TAG 031 Toner Patch Reference Level Too Low | HP C30 guide

TAG 031: Toner Patch Reference Level Too Low

Error Code:

031

Possible Causes: Contamination of the toner patch sensor or printhead lens

Possible Defects: Photoconductor unit

Connectors or wiring

PCL board

Developer unit

1 Turn the printer off and unplug the power cord.

•Perform the every-call cleaning procedure, described in Chapter 9, “General Printer Mainte- nance” .

•Clean the toner patch sensor on the developer unit.

•Clean the printhead lens.

•Run at least 200 test prints to detone the printer’s engine.

Has the problem been resolved?

No: Contamination 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 Have the photoconductor and developer units been replaced recently?

No: Continue.

Yes: Go to #6 in this TAG.

4 Replace the photoconductor unit.

•Run 200+ test prints to reduce toner concentration in the developer unit.

Has the problem been resolved?

No: Reinstall the original photoconductor unit and continue.

Yes: The photoconductor was at fault; turn to TAG 002: Check & Problem Resolution.

5 Replace the developer unit.

•Run test prints.

Has the problem been resolved?

No: Reinstall the original developer unit and continue.

Yes: Turn to TAG 002: Check & Problem Resolution. If the problem reappears, the toner/car- rier mix may be old or contaminated.

Troubleshooting Analysis Guide (TAGs)

3-47

Image 99

HP C30 manual TAG 031 Toner Patch Reference Level Too Low, Has the problem been resolved?

