Lexmark 4090-001 manual Diagnostic Aids

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4090-001

3. Diagnostic Aids

Use these diagnostic test procedures to verify a repair. There are two ways to enter test procedures, each procedure will indicate the method to use:

Procedure 1:

•Press and hold the Paper Feed button while turning the printer on. Release the button when the printer completes POST.

Procedure 2:

•

•

Turn the printer off.

Use a two pin jumper on connector J6 as indicated, then turn the printer on. The test begins when the power button is pressed.

Note: You can use the two pin jumper on J7 to perform the tests. Remember to return the jumper to J7 when the test is finished.

A two pin jumper is also available in the parts packet: 1367169 and 69G4188.

Diagnostic Aids 3-1

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Contents 4090-001 4090-001 Contents Connector Locations Preventive Maintenance Safety Information PrefaceNorme di sicurezza SicherheitshinweiseConsignes de Sécurité Informações de Segurança Pautas de SeguridadSikkerhedsoplysninger Chinese Safety Information Korean Safety Information Maintenance Approach Resolution and Print SpeedPower Consumption General InformationUnique Tools Required For Service AbbreviationsDiagnostic Information StartError Indicator Table Power-On Self Test Post SequencePost Symptom Table Symptom ActionSymptom Tables Carrier Transport Problems4090-001 Paper Feed Problems First Print Line Service Check Service ChecksEnvelope Feed Service Check Maintenance Station Service Check Paper Feed Service Check Perform the ’Paper Path Service Check’ on Paper Path Service Check Parallel Port Service Check Power Service Check Print Quality Service Check Do not lubricate the carrier guide rod or Transport Service Check Perform the ’Encoder Sensor Test’ on page 3-2. IfDiagnostic Aids Encoder Sensor Test Initialize Error Log Paper Sensor Test Parallel Port Test Print Nvram Contents Test Repair Information Handling ESD-Sensitive PartsReleasing Plastic Latches AdjustmentsRemoval Procedures Base Assembly Removal Carrier Belt RemovalCarrier Frame Assembly Removal Carrier Transport Motor Removal Encoder Card Removal Code Module RemovalEdge Guide Asm and Paper Load Shaft Removal Encoder Strip RemovalExit Roller Removal Feed Arm Assembly RemovalExit Drive Belt Removal Front Cover Removal Gutter Pad RemovalInside Idler Gears Removal Large Feed Roll Removal Large Outside Gear Removal Left Side Frame Assembly Removal Mid Frame Assembly Removal Maintenance Station Assembly RemovalMaintenance Wipers and Caps Removal Manual Insert Tray RemovalPaper Guide and EOF Flag Assembly Removal Paper Feed Motor Removal4090-001 Pick Roll Hub, Shaft and Envelope Bucklers Removal Power Supply RemovalPaper Load Door Removal Printhead Cable, Cradle & Paper Deflector Removal 4090-001 Printhead Carrier Assembly Removal Printhead Rubber Backer RemovalRight Side Frame Assembly Removal Rear Cover RemovalSystem Board Removal Small Feed Roll Shaft, Rollers & Paper Flap RemovalStar Roller Removal Connector Locations System Board Connectors Encoder Card Connector Connector Connector NamesPreventive Maintenance Lubrication SpecificationsParts Catalog How To Use This Parts Catalog Assembly 1 Covers Asm Part Units Description Index Number Assembly 2 Frames 4090-001 Assembly 3 Paper Feed 4090-001 Assembly 4 Electronics 70G2695 System Board, W/O Code Module Assembly 4 Electronics 4090-001 Assembly 5 Carrier 4090-001 Assembly 6 Carrier Transport 4090-001 Assembly 7 Sheet Feeder 4090-001 Assembly 8 Maintenance Station 4090-001 Index Post4090-001