Ricoh G148, Service Manual

Page: 256 / 537

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.
• Transfer power pack defective
• Transfer unit harness disconnected
• Transfer connector loose, defective
430 C
Quenching lamp error
At the completion of auto process con-
trol 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, defec-
tive
440 D
Main motor lock
The main motor lock signal remains low
for 2 seconds while the main motor is
on.
• Drive mechanism overloaded
• Motor driver board defective
441 D
Development motor lock
The development motor lock signal re-
mains 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
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.
• Fan motor overloaded due to obstruction
• Fan connector disconnected
495 D
Toner recycling unit error
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
Service Mode
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