Lexmark C91 Series, Service Manual

Page: 63 / 493

Diagnostic information
2-13
5055-xxx
933 - Black Printhead Error
Step Questions/actions Yes No
1 Check to ensure that the
cables between the LED
printhead and the printhead
controller board as well as
the cables between the
printhead controller board
and the printer controller
board are properly
connected.
Are they properly
connected?
If you have a
printer with serial
number
XX–0XXXX, go
to step 2.
If you have a
printer with serial
number
XX–1XXXX and
above, go to
step 4.
Properly connect
the cables.
2 For serial number
XX–0XXXX: Is fuse 4 on
the printhead control board
open? Replace the
printhead control
board, cables
(K13, K24), and
LED printhead. Replace the
printhead
controller board.
3 Did replacement of the
printhead controller board
correct the problem? Problem solved. Replace the
printer controller
board.
4 For serial number
XX–1XXXX and above:
Replace the LED printhead
for the affected color.
Did this resolve the
problem?
Problem solved. Replace the
printhead
controller board
and go to step 5.
5 Did replacement of the
printhead controller board
resolve the problem? Problem solved. Replace the
printer controller
board.