Ricoh V-C3 D081 Field Service Manual page 674

3. Appendix: Service Call Conditions
3
SC440 D
SC441 D
SC442 D
SC443 D
SC445 D
96
The VdHome reading, the first step of the process control self-check, detected
that the development potential of the unexposed areas of the drum are not
within the prescribed range (-500 to -800)
• Potential sensor dirty
• Potential sensor defective
• Charge roller defective
• Charge power pack defective
• OPC defective
Image transfer power pack error: K
Image transfer power pack error: M
Image transfer power pack error: C
Image transfer power pack error: Y
An interrupt checks the status of the power pack every 10 ms. This SC is issued if the
VBCU detects a short in the power pack for K, M, C, or Y.
• Transfer belt damaged, insulation damaged
• Insulation on high voltage cable damaged
• Another hot point inside the machine has damaged insulation
• Insulation around high-voltage power supply damaged
Image transfer motor error
The control board of the ITB motor belt generated signals that indicate there is problem
with the image transfer belt motor.
• ITB motor defective
• ITB control board defective
• ITB overloaded
• Encoder strip on the edge of the ITB damaged.