All Colors Have Light Print Over The Entire Page; One Color Has Light Print Over The Entire Page - Lexmark C77x Service Manual

All colors have light print over the entire page

Step Actions and questions
1 Replace the second transfer roll. See
transfer roll removal" on page
Does the light print persist?
2
Turn the printer off. Check the cable connections
between the transfer HVPS board and the system
board.
3 Check continuity on the cable between the rear second
transfer roll arm and the 1 lead on the transfer HVPS
board.

One color has light print over the entire page

Step Actions and questions
1 Print cartridge—Make sure the cartridge is seated
properly and all packaging material is removed from
the cartridge.
Has all packaging material been removed and the
cartridge seated correctly?
2
Print cartridge—The cartridge may be out of toner.
Change or switch the cartridge.
Does the issue persist?
3 Cartridge contact assembly—Check the cartridge
contact block. Make sure the PC drum contact pin is
not stuck. See "Cartridge contact assembly pin
locations (cyan, magenta and yellow)" on page 5-4
to identify the PC drum contact pin.
Does the PC drum contact pin move freely?
Yes
"Second Go to step 2
4-88.
Go to step 3
Replace the
transfer HVPS
board. See
"Transfer HVPS
board removal"
on page
Yes
Go to step 2
Go to step 3
Replace the
FRUs in the order
shown:
No
Problem resolved
Problem resolved
Check the
connection at the
second transfer
roll arm.
4-91.
No
Remove the
packaging
material, and
seat the
cartridge.
Problem resolved
Replace the
cartridge contact
assembly. See
"Cartridge
• Cartridge
contact
contact
assembly
assembly.
removal" on
See
page
"Cartridge
contact
assembly
removal" on
page 4-35.
• Developer
HPVS board.
See
"Developer
HVPS board
removal" on
page 4-39.
Diagnostic information
5061
4-35.
2-97