Contents

Cut Sheet Printers Maintenance Manual Models C30 and C30D Trademarks Printing History Conventions Preface Using This Manual Other Manuals Page Contents Viii Print Quality Samples Diagnostic Tests Wiring Diagrams and Electrical Data Removal/Replacement Procedures Xii Options General Printer Maintenance Abbreviations and Acronyms Every-Call Cleaning Procedure Printer Troubleshooting Overview Printing and Troubleshooting Overview Receiving data Theory of Operation Host Paper Path and Cycle Sequence Simplex PrintingDuplex Printing Paper Path Paper Error Code Technical DefinitionsError Code Technical Definitions Type Description Path Fuser OPC 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 General Troubleshooting Tips Troubleshooting Overview Problem Printer or Host? Protocol Converters Reading the Error Log Confirming Line Power Did only the Ready light come on with no numeric display? Using the Troubleshooting Analysis Guide TAGTAG 001 Troubleshooting a Problem Sample TAG 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 Producing a Toner Patch on the Photoconductor Unit Completing a Service Call Drive Indication Display Clearing the Error Log TAG Cross- Reference Tables TAG Cross-Reference Tables Printer Error Codes Printer Error Code Meaning Go to TAG Error Code/TAG Cross-Reference PCL Error Codes PCL Error Code Meaning Go to TAG PCL Error Codes PCL Error Code Meaning Go to TAG Code IGS Firmware Error Codes IGS Firmware Error Code MeaningPCL Failure Error Codes IGS Software Error Codes TAG Cross- Reference Tables TAG Cross- Reference Tables 11. Blank Print TAGs Blank Prints Go to TAG Print Quality/TAG Cross-Reference 15. Misregistration TAGs Misregistered Prints Go to TAG 12. Light Print TAGs Light Prints Go to TAG13. Dark Print TAGs Dark Prints Go to TAG 14. Skewed Path TAGs Print Quality/TAG Cross-Reference Mechanical Malfunction/TAG Cross-Reference 18. Operator Panel Problems TAGs Go to TAG19. Output Tray Problem TAGs Output Tray Problems Go to TAG 20. Cassette Problem TAGs Cassette Problems Go to TAG 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 Did the power-on-reset end with an error code? TAG 001 Troubleshooting a Problem Display? Did an error code appear while running the prints?Did an error code appear while running test prints? Does an error code appear? Can you identify the problem? Fuser unit may be hot TAG 002 Check & Problem Resolution Have you completed the every-call cleaning procedure? Handle gently to avoid breaking the charger wire Display Indication Are the test prints clean and printing correctly? If 7-0 appears, press Stop immediately. do not Proceed Do the error log entries appear as 0000? Does the voltage change from 0 Vdc to +12Vdc? Is error code 010 displayed?TAG 010 Upper Cassette Malfunction Is it in good working order? Troubleshooting Analysis Guide TAGs Does the voltage change from 0Vdc to +12Vdc? Is error code E10 displayed?E10 Envelope Tray Out of Envelopes Does 1-8 appear on the operator panel? Troubleshooting Analysis Guide TAGs TAG 011 Lower Cassette Malfunction Is error code 011 displayed? 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? Is the lower cassette properly latched? TAG 013 Lower Cassette Not 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? Does the voltage change from +24 Vdc to 0 Vdc? Is there continuity on all? Is there continuity? TAG 021 Paper Jam/Misfeed in /Lower Cassette Area Is error code 020 displayed? Is there ground? Then turn to TAG 002 Check & Problem Resolution Is there continuity? Is paper wrapped around the heat roller? TAG 022 Paper Jam in the Transfer or Fuser Area Has the fuser unit been replaced recently? Is error code 022 still displayed?Has the problem been resolved? Does the multiple feed problem still exist? Is there continuity on both? Does the paper timing roller shaft turn? Are the parts in good working order? Are they damaged or contaminated with toner?Are these parts in good working order? Is there improper registration? Is the voltage 100 Vac? Does the vacuum transport unit fan hold the paper in place? 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 the voltage +12 Vdc? Is error code 025 displayed?Is error code 025 still displayed? TAG 025 Paper in Input Area Before Printing Then turn to TAG 002 Check & Problem Resolution TAG 026 Paper in Output Area Before Printing Is error code 026 displayed? Has the developer unit been replaced recently? Is error code 030 still displayed?TAG 030 Developer Bias Short/Failure Are the voltages correct? 