Ricoh M001 Service Manual page 83

1st beam laser synchronization error
With all doors closed the polygon motor
is locked and not rotating, or the laser
322 B
synchronization detector could not
detect 1st beam laser detection signal
within 500 ms.
LD drive current exceeded
323 C
The LD driver detected an error for 50
ms.
2nd beam laser synchronization error
With all doors closed the polygon motor
is locked and not rotating, or the laser
326 B
synchronization detector could not
detect 2nd beam laser detection signal
within 500 ms.
Development bias leak
391 B
A development bias leak signal was
detected for 200 ms.
SM
Service Call Conditions
Laser synchronization
detector board out of position
Laser synchronization
detector board or cable
defective
Laser synchronization mirror
out of position
LD unit defective
Engine board defective
LD unit defective
Laser synchronization
detector board out of position
LD unit defective
Engine board defective
High voltage supply board
defective
Defective cartridge connection
4-3 M001