Lexmark 1020 manual Diagnostic Aids

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4078-00X

3. Diagnostic Aids

Use these diagnostic test procedures to verify a repair. The test procedures are entered by pressing and holding a button, or buttons, as you turn on the printer. To begin the test, hold the buttons until both the operator panel lights come on and then release the buttons after five seconds. Some tests require the End-of-Form Flag to be out of the sensor.

To remove the End-of-Form Flag from the sensor:

1.Open the sheet feeder.

2.Place a sheet of paper in the paper path until the End-of-Form Flag is tripped.

To terminate the test, turn the printer off.

Diagnostic Aids 3-1

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Contents 4078-00X 4078-00X Contents Connector Locations Safety Information PrefaceNorme di sicurezza SicherheitshinweiseConsignes de Sécurité Informações de Segurança Pautas de SeguridadSikkerhedsoplysninger Chinese Safety Information Korean Safety Information General Information Power ConsumptionMaintenance Approach Unique Tools Required For Service AbbreviationsDiagnostic Information StartError Indicator Table Power-On Self Test Post SequencePost Symptom Table Symptom ActionSymptom Tables Carrier Transport Problems4078-00X Paper Feed Problems Service Checks Carrier Transport Service CheckEnvelope Feed Service Check Perform the EOF and Home Position SensorsMaintenance Station Service Check Paper Feed Service Check Also check for loose or worn motor gear Paper Path Service Check Home Position Sensors Test on page 3-2, toParallel Port Service Check Power Service CheckPrint Quality Service Check FRU / Function ActionMaintenance Station Service Check on Print Quality Notice Diagnostic Aids EOF and Home Position Sensors Test Initialize Error Log Parallel Port Test Print Nvram Contents Reset Nvram to Emea Defaults Reset Nvram to USA Defaults Test Repair Information Handling ESD-Sensitive PartsReleasing Plastic Latches AdjustmentsRemoval Procedures Carrier Belt Removal Access Cover RemovalBase Assembly Removal Carrier Frame Assembly Removal Carrier Home Sensor RemovalDrive Train Assembly Removal Carrier Transport Motor RemovalFront Cover Removal Gutter Pad RemovalLarge Feed Roll Removal Maintenance Station Assembly RemovalMaintenance Wiper and Cap Removal Paper Feed Motor Removal Mid Frame Assembly RemovalPower Supply Removal Printhead Carrier Assembly Removal Rear Cover Removal Small Feed Roll Assembly Removal Sheet Feeder RemovalSmall Feed Roll Bracket Assembly Removal System Board Removal Connector Locations System Board Connectors Connector Connector Names Preventive Maintenance Lubrication SpecificationsHow To Use This Parts Catalog Parts CatalogAssembly 1 Covers Asm Part Units Description Index Number Assembly 2 Paper Feed / Carrier Transport / Maintenance See Print Quality Notice on Assembly 3 Electronics 11A5455 System Board with ROM Assembly 3 Electronics 4078-00X Assembly 4 Carrier 4078-00X Assembly 5 Sheet Feeder 4078-00X Index PostEmea USA