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SC 670 - Engine response error. After powerig on the copier machine,a respons is not received from the engine .possible defect controller board or SBCU installed incorrectly.Try reset the code to turn ON/OFF the main power switch.
This is a 'fuser" warm up error. You could have a blown out heater lamp, or fuse, but most often this is caused by a power fluctuation. The reset for this is done by simply entering the service mode, and turning the machine of/on with the main power (red button). enter service mode as follows: "Clear Modes" " 1, 0, 7 " then hold "Clear/Stop" for 2-3 seconds. The display will change with "service mode" in the top corner. Now turn power off/ on (red switch) ** Never go further into the service mode, as you can cause all kinds of difficulty. If the code comes back, then you will have to get a technician on site to troubleshoot the fuser.
SC411: Separation bias leak error
A separation bias leak signal is detected.
- Possible causes -
• High voltage supply board defective
• Poor connection of the PCU
• Discharge plate defective
Usually a 410 would be in the same ballpark on a Ricoh computer. Unfortunately I don't have the service manuals for 4500 series machines. If you can get a hold of a Ricoh tech in your area, it would be a good idea to rest the power supply and check the pcu as well.
422 D PCC leak
- Timing & Condition -
When the current leak is detected
for 2 seconds, leak detection
starts 1 second after the PCC
turns on. The leak signal is
monitored twice at 1-second
intervals. When the leak condition
is detected twice continuously,
this SC is displayed.
1. Check if the PCC unit is properly installed.
2. Replace the corona wire if it is broken.
3. Check if the connectors on the terminal and
high voltage supply board (T1, PCC) are
properly connected and if the cables are
4. Clean the receptacle.
5. Replace the high voltage supply board (T1,
6. Replace the I/O control board.
7. Replace the main control board.
- Signals to Check -
Leak Detection: CN227-B1 on I/O control
Leak Detection: CN221-B1 on I/O control