Ricoh B132 - Page 445

SERVICE CALL CONDITIONS
SM 4-45 B132/B200
MUSIC sensor error
SC496 C
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
.
• MUSIC sensor defective or disconnected
• MUSIC pattern abnormal; do a forced
process control (SP3821) and check the
result (section 4.2.4).
Temperature and humidity sensor error 1: PCU
SC497 C
The thermistor output of the
temperature and humidity
sensor above the black 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
Temperature and humidity sensor error 2
SC498 C
The thermistor output of the
temperature and humidity
sensor at below the waste toner
bottle was not within the
prescribed range (0.5V to 4.2V)
• Temperature and humidity sensor
harness disconnected, loose, defective
• Temperature and humidity sensor
defective
ITB Position Sensor error
SC499 C
Abnormal ITB Position Sensor
output.
• ITB Position Sensor 1 or 2 is dirty.
• ITB Position Sensor 1 or 2 is defective.
• ITB encoder strip is dirty,
• ITB encoder strip is damaged.
• ITB movement error (e.g. the belt cannot
rotate correctly due to friction).
• Connectors for ITB Position Sensor 1 or
2 are not connected correctly.
Rev. 07/2005
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