HP C30 - Page 217

TAG 805: Black Prints
June 1999 Troubleshooting Analysis Guide (TAGs) 3-163
5 Replace the developer unit, toner cartridge, and cleaner unit.
• Turn the printer on.
• Run test prints.
Has the problem been resolved?
No: Reinstall the original developer unit and cleaner unit, then continue.
Yes: Turn to TAG 002: Check & Problem Resolution. If the problem recurs, the toner/carrier
mix may be old or contaminated.
6 Turn the printer off and unplug the power cord.
• Disconnect J/P41, J/P23, and J/P24.
• Check P41-33 to P23-7 for continuity.
Is there continuity?
No: Repair or replace the connectors or wiring from P41-33 to P23-7, then turn to TAG 002:
Check & Problem Resolution.
Yes: Continue.
7 Check P41-30 to P24-4 for continuity.
Is there continuity?
No: Repair or replace the connectors or wiring from P41-30 to P24-4.
Yes: Continue.
8 Replace the charge corona terminal assembly.
• Run test prints.
Has the problem been resolved?
No: Continue.
Yes: Turn to TAG 002: Check & Problem Resolution.
9 Replace the high voltage unit.
• Run test prints.
Has the problem been resolved?
No: Reinstall the original high voltage unit and continue.
Yes: Turn to TAG 002: Check & Problem Resolution.
10 Replace the printhead assembly.
• Run test prints.
Has the problem been resolved?
No: Reinstall the original printhead assembly and continue.
Yes: Turn to TAG 002: Check & Problem Resolution.