Preventive Maintenance; Safety Inspection Guide - Lexmark W850n Service Manual

6. Preventive maintenance

This chapter describes procedures for printer preventive maintenance. Follow these recommendations to help
prevent problems and maintain optimum performance.

Safety inspection guide

The purpose of this inspection guide is to aid you in identifying unsafe conditions.
If any unsafe conditions exist, find out how serious the hazard could be and if you can continue before you
correct the hazard.
Check the following items:
•
Damaged, missing, or altered parts, especially in the area of the on/off switch and the power supply
•
Damaged, missing, or altered covers, especially in the area of the top cover and the power supply cover
•
Possible safety exposure from any non-Lexmark attachments
LEXMARK W8XX
MEDIA TRAY—PRINTER
2TM/TTM (if equipped)
Media Side Guides
Media End Guide
Separation Pad
Tray Lift Gear Group
MEDIA FEED UNIT—PRINTER 2TM/TTM (if equipped)
Feed Roll
Pick Roll
Separation Roll
MPF feed roll
Transport Roll Assembly
Sensor (registration)
Sensor (tray 2 feed-out)
MEDIA FEED UNIT HCF (if equipped)
Feed Roll
Pick Roll
Separation Roll
HCF Transport Roll Assembly
Front Edge Guide
Rear Edge Guide
Long Edge Guide
Separation Pad
TRANSFER ROLL
Transfer Roll
FUSER UNIT
Fuser Unit
Sensor (fuser exit)
DUPLEX (if equipped)
Duplex Transport Roll (2)
Duplex Transport Roll Middle
EVERY SERVICE CALL
Inspect
Inspect
Inspect
Inspect
Inspect
Inspect
Inspect
Inspect
Inspect
Inspect
Inspect
Inspect
Inspect
Inspect
Inspect
Inspect
EVERY 300K NOTE
Inspect Check for correct positioning
Inspect Check for correct positioning
Clean Damp cloth
Inspect
Replace Verify page count before replacing
Replace Verify page count before replacing
Replace Verify page count before replacing
Clean Water or alcohol
Clean Water or alcohol
Clean Brush or blower brush
Clean Brush or blower brush
Replace Verify page count before replacing
Replace Verify page count before replacing
Replace Verify page count before replacing
Clean Water or alcohol
Check for correct positioning
Check for correct positioning
Check for correct positioning
Clean Damp cloth
Replace
Replace
Clean Blower brush
Clean Water or alcohol
Clean Water or alcohol
4024-110
6-1
Preventive maintenance
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