Ricoh B003 Service Manual page 189

Code No.
320 C Polygon motor error
The polygon motor does not reach its
operating speed within 25 seconds
after the polygon motor on signal, or
the lock signal is still activated for
more than 2 seconds after the
polygon motor off signal.
321 C F-Gate error: No laser writing signal
The laser writing signal (F-GATE) does
not go to LOW for more than 30
seconds after the copy paper
reaches the registration sensor.
322 C 1st laser synchronization error
The 1st laser synchronization signal
cannot be detected by the main scan
synchronization detector board even
if the laser diodes are activated.
323 C LD drive current over
The LD drive board applies more than
100 mA to the LD.
326 C 2nd laser synchronization error
The 2nd laser synchronization signal
cannot be detected by the main scan
synchronization detector board even if
the laser diodes are activated.
327 B LD unit home position error 1
The LD unit home position sensor does
not detect an on condition when the LD
unit moves to its home position.
328 B LD unit home position error 2
The LD unit home position sensor does
not detect an off condition when the LD
unit moves from its home position.
329 B LD unit beam pitch adjusted incorrectly
The LD unit HP sensor does not detect
the ON condition while changing the LD
unit position for correcting the LD
position or changing the dpi.
SM
CÓPIA NÃO CONTROLADA
Symptom
4-3
CÓPIA NÃO CONTROLADA
SERVICE CALL CONDITIONS
Possible Cause
I/F harness at the polygon drive motor
disconnected or defective
Polygon motor or polygon motor driver
defective
Polygon motor drive pulse not output
correctly
LOCK signal could not be detected
BICU board defective
PCI harness between the controller
board and the BICU defective or
disconnected
Poor I/F harness connection between
the laser synchronization detector
board and the LD unit.
Laser synchronization detector board
out of position and angle of reflection
not correct
Laser synchronization detector board
defective
LD unit defective
LD unit defective (not enough power,
due to aging)
Poor connection between the LD unit
and the BICU board
BICU defective
Poor connection between the laser
synchronization detector board and
the LD unit.
Laser synchronization detector board
out of position
Laser synchronization detector board
defective
LD unit defective
HP sensor/harness defective
LD unit home position sensor defective
LD positioning motor harness defective
LD unit movement blocked because of
incorrect connector routing
HP sensor/harness defective
LD positioning/harness motor defective
LD unit movement blocked because of
incorrect connector routing
After initialization of the SP modes,
SP2-109-3 or SP2-109-4 was not
executed.
The harness is blocking the LD drive
(PCB), preventing adjustment of the
pitch.
B003/B004/B006/B007