Lexmark 1020 manual Paper Feed Service Check

Page 19

4078-00X

Paper Feed Service Check

If your machine does not have paper jam problems, continue with the service check. If your machine does have a paper jam problem, examine it for the following before you begin the service check:

Check the entire paper path for obstructions.

Be sure there is not too much paper in the sheet feeder. Be sure the correct type of paper is being used.

Check for static in the paper.

 

FRU

Action

 

 

 

1

System Board

Turn the printer off and disconnect CN6 from the

 

 

system board. Turn the printer on and check for a

 

 

pulse of 24 V dc between CN6-1 and ground and

 

 

CN6-2 and ground on the system board, as the

 

 

machine goes through P-O-S-T. If the voltage is

 

 

not present, check for motor pins shorted to the

 

 

motor housing. If you find a shorted pin, replace

 

 

the motor. If you still have a failure after replacing

 

 

the motor, replace the system board.

 

 

 

Diagnostic Information 2-9

Image 19
Contents 4078-00X 4078-00X Contents Connector Locations Preface Safety InformationConsignes de Sécurité SicherheitshinweiseNorme di sicurezza Sikkerhedsoplysninger Pautas de SeguridadInformações de Segurança Chinese Safety Information Korean Safety Information Maintenance Approach Power ConsumptionGeneral Information Abbreviations Unique Tools Required For ServiceStart Diagnostic InformationPower-On Self Test Post Sequence Error Indicator TableSymptom Action Post Symptom TableCarrier Transport Problems Symptom Tables4078-00X Paper Feed Problems Carrier Transport Service Check Service ChecksPerform the EOF and Home Position Sensors Envelope Feed Service CheckMaintenance Station Service Check Paper Feed Service Check Also check for loose or worn motor gear Home Position Sensors Test on page 3-2, to Paper Path Service CheckPower Service Check Parallel Port Service CheckFRU / Function Action Print Quality Service CheckMaintenance 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 Handling ESD-Sensitive Parts Repair InformationRemoval Procedures AdjustmentsReleasing Plastic Latches Base Assembly Removal Access Cover RemovalCarrier Belt Removal Carrier Home Sensor Removal Carrier Frame Assembly RemovalCarrier Transport Motor Removal Drive Train Assembly RemovalGutter Pad Removal Front Cover RemovalMaintenance Wiper and Cap Removal Maintenance Station Assembly RemovalLarge Feed Roll Removal Power Supply Removal Mid Frame Assembly RemovalPaper Feed Motor Removal Printhead Carrier Assembly Removal Rear Cover Removal Sheet Feeder Removal Small Feed Roll Assembly RemovalSmall Feed Roll Bracket Assembly Removal System Board Removal Connector Locations System Board Connectors Connector Connector Names Lubrication Specifications Preventive MaintenanceParts Catalog How To Use This 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 Post IndexEmea USA