Description: Charge roller current leak
Charge leak detected when charge was applied to the charge roller. The upper limit of PWM duty was detected (65%) for 60 ms.
Description: Charge roller current correction error
The charge roller bias correction was done twice but maximum charge was not detected even after the maximum charge roller bias (–2kV) was applied to the roller.
Causes: • Charge roller defective due to excessive wear
Code: 321
Description: F-Gate error
No laser signal. The laser write signal (FGATE) did not go to LOW within 60 sec. after the copy paper reached the registration sensor.
Causes: • BICU board defective • PCI harness between the controller board and the BICU defective or disconnected
Code: 322
Description: Synchronization error
The synchronization signal was not issued within 500 ms after the LD fired while the polygon motor was turning at the prescribed number of revolutions.
Causes: • Laser synchronization board connectors or harness loose, disconnected, or damaged • Laser synchronization board defective or out of position • LD drive board defective
Code: 323
Description: LD drive current too high
The LD drive board output to the LD exceeded 100 mA .
Causes: • LD unit defective (not enough power, due to aging) • Poor connection between the LD unit and the BICU board • BICU defective
Code: 327
Description: LD unit home position error 1
The LD unit home position sensor did not detect the ON condition when the LD unit moved to its home position.
Causes: • LD unit HP sensor/harness defective • LD unit home position sensor defective • LD positioning motor connector or harness loose, broken, defective • LD unit or LD unit motor blocked • LD unit motor defective