Specifications

1.10 BLACK SPOTS ON THE COPY IMAGE
- Phenomenon -
1. The grid voltage is not applied correctly.
• Poor contact between charge corona casing
and grid spring
• CC/G/B power pack defective
• Main board defective
- Action -
Is there a good electrical contact between the charge corona casing and
the grid spring?
Yes No
Repair the poor contact and/or replace any parts if needed.
Check the voltage at CN112-1 on the main board.
0V Not 0V
Replace the main board.
Replace the CC/G/B power pack.
1 December 1990
6-14