Operator Panel Displays All Diamonds, No Beeps; Operator Panel Displays All Diamonds, Five Beeps - Lexmark X543 Series Service Manual

7525-xxx

Operator panel displays all diamonds, no beeps

Step Questions / actions
1 Turn off the printer, and remove the rear shield.
See "Rear shield removal" on page
Disconnect the cable at JOPP1 on the
controller board. Verify the following values:
Pin
Are all these values approximately correct?
Check for continuity in the operator panel cable
2
connector.
Do all the conductors indicate continuity?

Operator panel displays all diamonds, five beeps

Step Questions / actions
1 Turn off the printer, and remove the rear shield.
See "Rear shield removal" on page
Disconnect the cable at JOPP1 on the
controller board. Verify the following values:
Pin
Are all these values approximately correct?
2 Check for continuity in the operator panel cable
connector.
Do all the conductors indicate continuity?
2-46
Service Manual
4-7.
JOPP1
Voltage
1 0 V dc
2 +5 V dc
3 0 V dc
4 Ground
5 +5 V dc
6 +3.3 V dc
7 Ground
4-7.
JOPP1
Voltage
1 0 V dc
2 +5 V dc
3 0 V dc
4 Ground
5 +5 V dc
6 +3.3 V dc
7 Ground
Yes
Go to step 2.
Replace the operator panel.
See "Operator panel
removal" on page 4-77.
Yes
Go to step 2.
Replace the operator panel.
See "Operator panel
removal" on page 4-77.
No
Replace the controller
board. See "Controller
board removal" on
page 4-16.
Replace the operator panel
cable. See "Op panel
cable" on page 4-80
No
Replace the controller
board. See "Controller
board removal" on
page 4-16.
Replace the operator panel
cable. See "Op panel
cable" on page 4-80