TAG 030 Developer Bias Short/Failure | HP C30 instruction

TAG 030: Developer Bias Short/Failure

Error Code:

030

Possible Defects: Cleaner unit

High voltage unit

DC power supply

Connectors or wiring

PCL board

Printhead assembly

Power control #2 board

Developer unit

1 Turn the printer off and unplug the power cord.

•Verify that J/P23, J/P24, J/P40, J/P41, J/P96, and J/P85 are connected properly.

•Power-on-reset the printer.

Is error code 030 still displayed?

No: A loose connector was at fault. Turn to TAG 002: Check & Problem Resolution.

Yes: Continue.

2 Check the voltages, as described in Chapter 9, “General Printer Maintenance” .

Are the voltages correct?

No: Replace the high voltage power supply unit, then turn to TAG 002: Check & Problem Resolution.

Yes: Continue.

3 Has the developer unit been replaced recently?

No: Go to #5 in this TAG.

Yes: Continue.

4 Replace the cleaner unit.

•Run test prints.

Is error code 030 still displayed?

No: The cleaner unit was defective; turn to TAG 002: Check & Problem Resolution.

Yes: Reinstall the original cleaner unit and go to #6 in this TAG.

5 Replace the developer unit.

•Install a new toner cartridge.

•Run test prints.

Is error code 030 still displayed?

No: The developer unit was defective; turn to TAG 002: Check & Problem Resolution.

Yes: Reinstall the original developer unit and continue.

3-44	Troubleshooting Analysis Guide (TAGs)

Image 96

HP C30 manual TAG 030 Developer Bias Short/Failure, Is error code 030 still displayed?, Are the voltages correct?

