2-64 Service Manual
7100-XXX
White line I service check
Vertical white line appears in a specific color area when print quality test print is run.
White line II service check
Vertical white line appears from leading edge to trailing edge of printed image.
Problem area Action
1 Test print Print the maintenance page. See “Printing the maintenance
and configuration pages” on page 3-3. White line appears
on specific color.
2 Toner cartridge • Developer roller of specific toner cartridge is dirty. Remove
foreign particle adhering to specific toner cartridge
developer roller.
• Developer roller surface is damaged. Replace problem
toner cartridge.
Problem area Action
1 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 dust-proof glass cover.
• Clean glass.
There are foreign particles adhering to laser beam opening of
printhead. Clean laser beam opening.
2 Toner cartridge Foreign particles mixed in toner cartridge. Replace faulty
cartridge.
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