Troubleshooting Analysis Guide (TAGs) 3-133
5
Remove the lower paper size sensor assembly.
• Disconnect the circuit board from its mounting.
• Inspect the paper size sensor circuit board and mounting for contamination or damage.
Is the circuit board or mounting contaminated or damaged?
No: Continue.
Yes: Repair or replace the lower paper size sensor assembly, then turn to TAG 002: Check &
Problem Resolution.
6
Is the paper size sensing problem occurring with the upper cassette?
No: Go to #8 in this TAG.
Yes: Continue.
7
Turn the printer off and unplug the power cord.
• Disconnect J/P40 and J/P45.
• Refer to the tables at the end of this TAG.
• Check the connectors or wiring for the upper paper size sensor.
Is there a wiring problem?
No: Replace the upper paper size sensor assembly. If this resolves the problem, 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 connectors or wiring that are defective, then turn to TAG 002:
Check & Problem Resolution.
8
Turn the printer off and unplug the power cord.
• Disconnect J/P40 and J/P43.
• Refer to the table at the end of this TAG.
• Check the connectors or wiring for the lower paper size sensor.
Is there a wiring problem?
No: Replace the lower paper sensor assembly. If this resolves the problem, 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 connectors or wiring that are defective, then turn to TAG 002:
Check & Problem Resolution.
