Lexmark M410 - Optra B/W Laser Printer Service Manual page 57

4045-XXX
Operator Panel Display Service Check
SERVICE TIP: The printer has detected a problem with the engine
board, operator panel cable or operator panel assembly if POST
does not complete and the printer emits 5 beeps and stops in a
continuous pattern until the printer is turned off. The operator panel
cable is an individual cable on some printers and a combination
cable assembly with the cover switch cable on later models.
Note: If the operator panel is operating properly except for a PEL or
a few PELS missing or broken, run the
the hardware tests before continuing with this diagnostic service
check.
FRU
1 Operator Panel Cable
2 Operator Panel Display
blank, 5 beeps, LED Off
3 Operator Panel Display
blank, 5 beeps, LED On
4 Operator Panel all
diamonds, No Beeps
5 Operator Panel all
diamonds, 5 Beeps
"LCD Test" on page 3-8
Action
Check for proper installation of the
cable at the engine board (J1) and at
the operator panel. Check the
continuity of the operator panel
cable. If incorrect, replace the cable.
Check the voltage at J1-2 on the
engine board. It measures
approximately +5 V dc. If incorrect,
replace the engine board. If correct,
replace the operator panel assembly.
Check for ground between J1-4 and
ground. If correct, replace the
operator panel assembly. If incorrect,
replace the engine board.
Check to make sure a DIMM is not
plugged in backward. This condition
causes the printer to fail POST
displaying all diamonds on the
operator panel with no beeps.
Check the voltage at Pins J1-1, J1-3
and J1-5. The voltage measures
approximately +5 V dc. If incorrect,
replace the FRUs in the following
order:
operator panel assembly
engine board
Diagnostic Information
from
2-31