HP C30 - Page 122

TAG 070: Fuser Unit Malfunction
3-68 Troubleshooting Analysis Guide (TAGs) June 1999
8 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.
9 Reinstall the fuser unit.
• Check P41-21 to P41-22 for resistance.
Is the resistance between I K
Ω
and 400 K
Ω
?
No: The new fuser unit seems to be defective. Replace it with a new fuser unit, then turn to
TAG 002: Check & Problem Resolution.
Yes: Replace the PCL board, then turn to TAG 002: Check & Problem Resolution.
10 Power-on-reset the printer.
• Check J/P10-2 for +24 Vdc during the 15 seconds following power-on-reset.
Is the voltage +24 Vdc?
No: Go to #16 in this TAG.
Yes: Continue.
11 Turn the printer off.
• Continue to check J/P10-2 for +24 Vdc.
• Power-on-reset the printer.
Does the voltage drop from +24 Vdc to 0 Vdc during the 15 seconds following the
output tray jogging test?
No: Go to #24 in this TAG.
Yes: Continue.
12 Power-on-reset the printer. Use extreme caution:
• Check J/P44-1 to J/P44-2 for at least 100 Vac during the 15 seconds following the output tray
jogging test.
Is the voltage at least 100 Vac?
No: Go to #15 in this TAG.
Yes: Continue.