Contents

Cut Sheet Printers Maintenance Manual Models C30 and C30D Printing History Trademarks Conventions Using This Manual Preface Other Manuals Page Contents Viii Diagnostic Tests Print Quality Samples Wiring Diagrams and Electrical Data Removal/Replacement Procedures Xii General Printer Maintenance Options Every-Call Cleaning Procedure Abbreviations and Acronyms Printer Troubleshooting Overview Printing and Troubleshooting Overview Theory of Operation Receiving data Host Paper Path and Cycle Sequence Simplex PrintingDuplex Printing Paper Path Error Code Technical Definitions Error Code Technical Definitions Type DescriptionPath Paper OPC Fuser Assembly Controller Errors Sensor and Switch Locations Top view Front view Developer right view Developer left view Right side view Top left, duplex tray view Front view Sensor and Switch List Sensor/Switch Name Troubleshooting Overview General Troubleshooting Tips Problem Printer or Host? Reading the Error Log Protocol Converters Confirming Line Power Using the Troubleshooting Analysis Guide TAG TAG 001 Troubleshooting a ProblemSample TAG Did only the Ready light come on with no numeric display? Options reviews printer options HCI, HCO information Standard Procedures Power-on-reset PORChecking Continuity Installing the Interlock By-pass Tool Producing a Developed ImageProducing a Toner Patch Completing a Service Call Producing a Toner Patch on the Photoconductor Unit Clearing the Error Log Drive Indication Display TAG Cross- Reference Tables TAG Cross-Reference Tables Error Code/TAG Cross-Reference Printer Error Codes Printer Error Code Meaning Go to TAG PCL Error Codes PCL Error Code Meaning Go to TAG PCL Error Codes PCL Error Code Meaning Go to TAG IGS Firmware Error Codes IGS Firmware Error Code Meaning PCL Failure Error CodesIGS Software Error Codes Code TAG Cross- Reference Tables TAG Cross- Reference Tables Print Quality/TAG Cross-Reference 11. Blank Print TAGs Blank Prints Go to TAG 12. Light Print TAGs Light Prints Go to TAG 13. Dark Print TAGs Dark Prints Go to TAG14. Skewed Path TAGs 15. Misregistration TAGs Misregistered Prints Go to TAG Print Quality/TAG Cross-Reference 18. Operator Panel Problems TAGs Go to TAG 19. Output Tray Problem TAGs Output Tray Problems Go to TAG20. Cassette Problem TAGs Cassette Problems Go to TAG Mechanical Malfunction/TAG Cross-Reference 22. Counter Problem TAGs Counter Problems Go to TAG Print Quality/TAG Cross-Reference Troubleshooting Analysis Guide TAGs Troubleshooting Analysis Guide TAGs Troubleshooting Analysis Guide TAGs Troubleshooting Analysis Guide TAGs TAG 001 Troubleshooting a Problem Did the power-on-reset end with an error code? Did an error code appear while running the prints? Did an error code appear while running test prints?Does an error code appear? Display? Can you identify the problem? TAG 002 Check & Problem Resolution Fuser unit may be hot Handle gently to avoid breaking the charger wire Have you completed the every-call cleaning procedure? Are the test prints clean and printing correctly? Display Indication Do the error log entries appear as 0000? If 7-0 appears, press Stop immediately. do not Proceed Is error code 010 displayed? TAG 010 Upper Cassette MalfunctionIs it in good working order? Does the voltage change from 0 Vdc to +12Vdc? Troubleshooting Analysis Guide TAGs Is error code E10 displayed? E10 Envelope Tray Out of EnvelopesDoes 1-8 appear on the operator panel? Does the voltage change from 0Vdc to +12Vdc? Troubleshooting Analysis Guide TAGs Is error code 011 displayed? TAG 011 Lower Cassette Malfunction Troubleshooting Analysis Guide TAGs TAG 012 Upper Cassette Not Latched Is the upper cassette properly latched?Are any of these parts damaged? Is 1-0 displayed? Is a value other than 1-0 displayed?Is there continuity? Is there continuity? TAG E12 Envelope Tray or Feeder Not Latched Is 1-0 displayed? Is there continuity? TAG 013 Lower Cassette Not Latched Is the lower cassette properly latched? Install the lower cassette Is error code 020 still displayed? TAG 020 Paper Jam/Misfeed in Upper Cassette AreaAre all the parts in good working order? Is error code 021 displayed? Does the voltage change from 0 Vdc to +12 Vdc?Is the voltage +24 Vdc? Is there continuity on