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? Do the prints appear light or blank? Are all connectors and wiring connected properly? Has the seal has been removed from the toner cartridge? TAG 035 Out of Toner or ADD Toner Indicator OnIs error code 035 displayed? Has the photoconductor unit been replaced recently? Is there continuity? Is error code 036 displayed? TAG 036 Developer Unit Not Installed 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? Is the voltage between +2 to +6 Vdc? Yes Go to TAG 002 Check & Problem Resolution Figure a 12V Is error code 044 displayed? TAG 044 Main Charger/Transfer Charger Circuit OpenHas the main charger been replaced recently? Is error code 050 displayed? Is paper jammed inside the transfer charger housing?Is error code 046 displayed? Is error code 051 displayed? Continuity Is error code 045 displayed? Is error code 045 still displayed?TAG 045 Main Charger Circuit Shorted Is there continuity? Is there continuity to ground? TAG 050 Transfer Charger Circuit Shorted Has the problem been resolved? Did you measure +12 Vdc? Is error code 055 displayed?TAG 055 Erase Lamp Malfunction Is the value displayed less than 220? Is there continuity? TAG 070 Fuser Unit Malfunction Is error code 070 or 073 displayed? Is the voltage approximately +5 Vdc? Does the fuser lamp light? Is the voltage at least 100 Vac? Is the resistance between I KΩ and 400 KΩ? 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? Does the lamp turn on before error code 072 is displayed? TAG 072 Fuser Unit Temperature Too High Is there resistance? Is the resistance at least 1K‡WW? 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 Is the voltage -12 Vdc? TAG 098 -12 Vdc Power Shorted 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 TAG 100 PCL Board Interface Malfunction Was an error code displayed during the power-on-reset? Is error 101 displayed on the operator panel TAG 101 IGS Controller Diagnostic Failure 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 there continuity on any? Is error code 574 displayed?Is error code 575 displayed? Is error code 576 displayed? 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 TAG 201 IGS-PCL Interface Malfunction Is error code 201 displayed?Is error code 121 or 123 displayed? Are the connectors or wiring damaged? Replace the IGS board Power-on-reset the printer 606, 600 TAG 405 IGS Bit-Map RAM Malfunction Is the operator panel still blank? TAG 500 +5 Vdc Power Malfunction 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 Is the voltage +100 Vac? TAG 600 AC Power Malfunction 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 Is one of the function keys not working properly? TAG 610 Operator Panel MalfunctionDo the status lights stay on continuously? Did you hear the tone after pressing each function key? 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? Is the circuit board or mounting damaged or contaminated? TAG 702 Paper Size Detection MalfunctionDoes the display still indicate the incorrect paper size? Is the paper size sensing mechanism in good working order? Is the circuit board or mounting contaminated or damaged? Is there a wiring problem? 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? Is the lower cassette in good working order? TAG 704 Lower Cassette Malfunction Paper cassette TAG 705 Multiple Paper Feeding Is either part damaged, worn, or contaminated? TAG 706 Paper Damaged or WrinkledAre the prints wrinkled or damaged? Is the print on the paper skewed? Did the upper paper guide lock into place? TAG 707 Upper Paper Guide Assembly Not Closing Is the counter functioning properly? TAG 750 Counter Malfunction Troubleshooting Analysis Guide TAGs 141 TAG 751 Main Drive Motor Runs Continuously TAG 753 External Communications Malfunction Is there a problem with the connectors or pins? Did the diagnostic test run properly? RTS Does the problem appear while using RS-232C communications? TAG 754 Attachment Option Malfunction Are all voltages correct? Prints With Light Horizontal Bands TAG 800 Prints Blank or With Dark Horizontal Bands Is a developed image on the photoconductor? Does the magnetic brush turn? Do the LEDs illuminate?Are the prints blank without dark bands? Is the coupling damaged? Troubleshooting Analysis Guide TAGs 151 Are they jagged? TAG 801 Prints Light or Light With Carrier Particles Is the developed image on the photoconductor correct? Do both drive couplings rotate freely? Does the coupling turn? 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 Is the photoconductor belt covered with toner? TAG 805 Black Prints Replace the high voltage unit Run test prints Replace the IGS board Run test prints TAG 806 Prints with Dark Spots or Scratches Cleaner unit Are these mechanisms in good working order? Does the paper have any problems? TAG 807 Misregistered/Skewed Prints Simplex Is the problem with the upper cassette? 