HP C30 manual Is there an open or short to ground continuity?

13 Check P41-6 to P42-15 for continuity to ground.

Is there continuity?

No: Replace the operator panel. If this resolves the problem, turn to TAG 002: Check & Prob- lem Resolution. If this does not resolve the problem, replace the PCL board, then turn to TAG 002: Check & Problem Resolution.

Yes: Repair or replace the connectors or wiring from P42-15 to J/P90-15 toP41-6, then turn to TAG 002: Check & Problem Resolution.

14 Turn the printer off and unplug the power cord.

•Disconnect J/P41 and J/P42.

•Check P41-18 to P42-3 for continuity to ground.

Is there continuity?

No: Continue.

Yes: Repair or replace the connectors or wiring from P41-18 to J/P90-3 to P42-3, then turn to TAG 002: Check & Problem Resolution.

15 Check P41-18 to P42-3 for continuity.

Is there continuity?

No: Repair or replace the connectors or wiring from P41-18 to J/P90-3 to P42-3, then turn to TAG 002: Check & Problem Resolution.

Yes: Replace the operator panel. If this resolves the problem, turn to TAG 002: Check & Prob- lem Resolution. If this does not resolve the problem, replace the PCL board, then turn to TAG 002: Check & Problem Resolution.

16 Run diagnostic test 001.

•Note which status lights come on and what is displayed each time the tone sounds. Some of the status lights may be very dim.

•Refer to the table at the end of this TAG.

Is the combination of lights and display you noted identified in the table?

No: Replace the operator panel. If this resolves the problem, then turn to TAG 002: Check & Problem Resolution. If this does not resolve the problem, replace the PCL board, then turn to TAG 002: Check & Problem Resolution.

Yes: Continue.

17 Turn the printer off and unplug the power cord.

•Disconnect J/P41 and J/P42.

•Check the wiring indicated on the table below.

Is there an open or short to ground continuity?

No: Replace the operator panel. If this resolves the problem, then turn to TAG 002: Check & Problem Resolution. If this does not resolve the problem, replace the PCL board, then turn to TAG 002: Check & Problem Resolution.

Yes: Repair or replace the defective connectors or wiring, then turn to TAG 002: Check & Problem Resolution.

Troubleshooting Analysis Guide (TAGs) 3-127