2-52 Service Manual
7100-XXX
Jitter service check
Uneven optical density appears periodically in horizontal direction.
Problem area Action
1 Photodeveloper cartridge Replace faulty photodeveloper cartridge. See
“Photodeveloper cartridge removal” on page 4-8.
Note: Photodeveloper cartridge is a customer order supply.
2 Main motor assembly • Irregular rotation of main motor assembly
• Main motor assembly gear unit failure
• Variation of OPC belt running speed due to failing main
motor assembly
Replace main motor assembly. See “Main motor assembly
removal” on page 4-26.
3 Developer drive assembly Replace faulty developer drive assembly. See “Developer
drive assembly removal” on page 4-22.
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