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 it connected properly? Is there continuity at each? Troubleshooting Analysis Guide TAGs 175 Repair or replace the PCL board Run test prints TAG 809 Blurred or Smeared Vertical Streaks on Prints Is the vacuum transport unit in good working order? Does the vacuum fan hold the paper? 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 Is the voltage 0.5 Vdc? Are any of the values out of specification? 186 Troubleshooting Analysis Guide TAGs Connectors or wiring AC power supply unit PCL board TAG 812 Uneven or No Fusing on Prints Does the lamp light within 1.5 minutes? Is the paper within specification? Is the belt attached? TAG 813 Residual Images on Prints 190 Troubleshooting Analysis Guide TAGs TAG 815 Prints Resulting From Printhead Malfunctions TAG 900 Top Cover Interlock Malfunction, Duplex Is error code 090 displayed? 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 Is the duplex paper path sensor in good working order? TAG 902 Paper Jam in Duplex Area Is the a roller clutch in good working order? Is the C roller solenoid in good working order? Is the input 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 Good Quality Print Sample 1 Good Quality Print Washout Sample 2 Washout Blank Print Sample 3 Blank Print Light Print Sample 4 Light Print Light Print With Background Sample 5 Light Print With Background Voids of White Spots Sample 6 Voids or White Spots Light Vertical Streaks Sample 7 Light Vertical Streaks Blank Vertical Bands Sample 8 Blank Vertical Bands Light Horizontal Bands Sample 9 Light Horizontal Bands 10.Black or Dark Print Sample 10 Black or Dark Print 11.Dark Specks, Lines, or Areas Sample 11 Dark Specks, Lines, or Areas 12.Dark Vertical Lines Sample 12 Dark Vertical Lines 13. Skewed prints Sample 13 Skewed Prints 14.Misregistration Sample 14 Misregistration 15.Overtoned Print Sample 15 Overtoned Print 16.Blurred Images or Characters Sample 16 Blurred Images or Characters 17.Varying Print Density Sample 17 Varying Print Density 18. Background Sample 18 Background 19.Residual Images Sample 19 Residual Images 20. Wrinkles Sample 20 Wrinkles 21.Fusing Problems Sample 21 Fusing Problems Diagnostic Tests 001 How to Run Diagnostics Diagnostic Tests Operator Panel Test Upper Cassette TestPaper Size Codes Display Indication Intentionally excluded Lower Cassette Test Sensor Test Displays Sensor Description Sensor Test Sequence Paper Transport Clutch Test Sequence Counter TestClutch Test Displays Indication Jogging Motor Test Error Displays Indication Jogging Motor TestPhotoconductor Test Toner Supply Motor Test Toner Supply Motor Test Error Displays Indication 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 Erase Lamp Test 11. Erase Lamp Test Error Displays Indication 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 23. Envelope Fuser Solenoid Test Displays Indication High-Capacity Input Unit TestEnvelope Fuser Solenoid Test 22. High-Capacity Input Unit Test Displays Indication EIGS/MIGS Board Test Continuous Loop EIGS/MIGS Board Test Communication Loop-back Test Single Loop Eigs Program RAM Test Continuous Loop Communication Loop-back Test Continuous Loop EIGS/MIGS Bit Map Test Continuous Loop EIGS/MIGS Bit Map Test Single Loop Format Disk/Clear Error Log 26. LED Printhead Test Error Displays IndicationLED Printhead Test 27. Disk Drive Test Drive Indications Display Disk Drive Test Single Loop With Stop on Error Disk Drive Test Continuous Loop Wiring Diagrams and Electrical Data Wiring Diagrams and Electrical Data Connector J/P Index Wiring Diagrams and Electrical Data Wiring Diagrams and Electrical Data Connector Schematic Location Connector J/P Index Simplex/duplex A4 Connectors Inside the Front Cover Connector Locations 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 Simplex -12 Vdc Circuits Voltage Isolation Diagrams 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/AT to Printer IBM PC/XT to Printer RS-422 Host Interface Connector Wiring Printer Macintosh Communication Port to PrinterRS-422 Host interface Centronics Parallel Host Interface Centronics Parallel Signal Definitions Pin Function Name IBM Parallel to Printer 10. IBM Parallel to Printer Connector Wiring Host Signal Mode PRN,,P Signal Interface Board Settings Circuit Board Settings Printhead Circuit Board Settings PCL Board Settings Wiring Diagrams and Electrical Data Removal/Replacement Procedures Vacuum Transport Unit Removal Simplex 100 Photoconductor Removal Power ConsiderationsRemoval Before You Begin Front Cover Removal Back Cover Removal Lower Back