Black Spots On The Copy Image - Ricoh A151 Field Service Manual

1.10 BLACK SPOTS ON THE COPY IMAGE

- Problem -
The grid voltage is not applied correctly.
Poor contact between the charge corona casing
•
and grid plate
CC/G/B power pack defective
•
Main board defective
•
- Action -
Is there good electrical contact between the charge corona casing and the
grid plate?
Yes No
Repair the poor contact and replace any parts if needed.
Check the voltage at CN119-1 on the main board.
0 volts Not 0 volts
Replace the main board.
Replace the CC/G/B power pack.
A151/A152 6-14 FSM