Description: Automatic SBU adjustment error
During the automatic SBU adjustment, the machine detects that the white level read from the white plate or paper is out of range.
Causes: • Exposure lamp defective • SBU auto adjustment was not done correctly • SBU defective • BiCU board defective • Exposure lamp stabilizer defective
Code: 194
Description: SBU White Level Detection Error
The automatic SBU adjustment failed twenty times consecutively.
Causes: • Exposure lamp defective • Dirty white plate • Incorrect position or width of white plate scanning • BiCU board defective • SBU board defective
Code: 302
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/IOB 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.
Causes: • BiCU board defective • IMB board defective • The fax controller or printer controller has a poor connection • Fax controller or printer controller defective
Code: 322
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