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3-172 Troubleshooting Analysis Guide (TAGs)
TAG 808: Prints Overtoned/Dark Vertical Streaks
Error Code: 808
Possible Causes: Clogged cleaner
Contaminated toner/carrier mix
Possible Defects: Cleaner unit
Photoconductor unit
Main charger
High voltage unit
Power control #2 board
PCL board
Connectors or wiring
Developer unit
Overtoned print and dark print problems are very similar. If this TAG does not resolve the
problem, go to TAG 811: Background/Residual Images/Dark Prints.
1
Turn the printer off and unplug the power cord.
• Verify that J/P23, J/P12, J/P25, and J/P41 are connected properly.
• Perform the every-call cleaning procedure, described in Chapter 9, “General Printer Mainte-
nance”.
• Power-on-reset the printer.
• 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 photoconductor unit, main charger, cleaner unit, and developer unit with
toner cartridge been replaced recently?
No: Continue.
Yes: Go to #7 in this TAG.
4
Replace the photoconductor unit and main charger.
• Run test prints.
Has the problem been resolved?
No: Reinstall the original photoconductor unit and main charger, then continue.
Yes: Run at least 200 test prints to detone the printer’s engine, then turn to TAG 002: Check &
Problem Resolution.