HP C30 - Page 241

TAG 812: Uneven or No Fusing on Prints
June 1999 Troubleshooting Analysis Guide (TAGs) 3-187
6 Power-on-reset the printer.
• Watch through the output tray opening to see if the fuser lamp comes on.
Does the lamp light within 1.5 minutes?
No: Go to TAG 070: Fuser Unit Malfunction.
Yes: Continue.
7 Run test prints.
Does the print seem to be excessively dark or do the characters feel raised on the
paper?
No: Continue.
Yes: Go to TAG 808: Prints Overtoned/Dark Vertical Streaks.
8 Confirm that the paper in the cassettes meets paper specifications, outlined in the Guide to Opera-
tions manual.
Is the paper within specification?
No: Do not use this paper. Turn to TAG 002: Check & Problem Resolution.
Yes: Continue.
9 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.
10 Check P41-21 to P5-7 for continuity.
Is there continuity?
No: Repair or replace the connectors or wiring from P41-21 to P83-2, or J83-2 to P5-7, then
turn to TAG 002: Check & Problem Resolution.
Yes: Continue.
11 Reinstall the fuser unit.
• Check P41-21 to P41-22 for resistance.
Is the resistance between I KΩ and 400 KΩ?
No: Replace the fuser unit. If this resolves the problem, turn to TAG 002: Check & Problem
Resolution. If this does not resolve the problem, replace the PCL board, then turn to TAG
002: Check & Problem Resolution.
Yes: Replace the PCL board, then turn to TAG 002: Check & Problem Resolution.