Lexmark C77x Service Manual page 74

5061
Step Actions and questions
4 Reinstall fuser and perform the
TEST" on page
Note: Use a spring hook to actuate the flag.
Does fuser exit sensor pass test?
5
Check the vacuum transport belts (VTB) for motion.
Observe the belt through the front door.
Are the belts on the VTB assembly turning?
6 Check the VTBs for wear or damage.
Are the belts worn or damaged?
7 Check the VTB plate for a buildup of debris.
Is there a debris buildup?
8
Does media move smoothly into the fuser from the
VTB?
2-32
Service Manual
"BASE SENSOR
3-24.
Yes No
Go to step 5 Perform the
following in order:
1. Reseat the
connector
J17 on the
system
board.
2. Replace the
fuser
assembly.
See
assembly
removal" on
page
3. Replace the
LVPS
assembly.
See
assembly
removal" on
page
4. Replace the
System
board. See
"System
board
removal" on
page
Go to step 6 Go to
transport belt
(VTB) removal"
on page 4-95
verify correct
installation.
Replace the Go to step 7.
vacuum transport
belt. See
"Vacuum
transport belt
(VTB) removal"
on page 4-95.
Clean off the VTB Go to step 8
plate.
Call the next level Replace the
of support. vacuum transport
belt. See
"Vacuum
transport belt
(VTB) fan
removal" on
page
"Fuser
4-44.
"LVPS
4-53.
4-89.
"Vacuum
to
4-97.