- HP Printer User Manual

Troubleshooting Analysis Guide (TAGs) 3-127
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.