B140 SERIES AND G126 SERVICE MODE
B064 Series/B140 Series/G126 4-46 SM
SC400: Image Development System (2)
SC No. Symptom Possible Cause
Transfer output abnormal 401 D
When the transfer is output, the
feedback voltage remains higher
than 4V for 60 ms.
• Transfer power pack defective
• Transfer current terminal, transfer power
pack disconnected, damaged connector
Transfer output abnormal release detection 402 D
When the transfer is output, there is
hardly any feedback voltage within
60 ms even with application of 24%
PWM.
• Transfer power pack defective
• Transfer unit harness disconnected
• Transfer connector loose, defective
Quenching lamp error 430 C
At the completion of auto process
control initialization, the potential of
the drum surface detected by the
potential sensor is more than
–400V, the prescribed value.
• Quenching lamp defective
• Quenching lamp harness disconnected
• Quenching lamp connector loose,
defective
Main motor lock 440 D
The main motor lock signal remains
low for 2 seconds while the main
motor is on.
• Drive mechanism overloaded
• Motor driver board defective
Development motor lock
The development motor lock signal
remains high for 2 seconds while
the development motor is on.
• Drive mechanism overloaded due to
toner clumping in the wasted toner path
• Motor driver board defective
441 D
If this SC is returned on a machine in the field, inspect the toner supply unit coil. If
the gear is not damaged replace the coil. If the gear is damaged, the gear shaft is
probably deformed, so replace the entire unit.
Main fan error 490 D
The main fan motor lock signal
goes high for 5 s while the fan is
on.
• Fan motor overloaded due to obstruction
• Fan connector disconnected
Toner recycling unit error 495 D
Encoder pulse does not change for
3 s after the main motor switches
on.
• Waste toner transport has stopped due
to motor overload
• Toner end sensor detective,
disconnected
Toner collection bottle error 496 D
The toner collection bottle set
switch remains off when the front
door is closed.
• No toner collection bottle set
• Poor connection of the switch connector
Toner collection motor error 497 D
The toner collection motor
connector set signal remains off for
1 s.
• Toner pump motor defective
• Motor connector loose, disconnected
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