Lexmark 4076-0XX manual System Board Removal

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4076-0XX

System Board Removal

1.Remove the top cover.

2.Disconnect the print head cables from the system board. You may have to open the print head cable connectors on the system board first, then disconnect the cables.

3.Disconnect connectors J4, J5, and J6 from the system board. 4. Remove the machine from the base. To do this, push the frame latches out as you lift the machine from the base. Set the machine aside.

4.Disconnect the power supply cable from the system board.

5.Remove the 6 system board mounting screws and remove the system board.

6.Check the bi-directional alignment adjustment.

After replacing the system board, reset the printer to the factory defaults as follows:

For countries using 8.5 x 11 paper:

1.Turn off the printer.

2.Hold down the Form Feed, Line Feed, and Install Ink Cartridge buttons and turn on the printer. Continue to hold down the but- tons until all the lights are off.

3.Check the bi-directional alignment.

For countries using A4 paper:

1.Turn off the printer.

2.Place a piece of paper in the manual feed slot to push the EOF flag out of the sensor.

3.Hold down the Install Print Cartridge, Form Feed and Draft/Letter Quality buttons and turn on the printer. Continue to hold down the buttons until all the lights are off.

4.Check the bi-directional alignment.

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Contents •Manuals Menu •Table of Contents •Start Diagnostics•Safety and Notices •Trademarks •Index 4076-0XXCopyright Lexmark International, Inc. 1994, 4076-0XXSecond Edition May, All Rights ReservedContents Repair Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . How To Use This Parts Catalog 4076-0XXElectronic Emission Notices Notices and Safety InformationFederal Communications Commission FCC Statement Avis de conformité aux normes d’Industrie Canada Industry Canada Compliance StatementThe United Kingdom Telecommunications Act Japanese VCCI Notice Safety Informationviii Consignes de Sécurité SicherheitshinweiseNorme di sicurezza Informações de Segurança Pautas de SeguridadInformació de Seguretat Chinese Safety Information Korean Safety Information General Information Power Consumption• • • • • • • Maintenance ApproachOptions Unique Tools Required For Service AbbreviationsStart Diagnostic Information1.Run the “Test Page” on page Alternating Light Pattern Error Indicator TableError ActionGo to the “Maintenance Station Service Check” on pagePower-on-self-testPost Sequence POST Symptom Table SymptomCommunications Problem Symptom TablesCarrier Transport Problems Maintenance Station ProblemsPower Problems 4076-0XX Paper Feed ProblemsPrint Quality Problems First Print Line Service Check Service ChecksEnvelope Feed Service Check 4076-0XX SIMM ProblemMaintenance Station Service Check Operator Panel Service Check Paper Feed Service Check • • • • •Paper Feed Motor 4076-0XX Paper Path Service Check can print. Run the “Parallel Port Test” Parallel Port Service CheckRun the “Serial Adapter Test” on Power Service Check Print Quality Service Check Perform the “Purge Test” on page“Maintenance Station Service Check” Alignment Adjustment” on pageTransport Service Check Simm Service CheckFRUU or PROCEDURE the “Maintenance Station Service Perform the “Encoder Sensor Test” onDemo Test Diagnostic AidsPrint Fonts Test Purge Test Print NvramTest Page Paper Sensor TestEncoder Sensor Test Hex PrintParallel Port Test Initialize NvramSerial Adapter Test Repair Information Handling Esd-sensitivePartsAdjustments Bi-directionalAlignment AdjustmentRemoval Procedures Releasing Plastic LatchesAuto Sheet Feed ASF Assembly Removal ASF Envelope Buckler And Pick Roller Hub RemovalASF Paper Load Lever Removal ASF Right And Left Edge Guide Assemblies RemovalCarrier Removal Carrier Guide Removal Carrier Transport Belt RemovalCarrier Transport Motor Removal Carrier Transport Motor Frame Removal Encoder Strip RemovalEnd-of-formsFlag Removal Exit Roller Assembly RemovalFeed Arm Assembly Removal Eprom RemovalLarge Feed Roller Assembly Removal Inside Idler Gears RemovalLeft Side Frame Removal Middle Frame Removal Maintenance Drive And Rocker Assemblies RemovalOperator Panel Removal Paper Feed Motor Removal Outside Idler Gears RemovalPaper Ejectors Removal Paper Guide RemovalPower Supply Removal Paper Release Lever RemovalPrint Head Cable Removal Right Side Frame Removal Rubber Backer Removal Small Feed Roller Assembly RemovalStar Roller Removal System Board Removal Top Cover Removal Connector Connector LocationsSystem Board Connectors Connector NamesFLASH/RAM SIMM Option Maintenance MotorCode Module Lubrication Specifications Preventive Maintenance• • • • • • • How To Use This Parts Catalog Parts Catalog4076-0XX Assembly 1: Covers 9 7 4 8 2 6 Units Asm.Part Description4076-0XX Assembly 2: Frames 7 2 3 4 5 1 6 Part 4076-0XX Assembly 3: Paper Feed 1 3 2 4 5 6 7 8 9 Part 4076-0XX Assembly 3: Paper Feed Cont Part 4076-0XX Assembly 4: Electronics 5 4 4 3 2 10 9 1 8 11 6 7Part 4076-0XX Assembly 4: Electronics Cont 5 4 4 3 2 10 9Part 4076-0XX Assembly 4 Electronics Cont 12 13 12 9 10 11Part 4076-0XX Assembly 5: Carrier Unit 4076-0XX Assembly 6: Carrier Transport 2 6 3Part 8 4 7 4076-0XX Assembly 7: Auto Sheet Feed 6 310 13 12 2 5 1 14 9Part 4076-0XX Assembly 8: Maintenance Station 3 1 2 4 Part 4076-0XX Assembly 9: Options 1 Part Index Unique Tools