Ricoh G035 Service Manual page 272

SERVICE CALL CONDITIONS
SC304: Charge Roller Current Correction Error
Definition [B]
The charge roller bias correction is performed twice even if the maximum
charge roller bias (–2,000 V) is applied to the roller.
Possible Causes
• ID sensor defective
SC320: Polygon Mirror Motor Error
Definition [B]
The polygon mirror motor does not reach its operating speed within 20 seconds
after the polygon mirror motor on signal, or the lock signal is still activated for
more than 20 seconds after the polygon mirror motor off signal.
Possible Causes
• Polygon mirror motor defective
• Poor connection between the polygon mirror motor driver and the BICU
board
• BICU board defective
SC321: No Laser Writing Signal (F-Gate) Error 1
Definition [B]
The laser writing signal (F-gate) does not go to LOW for more than 15 seconds
after the paper reaches the registration sensor.
Possible Causes
• BICU board defective
• Poor printer controller connection
• Printer controller defective
SC322: 1st Laser Synchronization Error
Definition [B]
The 1st laser synchronization signal cannot be detected by the main scan
synchronization detector board even if the laser diodes are activated.
Possible Causes
• 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
G035 7-2 SM