Ricoh G035 Service Manual page 274

SERVICE CALL CONDITIONS
SC329: Laser Beam Pitch Adjustment Error
Definition [B]
The LD unit home position sensor does not detect an on condition while
changing the LD unit position for correcting the LD position or changing the dpi.
Possible Causes
• The laser beam pitch adjustment (SP2-6-3 and 4) was not done after
replacing the NVRAM or doing an NVRAM clear.
• The laser beam pitch adjustment (SP2-6-1 ~ 4) was not done after replacing
the LD unit.
• LD unit movement blocked because of incorrect connector routing
SC350-1: ID Sensor Error 1
Definition [D]
One of the following ID sensor output voltages was detected twice
consecutively when checking the ID sensor pattern.
1) Vsp ≥ 2.5 V
2) Vsg ≤ 2.5 V
3) Vsp = 0 V
4) Vsg = 0 V
Possible Causes
• ID sensor defective
• ID sensor connector defective
• Poor ID sensor connector connection
• I/O board (IOB) defective
• High voltage supply board defective
• Dirty ID sensor
• Defect at ID sensor pattern writing area of the drum
SC350-2: ID Sensor Error 2
Definition [D]
The ID sensor output voltage is 5.0 V and the PWM signal input to the ID
sensor is 0 when checking the ID sensor pattern.
Possible Causes
• ID sensor defective
• ID sensor connector defective
• Poor ID sensor connector connection
• I/O board (IOB) defective
• High voltage supply board defective
• Dirty ID sensor
• Defect at the ID sensor pattern writing area of the drum
G035 7-4 SM