Full Sensor actuator moves freely Laser Assembly PL 9 1 16 1 Remove the Print Cartridge page 8 4 and protect it from light 2 Remove the Top Cover Assembly page 8 9 Service Parts Disassembly 8 27 3 Using a small flat bladed screwdriver release the latch hook on each side of the Intermediate Output Tray 53450 057 4 Remove the Intermediate Output Tray item 1 towards the front of the printer 53450 058 5 Remove 3 screws securing the Laser Assembly to the printer chassis and lift the Laser sufficiently to access the harness Caution Be careful not to touch the window on the underside of the Laser Assembly 6 Carefully peel back the foam pad securing the laser harness to the bottom of the Laser Assembly and disconnect the 2 harness connectors from the Laser Note If the foam pad is damaged during removal it is not critical to unit performance 8 28 Phaser 3425 Laser Printer Service Manual Print Cartridge Interconnect Assembly PL 9 3 53 1 Remove the Laser Assembly
110. tern using either the Print Simplex or Duplex print routine The Location displayed location should be checked for normal operation during print The location order for normal print routines is listed below 1 Simplex 1 999 Press UP DOWN OK a 1 Page Laser Start gt Pick Up gt Reg Sensor On gt Exit Sensor On gt End b More Than 1 Page Laser Start gt Pick Up gt Reg Sensor On gt Pick Up gt Reg Sensor On gt gt Exit Sensor On gt End 2 Duplex 1 999 Press UP DOWN OK a 1 Page Laser Start gt Pick Up gt Reg Sensor On gt Exit Sensor On gt Duplex Sensor On gt Reg Sensor On gt Exit Sensor On gt End b More Than 1 Page Laser Start gt Pick Up gt Reg Sensor On gt Exit Sensor On gt Duplex Sensor On gt Reg Sensor On gt Pick Up gt Reg Sensor On gt gt Exit Sensor On gt End Error Messages and Codes 3 9 Function Function Function Description Display Motor Fan Main Motor Main drive motor runs after OK Main Motor button is pressed and stops when ON OFF the Cancel button is pressed Laser Motor Laser motor runs after OK button is Laser Motor pressed and stops when the Cancel ON OFF button is pressed Exit Exit motor runs in forward direction Exit Forward when OK button is pressed and Forward stops when Cancel is pressed ON OFF Exit Exit motor runs in reverse when OK Exit Backwa
111. ters related to forming both the electrostatic and toner image must be continuously monitored and adjusted by the printer Parameter correction and control over the entire printing process is called process control In the Phaser 3425 Laser Printer the process is controlled by using feedback circuits to monitor changes in the printing environment for each section i e charging development transfer fixing etc and adjusting the appropriate supply voltages to achieve optimum printing results Toner Control Print Cartridge installation and Toner Level are detected by the Print Cartridge Interconnect Board and the associated signals are supplied to the Main Board The CRUM not only detects cartridge presence it also determines whether it is a genuine Xerox cartridge When the toner remaining falls to 15 the printer displays a low toner message on the front panel display Fuser Control Fuser temperature control During fuser temperature control the printer s target temperature is set The heat roller surface temperature is controlled to match the target temperature by turning the heater lamp on off The heat roller surface temperature is detected by a Thermistor If the Thermistor shows that the temperature is higher than the target the heater lamp is turned off If the detection result is low the heater lamp is turned on The Fuser Control circuit keeps the Fuser temperature at 185 C during printing and at 145 C during stand
112. the printer back ON 3 Continue to hold the button until the following mesage is displayed on the front panel Diagnostic Mode Press Menu Key and then release the OK button 4 Press the Menu button and use the Arrow buttons to scroll through the available functions see the following Button Functions and Menu Map 3 8 Phaser 3425 Laser Printer Service Manual Service Diagnostic Front Panel Button Descriptions Button Function BACK Returns to the prior higher level menu structure if available If help text is displayed on the front panel pressing BACK will restore the current menu item and remove the help text CANCEL Terminates the current test Cancels current INFO display MENU Cycles through all of the top level menu items UP Scrolls up one menu item within a menu list This control does not wrap Used to increment data in tests requiring user input DOWN Scrolls down one menu item within a menu list This control does not wrap the end of a menu list is designated by three asterisks Used to decrement data in tests requiring user input OK Enters the highlighted menu Executes the current test item Used to select a data value entered by the user Service Diagnostics Menu Map Function Function Function Description Display Tray 3 Selects and checks Tray 3 interface Tray 3 Interface Interface PASS FAIL Test Pattern Pressing OK implements printing Pattern the test pat
