3

Clear the paper path.

•Remove the upper cassette.

•Power-on-reset the printer.

•Run test prints from the lower cassette.

Is error code 021 displayed?

No: Go to #10 in this TAG.

Yes: Continue.

4 Clear the paper path.

•Inspect the paper timing sensor actuator for damage or binding.

Is it in good working order?

No: Replace the paper timing guide assembly, then turn to TAG 002: Check & Problem Resolution .

Yes: Continue.

5 Check the voltage between TP3-16 and ground on the PCL board.

•With the printer powered on, press and release the paper timing sensor.

•Check for a voltage change from 0 Vdc to +12 Vdc.

Does the voltage change from 0 Vdc to +12 Vdc?

No: Go to #9 in this TAG.

Yes: Continue.

6 Check TP3-11 for +24 Vdc.

Is the voltage +24 Vdc?

No: Continue.

Yes: Return to the beginning of this TAG.

7 Check J/P91-1 for +24 Vdc.

Is the voltage +24 Vdc?

No: Continue.

Yes: Replace the PCL board, then turn to TAG 002: Check & Problem Resolution.

8 Check J/P8-13 for +24 Vdc.

Is the voltage +24 Vdc?

No: Replace the DC power supply, then turn to TAG 002: Check & Problem Resolution.

Yes: Repair or replace the connectors or wiring from P91-1 to P8-13, then turn to TAG 002: Check & Problem Resolution.

Troubleshooting Analysis Guide (TAGs)

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