Ricoh D143 Field Service Manual page 800

6. Troubleshooting
No. Type
-03 C
-04 C
No. Type
396
D
-01
-02 D
-03 D
-04 D
798
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Drum gear position sensor error: M
Drum gear position sensor error: Y
The machine does not detect the drum position signal for 3 seconds at the drum
phase adjustment.
• Dirty or defective drum gear position sensor
1. Clean the drum gear position sensor.
2. Check the harness connection.
3. Replace the drum gear position sensor.
4. Replace the PCDU.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Drum/Development motor error: K
Drum/Development motor error: C
Drum/Development motor error: M
Drum/Development motor error: Y
The machine detects a High signal from the drum/development motor for 2
seconds after the drum/development motor turned on.
• Overload on the drum/development motor
• Defective drum/development motor
• Defective harness
• Shorted 24 V fuse on the PSU
• Defective interlock system
1. Check or replace the harness.
2. Replace the drum/development motor.
3. Replace the 24V fuse on the PSU.