Lexmark 5021-0XX - Manual (Page 187)

Diagnostic information 2-109
5021-0XX
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 4-11 .
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 4-38
.
3 Developer drive assembly Replace faulty developer drive
assembly. See
“Developer drive
assembly removal” on page 4-32 .