Lexmark 5021-0XX - Manual (Page 137)

Diagnostic information 2-59
5021-0XX
919—Lower feed unit (secondary paper assembly)
service check
Step Questions / actions Yes No
1 Turn printer off and remove
I/O board shield. See
“I/O
board removal” on
page 4-70
for steps to
remove I/O board shield. Is
cable properly connected
to I/O board connector
DCN14?
Go to step 2. Properly connect
cable. Retest
printer. If error
clears, problem
solved,
otherwise go to
step 2.
2 Remove right cover. See
“Right cover removal” on
page 4-22
. Check for
continuity and pin shorts of
cable that connects I/O
board DCN14 and lower
feed unit connector. Is
cable okay?
Go to step 3 Replace cable.
Retest printer. If
error clears,
problem solved,
otherwise go to
step 3.
3 Replace lower feed unit.
Does error clear? Problem solved. Go to step 4.
4 Replace I/O board. Does
error clear? Problem solved. Go to step 5.
5 Turn printer off and check
cable that connects engine
controller board connector
I1CN to I/O board
connector DCN1 for
continuity and pin shorts. Is
cable okay? Replace engine
controller board.
See
“Engine
controller
board removal”
on page 4-55
.
Replace cable.