Cover Removal Left Side Cover Removal Replacement Note Right Side Cover Removal Simplex Service kit is attached inside the right side cover Right Side Cover Removal Duplex Back Detail Vacuum Transport Unit Removal Simplex Vacuum Transport Detail Spring Detail Vacuum Transport Unit Removal Duplex Top Cover Removal Support Assembly Detail Support Detail Top Cover Support Removal Hinge Detail Top Cover Hinge Removal Mounting Screw Detail Rear Duplex Cover Removal Gas Spring Detail Front DuplexCover Removal Operator Panel Removal Counter Removal IGS Board Removal PCL Board Removal Printhead Assembly Removal Front Detail Mounting Screws Disk Drive Housing Removal Cooling Fan Detail Cooling Fan Removal Duplex Fan Removal Toner Motor Detail Toner Motor Removal AC Power Supply Removal AC Power Supply Removal Right Side Detail Back Detail DC Power Supply Removal High Voltage Unit Removal PhotoconductorSeam Sensor Removal Front Detail Photoconductor Rear Guide Rail Removal Spring Signal Interface Board Removal Power Control Board Detail Power Control Board Removal Jogging Motor Control Board Removal Jogging Motor Power Control Board Detail Upper Paper Size Sensor Detail Upper or LowerPaper Size Sensor Removal Upper Cassette Mount Removal Upper Cassette Mount Removal Upper Cassette Mount Removal Front Mounting Screw Detail Back Mounting Screw Detail Cassette Mount Detail Left Side 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 Detail Cleaner Drive Belt Removal Cleaner Drive Detail Cleaner Drive Removal Fuser Drive Belt Removal Fuser Drive Detail Fuser Drive Removal Paper Feed Drive Belt Detail Paper Feed Drive Belt Removal Paper Timing Roller Removal Replacement Notes Front Detail Cassette Release Cover Upper Feed Roller Removal Lower Feed Roller Removal Upper Pick-Up Roller Removal Upper Pick-up Roller Drive Detail Upper Pick-Up Roller Drive Removal Lower Pick-Up Roller Removal Lower Pick-up Roller Drive Detail Lower Pick-Up Roller Drive Removal Job Offset Assembly Removal Right Side Detail Back Detail Exit Pinch Roller Removal Mounting Screw Fuser Drive Cover Upper Static Brush Detail Upper Static Brush Removal 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 Detail Paper Exit Sensor Removal Paper Full Sensor Detail Paper Full Sensor Removal Front Cover Interlock Switch Detail Front Cover Interlock Switch Removal Back Cover Interlock Switch Detail Back Cover Interlock Switch Removal Top Cover Interlock Switch Detail Top Cover Interlock Switch Removal Erase Lamp Removal EP Cover Removal Replacement Note Main Motor Removal Main Motor Detail Main Gear Drive Detail Fuser Drive Cover Main Gear Drive Removal Duplex Control Board #1 Detail Duplex Control Board #1 Removal Duplex Control Board #2 Removal Registration Motor Detail Duplex Tray Registration Motor Removal Duplex Skew Correction Cable Removal Skew Correction Cable Detail Side Detail Upper Duplex Drive/Clutch Assembly Removal Duplex Route Motor/Solenoid Detail Duplex Route Motor/Solenoid Assembly Removal Roller Removal Roller Removal Upper Duplex Roller Cover Clip and Bearing Roller Solenoid Detail Roller Solenoid Removal Duplex Route Separator Removal Clip Location Paper Path Sensor Underside Detail Duplex Paper Path Sensor Removal Options Options Introduction Sheet/2500-Sheet Component Acronyms Sheet/2500-Sheet Feeder Bench Test Procedure Bench Test Procedure Slope Assembly Prefeed Adjustment Prefeed Adjustment Procedure Input Control Board Logic Connection Diagram for 1200-Sheet/2500-Sheet Feeder Sheet Stacker Component Acronyms Sheet Stacker 1400-Sheet Stacker Bench Test Preparation Options Connector Locations front view, cover removed Connector Locations Rear Side View cover removed Stacker Actions and Sensor Inputs Output Control Board Logic 11.Connection Diagram for the 1400-Sheet Stacker Options General Printer Maintenance General Printer Maintenance General Printer Maintenance Introduction Tools/Supplies Tool Requirements Service KitEnd User Cleaning Kit Printer/Maintenance Record History LOG Remove Major Consumable Supplies Every-Call Cleaning ProcedureClean Internal Areas Clean the Fuser Unit Clean the Transfer Charger Clean the Developer UnitClean the Cleaner Unit/Main Charger Clean the Photoconductor Unit Area Printers With Paper Tension Levers Adjusting Paper Feed Tension Removing the Cassette Release Cover Printers With Pick Pressure Adjusters Paper Pick Pressure Adjusters Lubrication Procedure Front View Lubrication Points Duplex Only All Printers Front View Lubrication Symbol Part LubricantDuplex Front View Lubrication Symbol Part Lubricant Front View Lubrication Tables 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