Ricoh B064 - Page 367

B140 SERIES AND G126 SERVICE MODE
SM 4-43 B064 Series/B140 Series/G126
Trouble-
shooting
SC No. Symptom Possible Cause
Potential sensor calibration error 7 317 C
During drum potential sensor
calibration, when VL is adjusted, the
pattern surface potential VL pattern
is not within range 0V ~ –400V. (VL
is the potential after exposing a
white pattern.)
• Potential sensor defective
• Potential sensor harness disconnected
• Potential sensor connector defective or
disconnected
• IOB defective
• OPC connector defective
• Charge corona power pack defective
• Development power pack defective
No laser writing signal (F-GATE error) 321 D
The laser writing signal (F-GATE)
for the IPU does not go LOW within
60 s.
• BICU board defective
• PCI bus between controller board, BICU
board defective
Laser synchronization detector error 322 D
After the polygon motor reaches
standard rotation speed and the LD
unit fires for 500 ms, the laser
synchronization detector does not
generate a signal.
• Harness between detector and I/F
disconnected or damaged
• Detector is installed incorrectly
• Detector board is defective
• IPU board defective
Polygon mirror motor error 1 335 D
The ready signal does not go low
within 20 s after the polygon mirror
motor turns on or changes speed.
• Harness between I/F and polygon motor
disconnected or defective
• Polygon motor or polygon motor driver
defective
• IPU board defective
Polygon mirror motor error 2 336 D
The ready signal does not go high
within 20 s after the polygonal
mirror motor turns off.
• Harness between I/F and polygon motor
disconnected or defective
• Polygon motor or polygon motor driver
defective
• IPU board defective
Polygonal mirror motor error 3 337 D
The XSCRDY signal goes high
while the polygon mirror motor turns
on, even though there was no
request to either turn off the motor
or change the motor speed.
• Noise on the line where the polygon
ready signal (XSCRDY) is transmitted.
• Harness between the polygon motor and
I/F disconnected or defective.
• Polygon motor or polygon motor driver
defective
Polygonal mirror motor error 4 338 D
While the polygon motor is rotating,
the XSCRDY signal goes high
during exposure.
• Noise on the line where the polygon
ready signal (XSCRDY) is transmitted.
• Harness between the polygon motor and
I/F disconnected or defective.
• Polygon motor or polygon motor driver
defective
• IPU board defective