Operator Panel Displays All Diamonds, No Beeps; Operator Panel Displays All Diamonds, Five Beeps - Olivetti d-Color MF920 Service Manual

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 4-7. Disconnect the cable at JOPP1 on
the controller board. Verify the following
values:
Are all these values approximately correct?
2
Check for continuity in the operator panel
cable 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 4-7. Disconnect the cable at JOPP1 on
the controller board. Verify the following
values:
Are all these values approximately correct?
Check for continuity in the operator panel
2
cable connector.
Do all the conductors indicate continuity?
2-44
Service Manual
JOPP1
Pin 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
JOPP1
Pin 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 4-98.
Yes
Go to step 2.
Replace the operator panel.
See "Operator panel
removal" on page 4-98.
No
Replace the controller
board. See "Controller
board removal" on
page 4-18.
Replace the operator panel
cable. See "Op panel
cable" on page 4-101
No
Replace the controller
board. See "Controller
board removal" on
page 4-18.
Replace the operator panel
cable. See "Op panel
cable" on page 4-101
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