all? Does the voltage change from +24 Vdc to 0 Vdc? Is there continuity? TAG 021 Paper Jam/Misfeed in /Lower Cassette Area Is error code 020 displayed? Then turn to TAG 002 Check & Problem Resolution Is there ground? Is there continuity? TAG 022 Paper Jam in the Transfer or Fuser Area Is paper wrapped around the heat roller? Is error code 022 still displayed? Has the problem been resolved?Does the multiple feed problem still exist? Has the fuser unit been replaced recently? Does the paper timing roller shaft turn? Is there continuity on both? Are they damaged or contaminated with toner? Are these parts in good working order?Is there improper registration? Are the parts in good working order? Does the vacuum transport unit fan hold the paper in place? Is the voltage 100 Vac? Is error code 023 displayed? TAG 023 Paper Jam in the Output AreaIs paper stopped or jammed at the output tray? Are they in good working order? Is error code 025 displayed? Is error code 025 still displayed?TAG 025 Paper in Input Area Before Printing Is the voltage +12 Vdc? Then turn to TAG 002 Check & Problem Resolution Is error code 026 displayed? TAG 026 Paper in Output Area Before Printing Is error code 030 still displayed? TAG 030 Developer Bias Short/FailureAre the voltages correct? Has the developer unit been replaced recently? Is the voltage +24 Vdc? Check TP3-27 for +24 Vdc TAG 031 Toner Patch Reference Level Too Low Is there continuity? TAG 032 Toner Patch Too Light Have the photoconductor unit been replaced recently?Is the toner patch developed and properly positioned? Are all connectors and wiring connected properly? Do the prints appear light or blank? TAG 035 Out of Toner or ADD Toner Indicator On Is error code 035 displayed?Has the photoconductor unit been replaced recently? Has the seal has been removed from the toner cartridge? Is there continuity? TAG 036 Developer Unit Not Installed Is error code 036 displayed? Is error code 040, 041, or 042 still displayed? TAG 040 Photoconductor Seam Sensor MalfunctionDoes the photoconductor belt rotate? Is it in good working order? Yes Go to TAG 002 Check & Problem Resolution Is the voltage between +2 to +6 Vdc? Figure a 12V Is error code 044 displayed? TAG 044 Main Charger/Transfer Charger Circuit OpenHas the main charger been replaced recently? Is paper jammed inside the transfer charger housing? Is error code 046 displayed?Is error code 051 displayed? Is error code 050 displayed? Continuity Is error code 045 displayed? Is error code 045 still displayed?TAG 045 Main Charger Circuit Shorted Is there continuity? TAG 050 Transfer Charger Circuit Shorted Is there continuity to ground? Has the problem been resolved? Is error code 055 displayed? TAG 055 Erase Lamp MalfunctionIs the value displayed less than 220? Did you measure +12 Vdc? Is there continuity? Is error code 070 or 073 displayed? TAG 070 Fuser Unit Malfunction Does the fuser lamp light? Is the voltage approximately +5 Vdc? Is the resistance between I KΩ and 400 KΩ? Is the voltage at least 100 Vac? Was the voltage at least 100 Vac? Is the resistance approximately 550KΩ? Is error code 071 displayed during power-on-reset? TAG 071 Open Fuser ThermistorIs there continuity to ground on either? TAG 072 Fuser Unit Temperature Too High Does the lamp turn on before error code 072 is displayed? Is the resistance at least 1K‡WW? Is there resistance? TAG 083 Job Offset Mechanism Malfunction Does the output tray jog continuously?Does the output tray move back and forth? Is the voltage +12 Vdc? Is the voltage +12 Vdc? Is error code 083 displayed? Does the error code change from 081 to 082?Does the error code change from 082 to 081? TAG 097 +12 Vdc Power Shorted or Sensing Problem Does the printer have an attachment option? Is the voltage +12 Vdc? No Go to #19 in this TAG Yes Continue Is the voltage +12 Vdc? Is there continuity to ground at either? Is there continuity at either? No Go to #39 in this TAG Yes Continue Is the voltage +12 Vdc? Is the voltage at +12 Vdc? Then turn to TAG 002 Check & Problem Resolution TAG 098 -12 Vdc Power Shorted Is the voltage -12 Vdc? Is the voltage at J/P8-8 -12 Vdc? TAG 099 +24 Vdc Power Shorted Is the voltage +24 Vdc? No Go to #21 in this TAG Yes Continue Is the voltage +24 Vdc? Is the voltage +24 Vdc? No Go to #26 in this TAG Yes Continue No Continue Yes Go to #31 in this TAG Is there continuity? 