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3-154 Troubleshooting Analysis Guide (TAGs)
10
Turn the printer off and unplug the power cord.
• Replace the transfer charger unit.
• Power-on-reset the printer.
• Run test prints.
Has the problem been resolved?
No: Replace the upper paper guide assembly. If this resolves the problem, turn to TAG 002:
Check & Problem Resolution. If this does not resolve the problem, replace the high volt-
age unit, then turn to TAG 002: Check & Problem Resolution.
Yes: The transfer charger unit was at fault. Turn to TAG 002: Check & Problem Resolution.
11
Open the front cover and install an interlock by-pass tool.
• Remove the photoconductor unit.
• Remove the developer unit.
• Run diagnostic test 010.
• Watch the toner motor coupling in the developer unit cavity.
Does the coupling turn?
No: Go to #20 in this TAG.
Yes: Continue.
12
Inspect the toner drive coupling on the developer unit for damage.
Is the coupling damaged?
No: Continue.
Yes: Replace the developer unit, then turn to TAG 002: Check & Problem Resolution.
13
Rotate both the drive couplings on the developer unit clockwise.
Do both drive couplings rotate freely?
No: Replace the developer unit, then turn to TAG 002: Check & Problem Resolution.
Yes: Continue.
14
Reinstall the photoconductor unit.
• Run diagnostic test 009.
• Watch the developer drive coupling in the developer cavity.
Does the coupling turn?
No: Repair or replace the main drive gear assembly, then turn to TAG 002: Check & Problem
Resolution.
Yes: Continue.