TAG 811: Background/Residual Images/Dark Prints
June 1999 Troubleshooting Analysis Guide (TAGs) 3-181
TAG 811: Background/Residual Images/Dark Prints
Error Code: 811
Possible Causes: Contaminated toner/carrier mix
Possible Defects: Photoconductor unit
Charge corona
Cleaner unit
Developer unit
Erase lamp assembly
High voltage unit
Power control #2 board
Connectors or wiring
PCL board
Charge corona terminal assembly
Cleaner terminal assembly
1
Turn the printer off and unplug the power cord.
• Verify J/P23, J/P24, J/P85, and the charge corona high voltage lead are connected properly.
• Perform the every-call cleaning procedure, described in Chapter 9, “General Printer Mainte-
nance”.
• Clean the contacts on the charge corona.
• Clean the printhead lens and toner patch sensor located on the developer unit.
• Turn the printer on.
• Run test prints.
Has the problem been resolved?
No: Continue.
Yes: Contamination or a loose connector was 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 photoconductor unit, charge corona, cleaner unit and developer unit with
new toner cartridge been replaced recently?
No: Continue.
Yes: Go to #5 in this TAG.
4
Replace the photoconductor unit and charge corona.
• Run 200+ test prints, then evaluate the test print background.
Has the problem been resolved?
No: Reinstall the original photoconductor unit and charge corona and continue.
Yes: Turn to TAG 002: Check & Problem Resolution.
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