100 Troubleshooting Analysis Guide TAGs Troubleshooting Analysis Guide TAGs 101 Was an error code displayed during the power-on-reset? TAG 100 PCL Board Interface Malfunction TAG 101 IGS Controller Diagnostic Failure Is error 101 displayed on the operator panel Is error code 451 displayed? Is error code 451 still displayed?TAG 130 Diskette/Disk Drive Malfunction Is error code 572 displayed? Is error code 573 displayed?Is the voltage +5 Vdc? Is error code 574 displayed? Is error code 575 displayed?Is error code 576 displayed? Is there continuity on any? Is error code 130, 131, 133, or 134 displayed? Is there continuity to ground on any?Can the printer run test prints? Was an error code displayed? TAG 200 IGS Internal Communication MalfunctionDoes this printer contain a hard drive? Troubleshooting Analysis Guide TAGs 109 Is error code 201 displayed? Is error code 121 or 123 displayed?Are the connectors or wiring damaged? TAG 201 IGS-PCL Interface Malfunction Replace the IGS board Power-on-reset the printer TAG 405 IGS Bit-Map RAM Malfunction 606, 600 TAG 500 +5 Vdc Power Malfunction Is the operator panel still blank? Check J/P42-1 for +5 Vdc Troubleshooting Analysis Guide TAGs 115 No Go to #20 in this TAG Yes Continue Troubleshooting Analysis Guide TAGs 117 TAG 600 AC Power Malfunction Is the voltage +100 Vac? Are the interlock switch actuators working properly? Was the power-on-reset successful?Does the fuse have continuity? Does the front cover interlock switch have continuity? Troubleshooting Analysis Guide TAGs 121 122 Troubleshooting Analysis Guide TAGs Close the top cover Check P4-5 for continuity to ground 124 Troubleshooting Analysis Guide TAGs TAG 610 Operator Panel Malfunction Do the status lights stay on continuously?Did you hear the tone after pressing each function key? Is one of the function keys not working properly? 126 Troubleshooting Analysis Guide TAGs Is there an open or short to ground continuity? Wiring Table CLR Paper light may be very dim Is a high capacity output unit installed on the printer? TAG 700 Output Tray Circuit MalfunctionDoes Output Tray Full come on too soon? Is the output tray full sensor in good working order? TAG 702 Paper Size Detection Malfunction Does the display still indicate the incorrect paper size?Is the paper size sensing mechanism in good working order? Is the circuit board or mounting damaged or contaminated? Is there a wiring problem? Is the circuit board or mounting contaminated or damaged? Wiring for the Upper Paper Size Sensor Wiring for the Lower Paper Size SensorWiring for the Lower Paper Size Sensor TAG 703 Upper Cassette Malfunction Is the upper cassette in good working order?Are all parts in good working order? TAG 704 Lower Cassette Malfunction Is the lower cassette in good working order? TAG 705 Multiple Paper Feeding Paper cassette TAG 706 Paper Damaged or Wrinkled Are the prints wrinkled or damaged?Is the print on the paper skewed? Is either part damaged, worn, or contaminated? TAG 707 Upper Paper Guide Assembly Not Closing Did the upper paper guide lock into place? TAG 750 Counter Malfunction Is the counter functioning properly? Troubleshooting Analysis Guide TAGs 141 TAG 751 Main Drive Motor Runs Continuously TAG 753 External Communications Malfunction Did the diagnostic test run properly? Is there a problem with the connectors or pins? Does the problem appear while using RS-232C communications? RTS TAG 754 Attachment Option Malfunction Are all voltages correct? TAG 800 Prints Blank or With Dark Horizontal Bands Prints With Light Horizontal Bands Is a developed image on the photoconductor? Do the LEDs illuminate? Are the prints blank without dark bands?Is the coupling damaged? Does the magnetic brush turn? Troubleshooting Analysis Guide TAGs 151 TAG 801 Prints Light or Light With Carrier Particles Are they jagged? Is the developed image on the photoconductor correct? Does the coupling turn? Do both drive couplings rotate freely? Does the voltage change to 0 Vdc? Is a meter with a high voltage probe available?Is the voltage correct? Is the voltage 0 Vdc? Troubleshooting Analysis Guide TAGs 157 TAG 