Lexmark 5021-0XX - Manual (Page 142)

2-64 Service Manual
5021-0XX
986—Duplex connection error 2 service check
Step Questions / actions Yes No
1 Check duplex unit cable. is
cable properly connected? Replace duplex
unit. See
“Duplex unit
assembly
removal” on
page 4-13
. If
problem
persists, go to
step 2.
Properly connect
cable. If problem
persists, go to
step 2.
2 Check cable connection to
connector DPCN located
on engine controller board.
See
“Engine controller
board removal” on
page 4-55
for steps
required to remove engine
controller board cover. This
will allow access to DPCN.
Is cable properly
connected?
Go to step 3. Properly connect
cable. If problem
persists, go to
step 3.
3 Disconnect cable and
check for continuity
between DPCN connector
and duplex connector
located on back of printer.
Is there continuity? Replace engine
controller board.
See
“Engine
controller
board removal”
on page 4-55
.
Replace faulty
cable.