SERVICE CALL CONDITIONS
B234/B235/B236/D101/D102/D103 4-22 SM
Drum Motor Error
SC396 B
The drum motor lock signal is
longer than 2 s while the drum
motor is on.
• Drum motor connector, harness loose,
broken, defective
• Drum motor defective
• Mechanical problem with the drum unit,
transfer belt, toner collection unit
ID Sensor Error 1: Background Adjustment Error
SC400 C
One of the following ID sensor
output voltages was detected for
Vsg (the reading of the bare
drum surface) at ID sensor
initialization.
• The reading was less than 4V
at PWM=255 (Maximum
PWM).
• The reading was over 4V at
PWM=0 (Minimum PWM)
• ID sensor harness, connector was loose,
broken, defective
• ID sensor dirty
• ID sensor defective
• IOB defective
• BCU defective
• LD unit defective
• CGB/PPG power pack defective
NOTE
• The most recent correct PWM value is used for control.
• The value displayed by SP3103 (ID Sensor Output Display) is the actual,
incorrect value.
ID Sensor Error 2: Background Output Error
SC401 C
One of the following conditions were
detected when checking the ID sensor
pattern:
• Vsg ≤ 2.5 V
• Vsg= 0 V
• The ID sensor output voltage = 5.0 V
and PWM signal input to ID sensor =
0
Note: Vsg is the ID sensor output after
checking the bare drum surface in the
ID sensor pattern.
• ID sensor harness, connector is
loose, broken, or defective
• ID sensor dirty
• ID sensor defective
• IOB defective
• LD Unit defective
• BCU defective
• CGB/PPG power pack defective
NOTE
• The SC code is not displayed; only the logging data is incremented.
• When this SC is issued, only the toner density sensor output (Vt) (even for jobs
less than 10 copies) and Vref is not updated.
• After an abnormal condition is detected, SP3103 (ID Sensor Output Display)
shows "Vsp = Vsg = 0" (or "5.0V").
• If the next ID sensor pattern check is normal, this restores normal operation.
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