Konica-Minolta bizhub 4000i
Troubleshooting. Toner and Drum Problems
New toner is not detected
User Check
- Check that the packaged toner cartridge is not set.
- Check that a new (not used) toner cartridge is set.
- Check that the genuine toner cartridge is set.
Step | Cause | Remedy |
---|---|---|
1 | New toner actuator coming off | Reattach the new toner actuator. |
2 | Connection failure of the relay front harness | Reconnect the relay front harness. |
3 | Relay front PCB failure | Replace the relay front PCB ASSY. |
4 | Main PCB failure | Replace the main PCB ASSY. |
Toner cartridge cannot be recognized
User Check
- Set the toner cartridge correctly.
- Replace the toner cartridge with a new one.
Step | Cause | Remedy |
---|---|---|
1 | Toner amount detection sensor PCB (light reception) failure | Replace the toner amount detection sensor PCB ASSY (light reception). |
2 | Relay front PCB failure | Replace the relay front PCB ASSY. |
3 | Main PCB failure | Replace the main PCB ASSY. |
Error message prompting toner cartridge replacement does not disappear
User Check
- Check that a new (not used) toner cartridge is set.
- Check that the genuine toner cartridge is set.
Step | Cause | Remedy |
---|---|---|
1 | New toner actuator coming off | Reattach the new toner actuator. |
2 | Connection failure of the relay front harness | Reconnect the relay front harness. |
3 | Relay front PCB failure | Replace the relay front PCB ASSY. |
4 | Main PCB failure | Replace the main PCB ASSY. |
Drum error
User Check
- Clean the corona wire of the drum unit.
- Replace the drum unit with a new one.
Step | Cause | Remedy |
---|---|---|
1 | Dirt on the electrodes of the drum unit and those of the machine | Clean the electrodes of the drum unit and those of the machine. |
2 | Dirt on the high-voltage power supply PCB terminal | Clean the electrodes of the machine. |
3 | High-voltage power supply PCB failure | Replace the high-voltage power supply PCB ASSY. |
4 | Main PCB failure | Replace the main PCB ASSY. |
Error message prompting drum replacement does not disappear
User Check
- Reset the drum counter according to the manual.
Step | Cause | Remedy |
---|---|---|
1 | Main PCB failure | Replace the main PCB ASSY. |