Description: Potential sensor error 4
When adjusting the drum potential (VD) at the process control initial setting, the drum potential sensor detects that VD is more than VG (grid voltage).
Causes: • Potential sensor defective • Poor connection between the potential sensor and the I/O board (IOB) • IOB defective • Poor connection between the drum unit and the I/O board (IOB) • Development power pack defective • Dirty or worn charge corona wire
Code: SC314
Description: Potential sensor error 5
When adjusting the drum potential (VH) for LD power adjustment during the process control initial setting, the first time the VH pattern is made, the drum potential sensor detects that VH is more than 500V.
Causes: • Potential sensor defective • Poor connection between the potential sensor and the I/O board (IOB) • IOB defective • Poor connection between the drum unit and the I/O board (IOB) • LD unit defective
Code: SC321
Description: No laser writing signal (F-GATE) error 1
The laser writing signal (F-GATE) does not go to LOW for more than 15 seconds after the copy paper reaches the registration sensor.
Causes: • BICU board defective • Poor connection of the printer controller • Printer controller defective
Code: SC322
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 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
Code: SC323
Description: LD drive current over
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
Code: SC326
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