Konica Minolta bizhub 4020 Service Manual page 150

Action
Step 9
Is the LED on the bottom of the board illuminating?
Step 10
Verify the controller board power outputs. See
voltages from the controller.
Are the voltages correct?
bizhub 4020/3320 Service Manual
Controller board for
- 149 -
Yes No
Go to step 10. Replace the
controller board. Go
to
removal.
Contact the next level Replace the
of support. controller board. Go
to
removal.
Controller board
Controller board