Sc400: Image Development System (2) - Ricoh B064 Service Manual

B140 SERIES AND G126 SERVICE MODE

SC400: Image Development System (2)

SC No.
401 D Transfer output abnormal
When the transfer is output, the
feedback voltage remains higher
than 4V for 60 ms.
402 D Transfer output abnormal release detection
When the transfer is output, there is
hardly any feedback voltage within
60 ms even with application of 24%
PWM.
430 C Quenching lamp error
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.
440 D Main motor lock
The main motor lock signal remains
low for 2 seconds while the main
motor is on.
441 D Development motor lock
The development motor lock signal
remains high for 2 seconds while
the development motor is on.
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.
490 D Main fan error
The main fan motor lock signal
goes high for 5 s while the fan is
on.
495 D Toner recycling unit error
Encoder pulse does not change for
3 s after the main motor switches
on.
496 D Toner collection bottle error
The toner collection bottle set
switch remains off when the front
door is closed.
497 D Toner collection motor error
The toner collection motor
connector set signal remains off for
1 s.
B064 Series/B140 Series/G126
Symptom
4-46
Possible Cause
• Transfer power pack defective
• Transfer current terminal, transfer power
pack disconnected, damaged connector
• Transfer power pack defective
• Transfer unit harness disconnected
• Transfer connector loose, defective
• Quenching lamp defective
• Quenching lamp harness disconnected
• Quenching lamp connector loose,
defective
• Drive mechanism overloaded
• Motor driver board defective
• Drive mechanism overloaded due to
toner clumping in the wasted toner path
• Motor driver board defective
• Fan motor overloaded due to obstruction
• Fan connector disconnected
• Waste toner transport has stopped due
to motor overload
• Toner end sensor detective,
disconnected
• No toner collection bottle set
• Poor connection of the switch connector
• Toner pump motor defective
• Motor connector loose, disconnected
SM