Lexmark 5021-0XX White spot / black spot service check, White spot and black spot appear on paper

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.

2-124Service Manual