113. uency Electromagnetic Field radiated IEC61000 4 3 1995 80 1000 MHz 3 V m 80 AM 1 KHz Fast Burst Transients IEC61000 4 4 1995 5 50 Tr Th ns 5 kHz Rep Freq 0 5 kV on Signal Lines 1 KV on AC Mains Line Surge IEC61000 4 5 1995 Combination wave 2 0 kV Common mode 2 0 kV Differential mode Radio Frequency Electromagnetic Field Conducted IEC61000 4 6 1996 0 15 80 MHz 3 V 80 AM 1 kHz Phaser 3425 Laser Printer CISPR 24 Immunity Phenomena Basic Standard Test Specification Line voltage dips IEC61000 4 11 1994 gt 95 dip for 72 cycle 50 Hz 30 dip for 25 cycles 50 Hz Line voltage drop out IEC61000 4 11 1994 59596 dropout for 250 cycles 50 Hz This product if used properly in accordance with the user s instructions is neither dangerous for the consumer nor for the environment A signed copy of the Declaration of Conformity for this product can be obtained from Xerox Service Manual xi xii Phaser 3425 Laser Printer Contents Service Terms jii Symbols Marked on the Product iv Power Safety Precautions V Electrostatic Discharge ESD Precautions vi Service Safety Summary vii Regulatory Specifications ix 1 General Information Printer Introductio
114. utlets steamers electric heaters volatile gases or open flames 8 Is the printer shielded from the direct rays of the sun 9 Does the printer have the correct ventilation space around all sides as recommended in the Physical Dimensions and Clearances on page 1 11 10 Is the printer sitting on a level and stable surface 11 Is the paper stock used in the printer as recommended in the Media and Tray Specifications on page 1 14 12 Does the customer use the printer as instructed in the User Guide 13 Are consumables replaced at the intervals recommended in Consumables on page 1 9 14 Is the Print Cartridge properly installed 15 Are all of the printer assemblies in place and are all printer covers and doors firmly closed 4 2 Phaser 3425 Laser Printer Service Manual Front Panel Troubleshooting No Front Panel Display after Power is Turned ON 1 oa BB WO M Verify that power cord is securely plugged into both the printer and the grounded three prong AC outlet with the appropriate power available Ensure that all covers are securely closed Verify that Top Cover Print Cartridge and Fuser Gate interlocks are functional Replace the Power Supply Board Replace the Main Board Replace the Front Panel Front Panel LED is On Front Panel Display is Blank a bb OWN Remove and reseat all connections to the Main Board Remove and reseat the Front Panel connector Replace the Front
115. wrapped around the Fuser rollers or Remove paper Go to Step 4 blocking Fuser exit and clean Fuser rollers 4 Is Fuser operational the Fuser Rollers turn freely when the motor is on Go to Step 5 Replace Fuser Assembly 5 Use the embedded diagnostics to check the Fuser Exit Sensor Is the sensor operational Replace Power Supply Board Replace Fuser Exit Sensor 4 10 Phaser 3425 Laser Printer Service Manual Jam At Exit Jam 2 Paper jams in the Fuser Assembly outlet or the Exit Roller Assembly Troubleshooting References Applicable Parts Wiring and Plug Jack Map References Exit Sensor Actuator Fuser Assembly Exit Transport Assembly Main Board Procedure Step Action and Questions Yes No 1 Is the Exit Sensor Actuator damaged or binding Repair or Go to Step 2 replace the actuator and or sensor 2 Inspect the Exit Roller Assembly Is it damaged Replace the Exit Go to Step 3 or binding Roller Assembly 3 Inspect the Fuser Is any paper wrapped around Remove Go to Step 4 the Fuser rollers obstruction and clean Fuser rollers 4 Is the Fuser Assembly operational rotates when Go to Step 5 Replace the the Fuser motor is on Fuser Assembly 5 Use the embedded diagnostics to check the Replace Main Replace Fuser Fuser Exit Sensor Is the sensor operational Board Exit Sensor General Troubleshooting
116. ys 3 10 Phaser 3425 Laser Printer Service Manual Function Function Function Description Display Sensor Paper Size Compares selected media size with Paper size Sensor size actually loaded If Tray 3 is Letter installed both Tray 2 and Tray 3 sizes will display Tray 1 NP With tray down touch sensor and Tray 1 W Sensor confirm message changes to Tray 1 Out Paper With Paper Tray 2 NP With tray extended touch sensor Tray 2 W Sensor and confirm message changes to Out Paper Tray 2 With Paper Tray 3 NP With tray extended touch sensor Tray 3 W Sensor and confirm message changes to Out Paper Tray 3 With Paper Duplex Remove Tray 2 pull down on duplex Duplex Sensor jam gate actuate the sensor and Sensor Off confirm that message changes to Duplex Sensor On Cover Open With cover open touch sensor and Cover Open Sensor confirm message changes to Cover Closed Reg With cover open and print cartridge Reg Sensor out touch sensor confirm message Sensor W changes to Reg Sensor With Out Paper Paper Exit Sensor With back cover open push a sheet Exit Sensor of paper into exit path and confirm W Out message changes to Exit Sensor Paper With Paper Output Full Touch sensor in output bin and Output Bin Sensor verify that message changes to Not Full Output Bin Full Error Messages and Codes 3 1 Function Functio

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