Dead Machine Service Check; Controller Board Service Check - Konica Minolta Bizhub 4700P Service Manual

Symptom
Print job not printing on network
attached printer
Network attached printer offline
4.7.2

Dead machine service check

Action
Step 1
Check if the power supply cable is properly connected
to the controller board.
Are they properly connected?
Step 2
1. Turn off the printer.
2. Remove the power cord.
3. Measure the resistance between terminals A and
D of the power supply socket.
Is the resistance approximately 30 ohms?
4.7.3

Controller board service check

Service checks which involve measuring voltages on the power supply should be performed with the
printer positioned on its rear side.
Note: When making voltage readings, always use frame ground unless another ground is specified.
See the wiring diagram in the back of the book for more information.
Warning—Potential Damage: Do not replace the control panel and controller board at the same time.
Each card contains the printer settings. When either of these cards is new, it obtains some of the
settings from the other card. Settings are lost when both are new and replaced at the same time.
Action
Step 1
POR the machine.
Did the control panel , fuser, fan and drive motor
function at startup?
bizhub 4700P/bizhub 4000P Service Manual
Action
Go to Network service
- 130 -
check.
Yes
Go to step 2.
Go to Controller board
service check
Yes
Go to step 2.
No
Reseat the cables.
Replace the power
supply. See Power supply
removal.
No
Go to step 3.