Lexmark 5021-0XX - Manual (Page 146)

2-68 Service Manual
5021-0XX
992—Transfer belt cleaning roller clutch service check
Step Questions / actions Yes No
1 Turn printer off and remove
printer right cover. See
“Right cover removal” on
page 4-22
. Disconnect
transfer belt cleaning roller
clutch from cable. Measure
resistance between two
outer pins on cleaning
roller clutch. Does
resistance measure
between 198 and 242
ohms?
Go to step 2. Replace faulty
cleaning roller
clutch. See
“Cleaning roller
clutch removal”
on page 4-36
.
2 Remove I/O board shield.
See
“I/O board removal”
on page 4-70 for steps to
remove I/O board shield.
Disconnect cable from
DCN10 on I/O board.
Check cable continuity from
DCN10 pins 3 and 4
(cable) to connector that
attaches to cleaning roller
clutch. Ensure that pins are
not shorted. Is cable okay?
Replace I/O
board. See
“I/O
board removal”
on page 4-70
. If
problem
persists, go to
step 3.
Replace cable.
3 Remove engine controller
board shield. See
“Engine
controller board removal”
on page 4-55
for steps to
remove shield. Check cable
that connects I2CN on
engine controller board to
DCN3 on I/O board for
proper connection,
damage, pin shorting, and
continuity. Is cable okay?
Replace engine
controller board.
See
“Engine
controller
board removal”
on page 4-55
.
Replace cable.