Ricoh A-C2 - Page 159

19 January, 2001 SERVICE CALL CONDITIONS
4-3
Trouble-
shooting
Code No. Symptom Possible Cause
Polygon motor error320 C
• 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.
• Cable at the polygon mirror motor
disconnected or defective
• Polygon motor or polygon motor
driver defective
• Polygon motor drive pulse not output
correctly
• LOCK signal could not be detected
F-Gate error: No laser writing signal321 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 error322 C
• The 1st laser synchronization signal
cannot be detected by the main scan
synchronization detector board even
if the laser diodes are activated.
• Poor cable 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 too high323 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 error326 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 1327 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 2328 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 incorrectly329 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.