Ricoh SP 8400DN Field Service Manual page 1318

6.Troubleshooting
SC No. Type
2.
3.
4.
SC727- B The power supply for the sensor is defective.
72
The power supply for the sensor (5V_SN) is defective.
This is displayed as an SC code from its initial detection.
•
•
•
Turn the main power OFF then ON after checking whether there are no foreign objects (such
as remaining paper) in the tray. If the SC occurs again, do the following steps. Check if the
SC reoccurs by cycling the power after each step.
1.
2.
3.
4.
5.
SC No. Type
SC745 Mail Box CS3010 Error
SC745- D Protection Device Intercept Error 1
03
Protection device intercept error state (fuse break) is detected.
•
•
•
SC745- D Protection Device Intercept Error 2
04
Protection device intercept error state (fuse2 break) is detected.
•
•
•
SC745- D The entrance fan motor lock is detected.
80
580
Error Name/Error Condition/Major Cause/Solution
securely. Reconnect the connectors if they are disconnected, or loose.
Replace the harness if it is disconnected, or damaged.
Check if the motor runs, has no overloads, and is properly driven. Replace the parts if
there are any defects.
Check if there are any signs of a short circuit. Replace the parts if there are any defects.
Sensor harness entrapped (short circuit or breaking of wire)
Sensor defective
Controller board defective
Check if the harness is connected to the wrong sensor. Reconnect the connector if there
are any defects.
Replace the harness if it is disconnected, or damaged.
Check if the sensor turns OFF/ON. Replace the parts if there are any defects.
Check if the motor runs, has no overloads, and is properly driven. Replace the parts if
there are any defects.
Check if there are any signs of a short circuit. Replace the parts if there are any defects.
Error Name/Error Condition/Major Cause/Solution
Harness short-circuit
Motor defective
Solenoid defective
Harness short-circuit
Motor defective
Solenoid defective