HP C30 manual TAG 071 Open Fuser Thermistor, Is error code 071 displayed during power-on-reset?

TAG 071: Open Fuser Thermistor

Error Code: 071

Possible Defects: Connectors or wiring

Fuser unit

PCL board

1 Turn the printer off and unplug the power cord.

•Make sure the fuser unit is installed properly.

•Confirm that J/P41 and J/P44 are connected properly.

Has the fuser unit been replaced recently?

No: Continue.

Yes: Go to #3 in this TAG.

2 Replace the fuser unit.

•Power-on-reset the printer.

Is error code 071 displayed during power-on-reset?

No: The fuser unit was at fault. Turn to TAG 002: Check & Problem Resolution.

Yes: Reinstall the original fuser unit and continue.

3 Turn the printer off and unplug the power cord.

•Disconnect J/P41.

•Remove the fuser unit.

•Check P41-21 to P5-7 and P41-22 to P5-6 for continuity.

Is there continuity on both?

No: Repair or replace the connectors or wiring as necessary, then turn to TAG 002: Check & Problem Resolution.

Yes: Continue.

4 Check P41-21 and P41-22 for continuity to ground.

Is there continuity to ground on either?

No: Replace the fuser unit. If this resolves the problem, then 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 that have continuity to ground: P41-21 to P44-2,

J44-2 to P5-7, or

P41-22 to P44-1, J44-1 to P5-6;

then turn to TAG 002: Check & Problem Resolution.

3-72 Troubleshooting Analysis Guide (TAGs)