Description: Charge roller current leak
A current leak signal for the charge roller is detected.
Causes: • Charge roller damaged
• High voltage supply board defective
• Poor connection of the PCU
Code: 320
Description: Polygonal mirror motor error
The polygon mirror motor does not reach operating speed within 10 seconds after the motor ON signal is sent, or does not turn on within one of the 200 ms check intervals during operation.
Causes: • Polygon mirror motor defective
• Poor connection between the polygonal mirror motor driver and the BICU board
• Damaged cable between BICU and polygonal mirror motor driver
• BICU board defective
Code: 321
Description: No laser writing signal (F-GATE) error
The laser-writing signal (F-GATE) fails to turn Low after the laser crosses 5 mm on the drum surface from the laser writing start position.
Description: Laser synchronization error
The main scan synchronization detector board cannot detect the laser synchronization signal for more than 5 consecutive 100 ms intervals.
Causes: • Poor connection between the LD unit and the BICU board
• Damaged cable between BICU and LD unit
• LD unit out of position
• LD unit defective
• BICU board defective
Code: 390
Description: TD sensor error
The TD sensor outputs less than 0.2 V or more than 4.0 V 10 times consecutively during copying.
Causes: • TD sensor abnormal
• Poor connection of the PCU
Code: 391
Description: Development bias leak
A development bias leak signal is detected.
Causes: • Poor connection of the PCU
• High voltage supply board defective