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3-118 Troubleshooting Analysis Guide (TAGs)
TAG 600: AC Power Malfunction
Error Code: 600
Symptoms: Operator panel blank with fans not running
Printer Open indicator on
Circuit breaker keeps tripping
Possible Defects: Upper fuse in the AC power supply
AC power supply unit
DC power supply unit
Connectors or wiring
Power control #2 board
Power control #3 board
Fuser unit
Back cover interlock switch
Front cover interlock switch
Top cover interlock switch
Toner supply motor
Cooling fans
Jogging motor
Main drive motor
Vacuum transport unit
Operator panel assembly
1
Turn the printer off and unplug the power cord.
• Verify that J/P44, J/P84, J/P4, J/P9, J/P12, J/P40, J/P6, and the AC power cord are connected
properly.
• Power-on-reset the printer.
Has the problem been resolved?
No: Continue.
Yes: Loose connectors were at fault. Turn to TAG 002: Check & Problem Resolution.
2
Turn the printer off.
• Open the back cover and install an interlock by-pass tool.
• Turn the printer on. Use extreme caution:
• Check from J/P9-2 to J/P9-1 for +100 Vac.
Is the voltage +100 Vac?
No: Go to #4 in this TAG.
Yes: Continue.
3
Turn the printer off and unplug the power cord.
• Disconnect J/P40 and J/P12.
• Check P40-29 to P12-3 and P40-30 to P12-4 for continuity.
Is there continuity on each?
No: Repair or replace the connectors or wiring as needed.
Yes: Replace the power control #2 board. 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.