White Spot / Black Spot Service Check - Lexmark C720 Service Manual

5024-001

White Spot / Black Spot Service Check

A white spot and black spot appears on the paper.
FRU
1 OPC Belt Cartridge
2 Transfer Drum
3 Toner Cartridge
4 Transfer Unit
Action
Foreign particles adhering to the
OPC belt or transfer drum.
Remove the belt cartridge.
• Lightly wipe off the foreign
particles using a cotton cloth.
• Replace the belt cartridge.
OPC belt or transfer drum damaged.
Open the transfer unit and check the
transfer drum.
• Lightly wipe off the foreign
particles adhering to the transfer
drum using a cotton cloth.
• Replace the damaged transfer
drum.
Foreign particles mixed in the toner.
Remove the toner cartridge.
Foreign particles adhering to the
transfer roller, or the transfer roller is
deformed.
Replace the transfer unit.
Diagnostic Information
2-103