802 Prints With Voids or White Spots Replace the fuser unit Run test prints TAG 803 Prints With Light or White Vertical Streaks Are there vertical streaks on the photoconductor belt image? TAG 804 Prints With Light Horizontal Bands TAG 805 Black Prints Is the photoconductor belt covered with toner? Replace the high voltage unit Run test prints Replace the IGS board Run test prints Cleaner unit TAG 806 Prints with Dark Spots or Scratches Does the paper have any problems? Are these mechanisms in good working order? Is the problem with the upper cassette? TAG 807 Misregistered/Skewed Prints Simplex Is the problem also with the lower cassette? Are these parts clean and in good working order?Is the problem with the lower cassette? Is misregistration the symptom of the problem? Did resetting the switches resolve the problem?PCL Board Switch Settings DIP Switches Number Troubleshooting Analysis Guide TAGs 171 TAG 808 Prints Overtoned/Dark Vertical Streaks Does the coupling turn continuously? Is there continuity at each? Is it connected properly? Troubleshooting Analysis Guide TAGs 175 Repair or replace the PCL board Run test prints TAG 809 Blurred or Smeared Vertical Streaks on Prints Does the vacuum fan hold the paper? Is the vacuum transport unit in good working order? Troubleshooting Analysis Guide TAGs 179 TAG 810 Uneven Density or Dark Areas on Prints Troubleshooting Analysis Guide TAGs 181 TAG 811 Background/Residual Images/Dark Prints Are all the erase lamps on? 184 Troubleshooting Analysis Guide TAGs Are any of the values out of specification? Is the voltage 0.5 Vdc? 186 Troubleshooting Analysis Guide TAGs TAG 812 Uneven or No Fusing on Prints Connectors or wiring AC power supply unit PCL board Is the paper within specification? Does the lamp light within 1.5 minutes? TAG 813 Residual Images on Prints Is the belt attached? 190 Troubleshooting Analysis Guide TAGs TAG 815 Prints Resulting From Printhead Malfunctions Is error code 090 displayed? TAG 900 Top Cover Interlock Malfunction, Duplex Troubleshooting Analysis Guide TAGs 193 TAG 901 Misregistration/Skewed Prints Duplex Did the test indicate an error code? 196 Troubleshooting Analysis Guide TAGs Troubleshooting Analysis Guide TAGs 197 TAG 902 Paper Jam in Duplex Area Is the duplex paper path sensor in good working order? Is the a roller clutch in good working order? Is the input solenoid in good working order? Is the C roller solenoid in good working order? Is the feed motor in good working order? Turn the printer on Check J/P306-3 to J/P306-4 for +5 Vdc Print Quality Samples Print Quality Samples Print Quality Samples Sample 1 Good Quality Print Good Quality Print Sample 2 Washout Washout Sample 3 Blank Print Blank Print Sample 4 Light Print Light Print Sample 5 Light Print With Background Light Print With Background Sample 6 Voids or White Spots Voids of White Spots Sample 7 Light Vertical Streaks Light Vertical Streaks Sample 8 Blank Vertical Bands Blank Vertical Bands Sample 9 Light Horizontal Bands Light Horizontal Bands Sample 10 Black or Dark Print 10.Black or Dark Print Sample 11 Dark Specks, Lines, or Areas 11.Dark Specks, Lines, or Areas Sample 12 Dark Vertical Lines 12.Dark Vertical Lines Sample 13 Skewed Prints 13. Skewed prints Sample 14 Misregistration 14.Misregistration Sample 15 Overtoned Print 15.Overtoned Print Sample 16 Blurred Images or Characters 16.Blurred Images or Characters Sample 17 Varying Print Density 17.Varying Print Density Sample 18 Background 18. Background Sample 19 Residual Images 19.Residual Images Sample 20 Wrinkles 20. Wrinkles Sample 21 Fusing Problems 21.Fusing Problems Diagnostic Tests 001 Diagnostic Tests How to Run Diagnostics Operator Panel Test Upper Cassette TestPaper Size Codes Display Indication Lower Cassette Test Intentionally excluded Sensor Test Sequence Sensor Test Displays Sensor Description Paper Transport Clutch Test Sequence Counter TestClutch Test Displays Indication Jogging Motor Test Error Displays Indication Jogging Motor TestPhotoconductor Test Toner Supply Motor Test Error Displays Indication Toner Supply Motor Test Main Charger Test Error Displays Indication Main Charger TestMain Charger Test Displays Indication 10. Transfer Charger Test Error Displays Indication