Lexmark C78x User Manual

Diagnostic information 2-99
5061
All colors have light print over the entire page
One color has light print over the entire page
Step Actions and questions Yes No
1 Replace the second transfer roll. See “Second
transfer roll removal” on page 4-89.
Does the light print persist?
Go to step 2 Problem resolved
2
Turn the printer off. Check the cable connections
between the transfer HVPS board and the system
board.
Go to step 3 Problem resolved
3
Check continuity on the cable between the rear second
transfer roll arm and the 1 lead on the transfer HVPS
board.
Replace the
transfer HVPS
board. See
“Transfer HVPS
board removal”
on page 4-92.
Check the
connection at the
second transfer
roll arm.
Step Actions and questions Yes No
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?
Go to step 2 Remove the
packaging
material, and
seat the
cartridge.
2
Print cartridge—The cartridge may be out of toner.
Change or switch the cartridge.
Does the issue persist?
Go to step 3 Problem resolved
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?
Replace the
FRUs in the order
shown:
• Cartridge
contact
assembly.
See
“Cartridge
contact
assembly
removal” on
page 4-35.
• Developer
HPVS board.
See
“Developer
HVPS board
removal” on
page 4-39.
Replace the
cartridge contact
assembly. See
“Cartridge
contact
assembly
removal” on
page 4-35.

Lexmark C78x Specifications

General

Brand	Lexmark
Model	C78x
Category	Printer
Language	English