2-68 Service Manual
7100-XXX
Uneven density (right and left)
Optical density is different between right and left side of printed image.
Problem area Action
1 Rear cover assembly Open rear cover assembly and reclose, ensuring that both
sides properly latch. If rear cover assembly will not properly
latch, ensure that white door actuators located at top of rear
cover assembly are not damaged. If damaged, replace. These
items are part of parts packet. If actuators are not damaged,
and door will still not latch, replace rear cover assembly. See
“Rear cover assembly removal” on page 4-14.
2 Transfer roller Transfer roller is not properly installed. Remove transfer roller
and reinstall. See “Transfer roller removal” on page 4-6.
Ensure transfer roller bias pole is touching spring contact on
left side (as viewed from front of printer) of roller.
3 Laser unit assembly (printhead) Dust-proof glass of laser unit is smeared with toner or foreign
particles. Clean glass:
• Remove toner cartridges and photodeveloper cartridge.
See “Photodeveloper cartridge removal” on page 4-8.
• Open glass cover.
• Clean glass.
There are foreign particles adhering to laser beam opening of
printhead. Clean laser beam opening.
4 Toner cartridge Toner cartridge has insufficient amount of toner. Replace
toner cartridge.
5 Photodeveloper cartridge Replace faulty photodeveloper cartridge. See
“Photodeveloper cartridge removal” on page 4-8.
6 Transfer belt unit Replace faulty transfer belt unit. See “Transfer belt unit
removal” on page 4-5.
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