Lexmark 5021-0XX - 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
“Transfer belt unit
removal” on page 4-7 ).
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
“Transfer roller removal” on
page 4-8
.