Ricoh Aficio MP 1600L2, Field Service Manual

Page: 182 / 264

No.
Definition
Symptom Possible Cause
302 B
Charge roller current leak
A current leak signal for the charge
roller is detected.
• Charge roller damaged
• High voltage supply board defective
• Poor connection of the PCU
320 B
Polygonal mirror motor error
The polygon mirror motor does not
reach operating speed within 10
seconds after the motor ON signal
is sent, or does not turn on within
one of the 200 ms check intervals
during operation.
• Polygon mirror motor defective
• Poor connection between the polygonal
mirror motor driver and the BICU board
• Damaged cable between BICU and
polygonal mirror motor driver
• BICU board defective
321 C
No laser writing signal (F-GATE) error
The laser-writing signal (F-GATE)
fails to turn Low after the laser
crosses 5 mm on the drum surface
from the laser writing start position.
• BICU board defective
• The fax controller or printer controller has a
poor connection
• Fax controller or printer controller defective
322 B
Laser synchronization error
The main scan synchronization
detector board cannot detect the
laser synchronization signal for
more than 5 consecutive 100 ms
intervals.
• Poor connection between the LD unit and the
BICU board
• Damaged cable between BICU and LD unit
• LD unit out of position
• LD unit defective
• BICU board defective
390 B
TD sensor error
The TD sensor outputs less than 0.2
V or more than 4.0 V 10 times
consecutively during copying.
• TD sensor abnormal
• Poor connection of the PCU
6. Troubleshooting
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