Lexmark 5021-0XX - 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
. Disconnect
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
“Clutch
removal” on
page 4-40
.
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 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
“I/O
board removal”
on page 4-70
. If
problem
persists, go to
step 3.
Go to step 3.
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.