Ricoh V-C3 D081, Field Service Manual, Page: 678 / 1092

SC490 C
MUSIC sensor error
One or more of the MUSIC sensors is not functioning normally.
• MUSIC sensor harness loose, broken, defective
• Sensor defective
SC495 D
ITB encoder sensor error
The ITB encoder sensor that reads the encoded strip on the ITB is not functioning
properly.
• Sensor dirty
• Sensor harness loose, broken, defective
• Sensor out of position because installed incorrectly
• ITB installed incorrectly
SC496 C
MUSIC sensor error
The MUSIC sensor detected an abnormal pattern on the ITB because:
• ADC exceeded upper or lower limit.
• The pattern used to calculate the amount of skew is abnormal.
• The reading of the pattern exceeded the length of time the LED projected light.
• LED light could not be adjusted correctly.
• ITB installed incorrectly
• Inspect ITB belt for damage, replace
• MUSIC pattern abnormal; do a forced process control (SP3821) and check the
result.
• MUSIC sensor defective or disconnected
SC497 C
Temperature and humidity sensor error: M PCU
The thermistor output of the temperature and humidity sensor above the M PCU was
not within the prescribed range (0.5V to 4.2V)
• Temperature and humidity sensor harness disconnected, loose, defective
• Temperature and humidity sensor defective
3. Appendix: Service Call Conditions
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