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15. White Spot/Black Spot - White spot and black spot appear on the print.
Main Causes
1.
Foreign particles adhering to the photoconductor belt or transfer drum.
2.
photoconductor belt or transfer drum is damaged.
3.
Foreign particles mixed in with the toner.
4.
Foreign particles adhering to the transfer roller.
5.
Deformation of transfer roller..
OPC Belt
Countermeasures
1.
Remove the belt module.
a. Lightly wipe off the foreign particles adhering to photoconductor belt, using cotton cloth.
b. Replace the damaged belt module with a new cartridge.
2.
Open the transfer unit, and check the transfer drum.
a. Lightly wipe off the foreign particles adhering to transfer drum, using cotton cloth.
b. Replace the damaged transfer drum with a new drum. (See Chapter 7)
3.
Remove the toner module.
a. Clean the surface of developer roller. (See Chapter 7)
b. Replace the toner module with a new module. (See Chapter 6)
4.
Replace the transfer unit with a new unit.
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SuperScript 4400 — Maintenance Guide
Belt Cartridge
Transfer Drum
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