Description: Charge roller current correction error
• The charge roller bias correction is performed twice even if the maximum charge roller bias (-2000V) is applied to the roller.
Causes: • ID sensor defective
Code: 320
Description: Polygon motor error
• The polygon motor does not reach its operating speed within 25 seconds after the polygon motor on signal, or the lock signal is still activated for more than 2 seconds after the polygon motor off signal.
Causes: • Cable at the polygon mirror motor disconnected or defective • Polygon motor or polygon motor driver defective • Polygon motor drive pulse not output correctly • LOCK signal could not be detected
Code: 321
Description: F-Gate error: No laser writing signal
• The laser writing signal (F-GATE) does not go to LOW for more than 30 seconds after the copy paper reaches the registration sensor.
Causes: • BICU board defective • PCI harness between the controller board and the BICU defective or disconnected
Code: 322
Description: 1st laser synchronization error
• The 1st laser synchronization signal cannot be detected by the main scan synchronization detector board even if the laser diodes are activated.
Causes: • Poor cable connection between the laser synchronization detector board and the LD unit. • Laser synchronization detector board out of position and angle of reflection not correct • Laser synchronization detector board defective • LD unit defective
Code: 323
Description: LD drive current too high
• The LD drive board applies more than 100 mA to the LD.
Causes: • LD unit defective (not enough power, due to aging) • Poor connection between the LD unit and the BICU board • BICU defective
Code: 326
Description: 2nd laser synchronization error
The 2nd laser synchronization signal cannot be detected by the main scan synchronization detector board even if the laser diodes are activated.
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