Specifications

No Open
Do the cooling fans turn on?
Yes No
Check the voltage at CN103-1 and CN104-1 on the main
board.
0V 24V
Replace the main board.
Replace the cooling fans.
Is the exposure lamp harness defective?
No Yes
Replace the exposure lamp harness
Is the voltage at TP111 on the main board higher than 4.2 volts in copy
mode?
No Yes
Replace the ac drive board.
Replace the main board.
1 December 1990
6-25