Ricoh B079 - Page 201

Trouble-
shooting
SERVICE CALL CONDITIONS
SM 4-3 B079/B082
Code No. Symptom Possible Cause
F-Gate error: No laser writing signal 321 C
The laser writing signal (F-GATE) does
not go to LOW for more than 30
seconds after the copy paper
reaches the registration sensor.
BICU board defective
PCI harness between the controller
board and the BICU defective or
disconnected
1st laser synchronization error 322 C
The 1st laser synchronization signal
cannot be detected by the main scan
synchronization detector board even
if the laser diodes are activated.
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 drive current over 323 C
The LD drive board applies more than
100 mA to the LD.
LD unit defective (not enough power,
due to aging)
Poor connection between the LD unit
and the BICU board
BICU defective
2nd laser synchronization error 326 C
The 2nd laser synchronization signal
cannot be detected by the main scan
synchronization detector board even if
the laser diodes are activated.
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
LD unit home position error 1 327 B
The LD unit home position sensor does
not detect an on condition when the LD
unit moves to its home position.
HP sensor/harness defective
LD unit home position sensor defective
LD positioning motor harness defective
LD unit movement blocked because of
incorrect connector routing
LD unit home position error 2 328 B
The LD unit home position sensor does
not detect an off condition when the LD
unit moves from its home position.
HP sensor/harness defective
LD positioning/harness motor defective
LD unit movement blocked because of
incorrect connector routing
LD unit beam pitch adjusted incorrectly 329 B
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.
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.
Polygonal Mirror Motor Error 1: ON
Timeout
335 C
The XSCRDY signal is not issued
(LOW: Active) within 25 s after the
polygonal mirror motor switches on.
I/F harness of the polygonal mirror
motor disconnected or defective.
Polygonal mirror motor or polygonal
mirror motor driver defective.
Polygonal mirror motor drive pulse is
not output incorrectly.
GABIC cannot monitor XSCRDY signal.
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA