B064 SERIES SERVICE MODE 15 February 2006
4-20
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
• Poor connection between the transfer
current terminal and the transfer power
pack
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 disconnected,
defective
Quenching lamp error 430
D
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 disconnected
or defective
Main motor lock 440
D
The main motor lock signal remains
low for 2 seconds while the main
motor is on.
• Too much load on the drive mechanism
• Main motor defective
Development motor lock 441
D
The development motor lock signal
remains high for 2 seconds while
the development motor is on.
• Too much load on the drive mechanism
• Development motor defective
Main fan abnormal 490
D
The main fan motor lock signal
goes high for 5 s while the fan is
on.
• Too much load on the motor, motor is
blocked by something
• Fan connector disconnected
Toner recycling unit error 495
D
Encoder pulse does not change for
3 s after the main motor switches
on.
• Too much load on the drive mechanism
• 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 on the switch connector
Toner collection motor error 497
D
The toner collection motor
connector set signal remains off for
1 s.
• Toner collection motor defective
• Motor connector disconnected