Ricoh G176, Service Manual

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Service Call Conditions
SM 4-3 G176/G177/G176L
Tr
ouble
-
shooting
1st beam laser synchronization error
322 B
With all doors closed the polygon motor
is locked and not rotating, or the laser
synchronization detector could not
detect 1st beam laser detection signal
within 5 ms..
ƒ Laser synchronization
detector board out of position
ƒ
Laser synchronization
detector board or cable
defective
ƒ Laser synchronization mirror
out of position
ƒ
LD unit defective
ƒ Engine board defective
LD drive current exceeded
323 B
The LD driver detected an error for 500
ms.
ƒ LD unit defective
2nd beam laser synchronization error
326 B
With all doors closed the polygon motor
is locked and not rotating, or the laser
synchronization detector could not
detect 2nd beam laser detection signal
within 500 ms.
ƒ Laser synchronization
detector board out of position
ƒ LD unit defective
ƒ Engine board defective
Development bias leak
391 B
A development bias leak signal was
detected for 200 ms.
ƒ High voltage supply board
defective
ƒ Defective cartridge connection
Main motor error
500 B A main motor lock signal was not
detected within 700 ms after the main
motor started to rotate.
ƒ Main motor defective
ƒ Mechanical overload on the
drive mechanism