Ricoh SP 3710DN - Sc 4 Xx (Image Transfer and Transfer Errors); Sc 5 Xx (Motor and Fusing Errors)

Service Call
SM 6-5 M0C3/M0C4/M0C5/M0C6/M0C7
Troubleshooting
6.2.3 SC 4XX (IMAGE TRANSFER AND TRANSFER ERRORS)
No. Type Error Name/Error Condition/Major Cause/Solution
SC491 D Bias leak
An error signal is detected for 0.2 seconds when changing the development unit.
• HVP harness damaged and short circuited
• Defective the HVP
• AIO terminal damaged and short circuited
1. Turn the power OFF and ON.
2. Replace the main board.
3. Replace the transfer roller.
4. Replace the interface harness of the HVP.
5. Replace the HVP.
6.2.4 SC 5XX (MOTOR AND FUSING ERRORS)
No. Type Error Name/Error Condition/Major Cause/Solution
SC520 D Main motor error
• The machine does not detect a main motor lock signal within 2 seconds after
the main motor started to rotate.
• The machine does not release a main motor lock signal within 2 seconds after
the main motor switched off.
• The machine detects a main motor lock signal every 100 msec. for seven
times consecutively, after the main motor started to rotate stably.
• Torque overload
• Defective main motor
• Disconnected or defective motor harness
1. Turn the power OFF and ON.
2. Replace the main motor if the torque load is normal.
3. Clean/replace the AIO and/or fusing unit if the torque load is abnormal.
4. Replace the motor harness.