Transfer Charger TestTransfer Charger Test Displays Indication 11. Erase Lamp Test Error Displays Indication Erase Lamp Test 13. Negative Developer Bias Test Error Displays Indication Negative Developer Bias Test12. Negative Developer Bias Test Displays Indication 15. Duplex Motor Feed Test Error Displays Indication Duplex Feed Motor Test14. Duplex Motor Feed Test Displays Indication 17. Duplex Input Sensor Test Error Displays Indication Duplex Input Sensor Test Sequence16. Duplex Input Sensor Test Displays Sensor Description 19. Duplex Clutch Test Error Displays Indication Duplex Clutch Test Sequence18. Duplex Clutch Test Displays Indication Duplex Tray Paper-Guide Motor Test High-Capacity Output Unit Test High-Capacity Input Unit Test Envelope Fuser Solenoid Test22. High-Capacity Input Unit Test Displays Indication 23. Envelope Fuser Solenoid Test Displays Indication EIGS/MIGS Board Test EIGS/MIGS Board Test Continuous Loop Communication Loop-back Test Single Loop Communication Loop-back Test Continuous Loop Eigs Program RAM Test Continuous Loop EIGS/MIGS Bit Map Test Single Loop EIGS/MIGS Bit Map Test Continuous Loop Format Disk/Clear Error Log 26. LED Printhead Test Error Displays IndicationLED Printhead Test Disk Drive Test Single Loop With Stop on Error 27. Disk Drive Test Drive Indications Display Disk Drive Test Continuous Loop Wiring Diagrams and Electrical Data Wiring Diagrams and Electrical Data Wiring Diagrams and Electrical Data Connector J/P Index Wiring Diagrams and Electrical Data Connector J/P Index Connector Schematic Location Simplex/duplex A4 Connector Locations Connectors Inside the Front Cover Connectors Inside the Left Cover Connectors on the Duplex Cover Connectors Inside the Right Cover Connectors Inside the Top Cover Connectors on the Back Cover Connectors Inside the Back Cover J/P2-14 Signal Interface BoardJogging Motor Control Board Connectors Inside the Back Cover J/P18-62 Connectors Inside the Back Cover J/P 330 Voltage Isolation Diagrams Simplex -12 Vdc Circuits Simplex +12 Vdc Circuits Simplex +24 Vdc Circuits Duplex +5 Vdc Circuit Duplex +12 Vdc Circuits Ground System RS-232C DCE to DTE Signal Definitions Pin Function Host Interface ReferenceRS-232C Host Interface Standard DCE to DTE Signal Definition Host Printer Standard DCE to DTE RS-232C CableSpecial Considerations for RS-232 Host Interface Users DTE Host to Printer Option IBM PC/XT to Printer IBM PC/AT to Printer RS-422 Host Interface Connector Wiring Printer Macintosh Communication Port to PrinterRS-422 Host interface Centronics Parallel Signal Definitions Pin Function Name Centronics Parallel Host Interface 10. IBM Parallel to Printer Connector Wiring Host Signal IBM Parallel to Printer Mode PRN,,P Circuit Board Settings Signal Interface Board Settings PCL Board Settings Printhead Circuit Board Settings Wiring Diagrams and Electrical Data Removal/Replacement Procedures Vacuum Transport Unit Removal Simplex 100 Power Considerations RemovalBefore You Begin Photoconductor Removal Front Cover Removal Back Cover Removal Lower Back Cover Removal Replacement Note Left Side Cover Removal Service kit is attached inside the right side cover Right Side Cover Removal Simplex Right Side Cover Removal Duplex Vacuum Transport Unit Removal Simplex Back Detail Vacuum Transport Detail Vacuum Transport Unit Removal Duplex Spring Detail Support Assembly Detail Top Cover Removal Top Cover Support Removal Support Detail Top Cover Hinge Removal Hinge Detail Rear Duplex Cover Removal Mounting Screw Detail Front DuplexCover Removal Gas Spring Detail Operator Panel Removal Counter Removal IGS Board Removal PCL Board Removal Printhead Assembly Removal Front Detail Mounting Screws Disk Drive Housing Removal Cooling Fan Removal Cooling Fan Detail Duplex Fan Removal Toner Motor Removal Toner Motor Detail AC Power Supply Removal AC Power Supply Removal DC Power Supply Removal Right Side Detail Back Detail High Voltage Unit Removal PhotoconductorSeam Sensor Removal Front Detail Photoconductor Rear Guide Rail Removal Spring Signal Interface Board Removal Power Control Board Removal Power Control Board Detail Jogging Motor Power Control Board Detail Jogging Motor Control Board Removal Upper or LowerPaper Size Sensor Removal