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2-64 Service Manual
5016-001
Operator Panel Service Check
The printer detects a problem with the operator panel assembly,
operator panel cable, interconnect board or controller board, when a
POR does not complete and the printer emits 5 beeps.
If the operator panel operates properly, except for a PEL or a few
PELs missing or broken, run the “LCD Test” on page 3-10, before
continuing with this service check.
FRU Action
1 Operator Panel
Cable
Check for proper installation of the cable at J1
on the interconnect board.
• If correctly installed, check the continuity of
the cable.
• If incorrect, replace the cable.
2 Operator Panel
Display Blank,
5 Beeps and
LED Off
Verify the voltage at J1-2 on the interconnect
board measures approximately +5 V dc.
• If incorrect, replace the interconnect board.
• If correct, replace the operator panel
assembly.
3 Operator Panel
Display Blank,
5 Beeps and
LED On
Verify the connection between J1-4 on the
interconnect and ground measures
approximately 0 ohms.
• If incorrect, replace the interconnect board.
• If correct, replace the operator panel
assembly.
4 Operator Panel all
Diamonds and
No beeps
Verify any memory DIMMs and the COS SIMM
are not plugged in backward, or improperly
installed.
Check the controller board for correct
installation.
• If no problem found, replace the COS SIMM.
• If this does not fix the problem, replace the
controller board.