Description: Charge roller current leak A charge roller current leak signal was detected.
Causes: • Charge roller damaged • High voltage supply board defective • PCU harness defective or disconnected
Code: 304
Description: Charge roller current correction error The charge roller bias correction is performed twice even if the maximum charge roller bias (–2kV) is applied to the roller.
Causes: • ID sensor defective
Code: 320
Description: Polygon motor error The polygon motor does not reach the ready state (it does not reach 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: • Harness 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 LOW for more than 30 seconds after the 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 LD1 synchronization signal cannot be detected by the main scan synchronization detector board even after the laser diodes are activated.
Causes: • Poor harness 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 (Laser Diode) drive current too high The LD drive board applies more than 110 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