Upper Paper Size Sensor Detail Upper Cassette Mount Removal Upper Cassette Mount Removal Upper Cassette Mount Removal Cassette Mount Detail Left Side Detail Front Mounting Screw Detail Back Mounting Screw Detail Lower Cassette Mount Removal Lower Cassette Mount Removal Tray Lower Bracket Lower Cassette Mount Upper Paper Guide Removal Springs Cassette Release Cover Upper Paper Guide Roller Removal Lower Paper Guide Removal Paper Timing Guide Removal Paper Feed Drive Cover Mounting Screw CN58 Cleaner Drive Belt Removal Cleaner Drive Belt Detail Cleaner Drive Removal Cleaner Drive Detail Fuser Drive Belt Removal Fuser Drive Removal Fuser Drive Detail Paper Feed Drive Belt Removal Paper Feed Drive Belt Detail Replacement Notes Paper Timing Roller Removal Upper Feed Roller Removal Front Detail Cassette Release Cover Lower Feed Roller Removal Upper Pick-Up Roller Removal Upper Pick-Up Roller Drive Removal Upper Pick-up Roller Drive Detail Lower Pick-Up Roller Removal Lower Pick-Up Roller Drive Removal Lower Pick-up Roller Drive Detail Job Offset Assembly Removal Right Side Detail Back Detail Exit Pinch Roller Removal Mounting Screw Fuser Drive Cover Upper Static Brush Removal Upper Static Brush Detail Lower Static Brush Removal Exit Roller Assembly Removal Back Detail Exit Cover Removal Simplex Mounting Screws Fuser Drive Cover Exit Cover Removal Duplex Exit Cover Removal Duplex Paper Exit Sensor Removal Paper Exit Sensor Detail Paper Full Sensor Removal Paper Full Sensor Detail Front Cover Interlock Switch Removal Front Cover Interlock Switch Detail Back Cover Interlock Switch Removal Back Cover Interlock Switch Detail Top Cover Interlock Switch Removal Top Cover Interlock Switch Detail Erase Lamp Removal EP Cover Removal Replacement Note Main Motor Removal Main Motor Detail Main Gear Drive Removal Main Gear Drive Detail Fuser Drive Cover Duplex Control Board #1 Removal Duplex Control Board #1 Detail Duplex Control Board #2 Removal Duplex Tray Registration Motor Removal Registration Motor Detail Duplex Skew Correction Cable Removal Skew Correction Cable Detail Upper Duplex Drive/Clutch Assembly Removal Side Detail Duplex Route Motor/Solenoid Assembly Removal Duplex Route Motor/Solenoid Detail Roller Removal Roller Removal Upper Duplex Roller Cover Clip and Bearing Roller Solenoid Removal Roller Solenoid Detail Duplex Route Separator Removal Clip Location Duplex Paper Path Sensor Removal Paper Path Sensor Underside Detail Options Options Introduction Sheet/2500-Sheet Feeder Sheet/2500-Sheet Component Acronyms Bench Test Procedure Bench Test Procedure Prefeed Adjustment Procedure Slope Assembly Prefeed Adjustment Input Control Board Logic Diagram for 1200-Sheet/2500-Sheet Feeder Connection Sheet Stacker Sheet Stacker Component Acronyms 1400-Sheet Stacker Bench Test Preparation Options Connector Locations Connector Locations front view, cover removed Rear Side View cover removed Output Control Board Logic Stacker Actions and Sensor Inputs 11.Connection Diagram for the 1400-Sheet Stacker Options General Printer Maintenance General Printer Maintenance General Printer Maintenance Introduction Tool Requirements Service Kit End User Cleaning KitPrinter/Maintenance Record Tools/Supplies History LOG Every-Call Cleaning Procedure Clean Internal AreasClean the Fuser Unit Remove Major Consumable Supplies Clean the Developer Unit Clean the Cleaner Unit/Main ChargerClean the Photoconductor Unit Area Clean the Transfer Charger Adjusting Paper Feed Tension Printers With Paper Tension Levers Printers With Pick Pressure Adjusters Removing the Cassette Release Cover Paper Pick Pressure Adjusters Lubrication Procedure Front View Lubrication Points All Printers Front View Lubrication Symbol Part Lubricant Duplex Front View Lubrication Symbol Part LubricantFront View Lubrication Tables Duplex Only Rear View Lubrication All Printers Rear View Lubrication Symbol Part Lubricant Duplex Only Rear Lubrication Symbol Part LubricantRear View Lubrication Tables Duplex pinch rollers Drive gears Molycote Tray shaft Red grease Tune-Up Maintenance Procedure Tune-Up Kit Components Introduction Appendix a Abbreviations and Acronyms PC . . . . . . . . . . . .Photoconductor Index Index-2 Index-3 Index-4 Index-5 Index-6 Index-7