Ricoh V-C3 D081 Field Service Manual page 672

3. Appendix: Service Call Conditions
SC418 C
3
SC420 C
SC421 C
SC422 C
SC423 C
SC424 C
SC425 C
SC426 C
94
LED error during Vsg adjustment
PWM value: Ifsg>3000
This means one or more of the following sensors is not functioning correctly:
• ITB encoder sensor
• ID sensor
• MUSIC sensors
• ID sensor dirty
• ID sensor defective
Note:
• This error can occur as a result of cleaning the sensors with a dry cloth, which
can cause a static charge to build up on the sensor and attract particles of
paper dust.
• Always clean these with a clean cloth moistened with alcohol as described in
the PM table.
Potential sensor error: Vd Adjustment K
Potential sensor error: Vd Adjustment M
Potential sensor error: Vd Adjustment C
Potential sensor error: Vd Adjustment Y
The development potential of the drum before exposure (Vd) cannot be adjusted to
within ±8 V of the target voltage (-900V).
• Drum potential sensor harness, connector is loose, broken, defective
• Drum potential sensor dirty
• Drum potential sensor defective
• Drum connector, harness loose, broken, defective
• Development power pack defective
• VBCU defective
Potential sensor error 5: Vl adjustment K
Potential sensor error 6: Vl adjustment M
Potential sensor error 7: Vl adjustment C