3-120 Troubleshooting Analysis Guide (TAGs)
10
Reinstall the fuse.
• Disconnect J/P4.
• Close the top cover.
• Check P4-5 to P4-6 for continuity.
Is there continuity?
No: Go to #34 in this TAG.
Yes: Continue.
11
Remove the AC power supply unit.
• Operate the front cover interlock switch.
• Check for continuity as you operate the front interlock switch.
Does the front cover interlock switch have continuity?
No: Repair or replace the front interlock switch, then turn to TAG 002: Check & Problem
Resolution.
Yes: Repair or replace the AC power supply unit, then turn to TAG 002: Check & Problem
Resolution.
12
Disconnect J/P13.
• Install a new upper fuse in the AC power supply unit.
• Run diagnostic test 010 for approximately 5 seconds, then stop.
• Remove the fuse.
• Check the fuse for continuity.
Does the fuse have continuity?
No: Replace the power control #2 board, then turn to TAG 002: Check & Problem Resolu-
tion.
Yes: Continue.
13
Disconnect J/P18.
• Check P13-5 to P18-1 for continuity to ground.
Is there continuity to ground?
No: Replace the toner supply motor, then turn to TAG 002: Check & Problem Resolution.
Yes: Repair or replace the connectors or wiring from P18-1 to P13-5, then turn to TAG 002:
Check & Problem Resolution.
14
Turn off the printer.
• Disconnect J/P9.
• Install a new upper fuse in the AC power supply unit.
• Turn the printer on for 5 seconds, then off.
• Remove the upper fuse.
• Check the fuse for continuity.
Does the fuse have continuity?
No: Go to #20 in this TAG.
Yes: Continue.
