Machine Id Error; Tray (X) Comm - Lexmark C920 Service Manual

5056-XXX

948 - Machine ID Error

948 Service
Machine ID
Step Questions/actions
1 Turn the printer off, and wait 30 seconds. Turn the
printer on. Did this fix the problem?
Are the EPROMs installed correctly?
2
3 Did replacing the printer controller board fix the
problem?

949 - Tray (x) Comm

Step Questions/actions
1 Replace the printer controller board.
Does this fix the problem?
2-18
Service Manual
Yes No
Problem solved. Verify proper
installation of the
EPROMs on both
the printer
controller board
and the printhead
controller board.
Go to step 2.
Replace the Install the
printer controller EPROMs
board. correctly.
Go to step 3.
Problem solved. Replace the
printhead
controller board.
Yes No
Problem solved. Replace the
expansion feeder
control board for
trays 2—5.
If the problem is
with the high-
capacity paper
feeder, replace
the HCPF board.