Lexmark X543 - Operator Panel Display Blank, Printer Beeps Five Times and Pauses

2-46 Service Manual
7525-xxx
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Operator panel display blank, printer beeps five times and pauses
2
Turn the printer off, and remove the rear
shield. See “Rear shield removal” on
page 4-7. Disconnect the operator panel
assembly cable at JOPP1 on the controller
board. Turn on the printer, and verify the
following voltages:
Are the voltage values approximately correct?
Go to step 3. Replace the controller
board. See “Controller
board removal” on
page 4-18.
3
Check continuity of the operator panel
assembly cable.
Is there continuity?
Replace the operator panel
assembly. See “Operator
panel removal” on
page 4-103.
Replace the operator panel
cable. See “Op panel
cable” on page 4-106
Step Questions / actions Yes No
1 Turn off the printer, and remove the rear
shield. See “Rear shield removal” on
page 4-7. Disconnect the cable at JOPP1 on
the controller board. Verify the following
values:
Are all these values approximately correct?
Go to step 2. Replace the controller
board. See “Controller
board removal” on
page 4-18.
2
Check for continuity in the operator panel
cable connector.
Do all the conductors indicate continuity?
Replace the operator panel.
See “Operator panel
removal” on page 4-103.
Replace the operator panel
cable. See “Op panel
cable” on page 4-106
Step Questions / actions Yes No
JOPP1
Pin Voltage
2 +5 V dc
4 Ground
5 +5 V dc
6 +3.3 V dc
7 Ground
JOPP1
Pin Voltage
10 V dc
2 +5 V dc
30 V dc
4 Ground
5 +5 V dc
6 +3.3 V dc
7 Ground