TAG 070: Fuser Unit Malfunction
June 1999 Troubleshooting Analysis Guide (TAGs) 3-69
13
Turn off the printer.
• Remove the fuser unit.
• Clean the contacts of connector J/P5.
• Disconnect J/P44.
• Check J44-2 to J5-4 and J44-1 to J5-1 for continuity.
Is there continuity on both?
No: Repair or replace the connectors or wiring as needed, then turn to TAG 002: Check &
Problem Resolution.
Yes: Continue.
14
Reinstall the fuser unit.
• Power-on-reset the printer.
Has the problem been resolved?
No: Replace the fuser unit, then turn to TAG 002: Check & Problem Resolution.
Yes: Cleaning the contacts resolved the problem. Turn to TAG 002: Check & Problem Resolu-
tion.
15
Power-on-reset the printer. Use extreme caution:
• Check J/P4-1 to J/P4-2 for at least 100 Vac during the 15 seconds following the output tray jog-
ging test.
Was the voltage at least 100 Vac?
No: Replace the AC power supply, then turn to TAG 002: Check & Problem Resolution.
Yes: Repair or replace the connectors or wiring from J/P4-1 to J/P44-1, or J/P4-2 to J/P44-2,
then turn to TAG 002: Check & Problem Resolution.
16
Check J/P10-1 for +24 Vdc.
Is the voltage +24 Vdc?
No: Continue.
Yes: Go to #19 in this TAG.
17
Check J/P11-1 for +24 Vdc.
Is the voltage +24 Vdc?
No: Continue.
Yes: Replace power control #2 board, then turn to TAG 002: Check & Problem Resolution.
18
Check J/P8-11 for +24 Vdc.
Is the voltage +24 Vdc?
No: Replace the DC power supply unit, then turn to TAG 002: Check & Problem Resolution.
Yes: Repair or replace the connectors or wiring from P11-1 to P8-11, then turn to TAG 002:
Check & Problem Resolution.
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