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Troubleshooting Analysis Guide (TAGs) 3-187
TAG 812: Uneven or No Fusing on Prints
Error Code: 812
Possible Causes: Wrong weight or type of paper loaded
Possible Defects: Fuser unit
Connectors or wiring
AC power supply unit
PCL board
1
Turn the printer off and unplug the power cord.
• Verify that J/P44, J/P4, J/P10, J/P11, J/P12, J/P40, J/P83, J/P91, and J/P8 are connected prop-
erly.
• Perform the every-call cleaning procedure, described in Chapter 9, “General Printer Mainte-
nance”.
• Turn the printer on.
• Run test prints.
Has the problem been resolved?
No: Continue.
Yes: Contamination or loose connectors were at fault. Turn to TAG 002: Check & Problem
Resolution.
2
Check the voltages, as outlined in Chapter 9, “General Printer Maintenance”
Are the voltages correct?
No: Replace the high voltage power supply unit, then turn to TAG 002: Check & Problem
Resolution.
Yes: Continue.
3
Have the fuser unit and developer unit with new toner cartridge been replaced
recently?
No: Continue.
Yes: Go to #6 in this TAG.
4
Replace the fuser unit.
• Run test prints.
Has the problem been resolved?
No: Reinstall the original fuser unit and continue.
Yes: Turn to TAG 002: Check & Problem Resolution.
5
Replace the developer unit and toner cartridge.
• Run test prints.
Has the problem been resolved?
No: Reinstall the original developer unit and continue.
Yes: Turn to TAG 002: Check & Problem Resolution.