Transfer roller clutch service check, 991—transfer roller clutch service check – Lexmark 5021-0XX User Manual
Page 145

Diagnostic information
2-67
5021-0XX
991—Transfer 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
transfer roller clutch from
cable. Measure resistance
between two outer pins on
transfer roller clutch. Does
resistance measure
between 119 and 145
ohms?
Go to step 2.
Replace faulty
transfer roller
clutch. See
2
Remove I/O board shield.
See
for steps to
remove I/O board shield.
Disconnect cable from
DCN10 on I/O board.
Check cable continuity from
DCN10 pins 7 and 8
(cable) to connector that
attaches to transfer roller
clutch. Ensure that pins are
not shorted. Is cable okay?
Replace I/O
board. See
. If
problem
persists, go to
step 3.
Go to step 3.
3
Remove engine controller
board shield. See
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
controller
board removal”
on page 4-55
Replace cable.