White spot / black spot service check, White spot / black spot – Lexmark 5021-0XX User Manual
Page 202

2-124
Service Manual
5021-0XX
White spot / black spot service check
A white spot and black spot appear on paper.
Problem area
Action
1
Photodeveloper cartridge
There are foreign particles adhering
to photodeveloper OPC belt. Remove
photodeveloper cartridge (see
“Photodeveloper cartridge
removal” on page 4-11
).
Lightly wipe off foreign particles using
a cotton cloth.
If problem persists, replace
photodeveloper cartridge.
2
Transfer belt unit
There are foreign particles adhering
to transfer belt unit. Remove transfer
belt unit (see
).
Lightly wipe off foreign particles using
a cotton cloth.
If problem persists, replace transfer
belt unit.
3
Toner cartridge
Foreign particles mixed in toner.
Replace toner cartridge.
4
Transfer roller
There are foreign particles adhering
to transfer roller or transfer roller is
deformed. Replace transfer roller. See
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