Sharp AR-651 Service Handbook page 280

Defective area
Main charger wire
Fuser roller, separation fin-
ger and thermistor
Cleaning roller for
pressure roller
High-voltage transformer
(main charger)
Drum
Scanner carriage
AR-651/810 TROUBLESHOOTING
Step Check Items
1 Is the charger wire dirty or deformed?
2 Are the fuser roller, separation finger and
thermistor dirty?
3 Has the cleaning roller for the pressure
roller reached its PM life?
4 Is the output from the high-voltage trans-
former normal?
5 Is there a deep scratch on the drum sur-
face?
6 Are there thin scratches (drum pitting) on
the drum surface?
7 Is there a foreign object on the carriage
rail?
Clean or replace the charger wire.
Clean them.
Replace it.
Check the circuit and replace the high-voltage
transformer if it is defective.
Replace the drum if the scratch has reached the
aluminum base.
Check and adjust the contact condition of the
cleaning blade and recovery blade.
Remove the foreign object.
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