Control Panel Service Check - Konica Minolta bizhub 4020 Service Manual

4.7.4

Control panel service check

Warning—Potential Damage: Do not replace the control panel and controller board at the same time.
Each board contains the printer settings. When either of these boards is new, it obtains some of the
settings from the other board. Settings are lost when both are new and replaced at the same time.
Action
Step 1
Check the conections on the Control panel board and controller
board for proper connections.
Are they properly connected?
Step 2
Properly connect the connectors.
Did this fix the problem?
Step 3
Is the display blank but the LEDs on the panel are functioning?
Step 4
Replace the display. See
Does the error remain?
Step 5
Replace the cable connecting the Control panel board to the
controller board.
Does the error remain?
Step 6
Replace the Control panel board. See
removal.
Does the error remain?
Step 7
Replace the controller board. See
Does the error remain?
bizhub 4020/3320 Service Manual
Display removal (bizhub 4020).
Control panel board
Controller board removal.
Yes
Go to step 3.
The problem is
solved.
Go to step 4.
Go to step 5.
Go to step 6.
Go to step 7.
Contact the next
level of support.
- 150 -
No
Go to step 2.
Go to step 3.
Go to step 5.
The problem is
solved.
The problem is
solved.
The problem is
solved.
The problem is
solved.