• Code: SC320
• Description: Polygon motor error
  The polygon motor does not reach its operating speed within 20 seconds after sending the polygon motor ON signal, or the motor speed does not decrease within 20 seconds after sending the polygon motor OFF signal.
• Causes: • 24V line abnormal (blown fuse condition) • Polygon motor defective • Polygon motor driver defective • Poor connection of the interface harness which connects the polygon motor driver and the EX-IPU board • EX-IPU board defective • FU103 on the DC power supply board is blown

• Code: SC321
• Description: No laser start signal (F-GATE error)
  The laser start signal (F-GATE) is not sent within 20 seconds after the copy paper reaches the registration sensor.
• Causes: • BCU board defective • EX-IPU board defective • Poor connection of the interface harness which connects the BCU board and the EX-IPU board

• Code: SC322
• Description: Laser synchronization error 1
  The laser synchronization signal can not be detected by the main scan synchroniziation detector board -1 just after the LD is turned on while the polygon mirror is rotating at operating speed.
• Causes: • Poor connection of the interface harness which connects the laser synchronization detector board -1 and the EX-IPU board • Laser synchronization detector board -1 out of position • Laser synchronization detector board -1 defective • EX-IPU board defective • LD unit defective

• Code: SC323
• Description: LD drive current over
  The LD drive board applies more than 100 mA to the LD.
• Causes: • LD unit defective (not enough power, due to aging) • Poor connection of the interface harness which connects the LD unit and the EX-IPU board • Temperature around the LD unit is too high

• Code: SC325
• Description: Laser synchronizing signal error 2
  The interval of the laser synchronizing signal detected by the main scan synchronization detector board -2 becomes outside the correctable range.
• Causes: • Main scan synchronization detector board -2 defective • Poor connection of the interface harness which connects the main scan synchronization detector board -2 and the EX-IPU board • Main scan synchronization detector board -2 out of position • EX-IPU board defective • Polygon motor defective

• Code: SC350
• Description: ID sensor error
  Vsg falls out of the adjustment target (4 ± 0.2 V) during Vsg checking
  Vsp>2.5V or Vsg<2.5V is detected twice consecutively during copying.
• Causes: • ID sensor board defective • Dirty ID sensor board • BCU board defective • High voltage control board defective

• Code: SC360
• Description: Hard disk drive error 1
  The EX-IPU board does not receive the response signal from the HDD.
• Causes: • Poor connection of the interface harness which connects the EX-IPU board and the HDD. • HDD power cord not connected properly. • HDD defective • SCSI controller on the EX-IPU defective.

• Code: SC361
• Description: Hard disk drive error 2
  The image data stored in the HDD cannot be output properly.
• Causes: • EX-IPU board defective