HP C30 manual Does the fuser lamp light?, Is the voltage approximately +5 Vdc?

4 Power-on-reset the printer.

•Watch through the output tray opening to see if the fuser lamp comes on during the 15 seconds following the output tray jogging test.

•If the fuser lamp comes on immediately after power on, turn the printer off and replace the AC power supply.

Does the fuser lamp light?

No: Go to #10 in this TAG.

Yes: Continue.

5 Read this entire step before taking any action.

•Power-on-reset the printer.

•Check the voltage between TP4-21 and ground on the PCL board for a voltage increase during the 15 seconds following the output tray jogging test.

Caution

If the voltage does not increase within 15 seconds, turn the printer off immediately or additional damage may occur.

Did the voltage remain constant for 15 seconds after the output tray jogging test?

No: Replace the PCL board, then turn to TAG 002: Check & Problem Resolution.

Yes: Continue.

6 Check TP4-22 on the PCL board for +5 Vdc.

Caution

Do not allow the printer to remain on for more than five seconds or additional damage may occur.

Is the voltage approximately +5 Vdc?

No: Replace the PCL board, then turn to TAG 002: Check & Problem Resolution.

Yes: Continue.

7 Turn the printer off and unplug the power cord.

•Remove the fuser unit.

•Disconnect J/P41.

•Check P41-22 to P5-6 for continuity.

Is there continuity?

No: Repair or replace the connectors or wiring from P41-22 to P83-1 or J83-1 to P5-6, then turn to TAG 002: Check & Problem Resolution.

Yes: Continue.

3-68 Troubleshooting Analysis Guide (TAGs)