Ricoh MD-P1 Service Manual page 119

Color drum motor error
The LOCK signal error is detected when the EGB monitors the color drum motor state. (This
monitoring is done immediately after power-on, when the motor starts rotating, and immediately
after the motor stops.)
397
• Disconnected or defective motor harness.
• Motor slips due to excessive load
1. Check the harness from the color drum motor. Replace it if necessary.
SC 4xx (Image Transfer and Transfer Error)
ITB (Image Transfer Belt) Unit: Home Position Error
The ITB contact sensor does not detect the home position of the ITB for 5 seconds after the ITB
unit initialization has been done.
ITB (Image Transfer Belt) Unit: Contact Position Error
The ITB contact sensor does not detect the contact position of the ITB for 5 seconds after the ITB
unit has moved to the contact position.
ITB (Image Transfer Belt) Unit: No-contact Position Error
445
The ITB contact sensor does not detect the home position of the ITB for 5 seconds after the ITB
unit has moved to no-contact position.
• Defective ITB contact motor
• Defective ITB contact sensor
• Defective ITB unit
1. Replace the ITB contact motor.
2. Replace the ITB contact sensor.
3. Replace the ITB unit.
SC Conditions
3
19