Lexmark C77X, Service Manual

Page: 142 / 480

2-98
Service Manual
5061
Black and white only—cyan, magenta, and yellow are missing
Light print over the entire page
•
If all colors have light print, go to “All colors have light print over the entire page” on page 2-99 .
•
If only one color has light print, go to “One color has light print over the entire page” on page 2-99 .
7 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 pin operate correctly?
Go to step 8 Replace the
cartridge contact
assembly. See
“Cartridge
contact
assembly
removal” on
page 4-35
.
8 Perform a continuity check on the developer HVPS
cable.
Does the cable check out?
Replace in order:
1. Developer
HVPS board.
See
“Developer
HVPS board
removal” on
page 4-39
.
2. System
board. See
“System
board
removal” on
page 4-90
.
Replace the
developer HVPS
cable.
Step Actions and questions Yes No
1 Check the Print Mode setting in the Color Menu.
Is the Print Mode set to Black & White ?
Change the
setting to
Color .
Go to step 2
2 Ask the user or network administrator to check if the
correct color driver is installed.
Is the correct color driver installed?
Install the correct
color driver. Go to “Black
only retract
(BOR) service
check” on
page 2-80
.
Step Actions and questions Yes No