TAG 804: Prints With Light Horizontal Bands
June 1999 Troubleshooting Analysis Guide (TAGs) 3-161
TAG 804: Prints With Light Horizontal Bands
Error Code: 804
Possible Causes: Loose printhead connectors
Possible Defects: Transfer corona unit
Photoconductor unit
Charge corona
1
Turn the printer off and unplug the power cord.
• Perform the every-call cleaning procedure, described in Chapter 9, “General Printer Mainte-
nance”.
• Verify that J/P30 and J/P31 are connected properly.
• 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 photoconductor unit and charge corona have been replaced recently?
No: Continue.
Yes: Go to #5 in this TAG.
No: Replace the photoconductor unit and charge corona.
Yes: Turn on the printer.
4
Run test prints.
Has the problem been resolved?
No: Reinstall the original photoconductor unit and charge corona, then continue.
Yes: Turn to TAG 002: Check & Problem Resolution.
5
Replace the transfer corona unit.
Has the problem been resolved?
No: Replace the photoconductor unit. If this resolves the problem, turn to TAG 002: Check &
Problem Resolution. If this does not resolve the problem, refer to the Chapter 4, “Print
Quality Samples”. Compare the test prints with the print samples, and identify a sample
having the same print flaw as the test prints; turn to the TAG listed under the sample.
Yes: Turn to TAG 002: Check & Problem Resolution.
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