5 Replace the cleaner unit.

Run test prints.

Has the problem been resolved?

No: Reinstall the original cleaner unit and continue.

Yes: Turn to TAG 002: Check & Problem Resolution.

6 Replace the developer unit with toner cartridge.

Run test prints.

Has the problem been resolved?

No: Reinstall the original developer unit and continue.

Yes: Turn to TAG 002: Check & Problem Resolution. If the problem recurs, the toner/carrier mix may be old or contaminated.

7 Turn the printer off.

Open the front cover and install an interlock by-pass tool.

Remove the developer unit.

Power-on-reset the printer.

Watch the toner motor coupling at the rear of the developer cavity.

Does the coupling turn continuously?

No: Go to #10 in this TAG.

Yes: Continue.

8 Check TP3-31 for 0 Vdc.

Is the voltage 0 Vdc?

No: Replace the power control #2 board, then turn to TAG 002: Check & Problem Resolution .

Yes: Continue.

9 Turn off the printer and unplug the power cord.

Disconnect J/P12 and J/P40.

Check P40-31 to P12-5 for continuity.

Is there continuity?

No: Repair or replace the connectors or wiring from P40-31 to P12-5, then turn to TAG 002: Check & Problem Resolution.

Yes: Replace the power control #2 board. If this resolves the problem, turn to TAG 002: Check

&Problem Resolution. If this doesn’t resolve the problem, replace the PCL board, then turn to TAG 002: Check & Problem Resolution.

Troubleshooting Analysis Guide (TAGs)

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