HP C30 - Page 127

TAG 072: Fuser Unit Temperature Too High
June 1999 Troubleshooting Analysis Guide (TAGs) 3-73
5 Turn the printer off and unplug the power cord.
• Disconnect J/P41.
• Check P41-21 for continuity to ground.
Is there continuity?
No: Continue.
Yes: Repair or replace the connectors or wiring that have continuity to ground:
P41-21 to P44-2, or J44-2 to P5-7; then turn to TAG 002: Check & Problem Resolution.
6 Check P41-21 to P41-22 for resistance.
Is the resistance at least 1K‡WW?
No: Continue.
Yes: Replace the PCL board, then turn to TAG 002: Check & Problem Resolution.
7 Remove the fuser unit.
• Check P41-21 to P5-7 for resistance.
Is there resistance?
No: Continue.
Yes: Repair or replace the connectors or wiring that have resistance:
P41-21 to P44-2, or J44-2 to P5-7; then turn to TAG 002: Check & Problem Resolution.
8 Check P41-22 to P5-6 for resistance.
Is there resistance?
No: Replace the fuser unit, then turn to TAG 002: Check & Problem Resolution.
Yes: Repair or replace the connectors or wiring that have resistance: P41-22 to P44-1, or J44-1
to P5-6; then turn to TAG 002: Check & Problem Resolution.