• Code: SC323
• Description: LD Drive Current Over Definition [B] 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 Definition [B] 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

• Code: SC327
• Description: LD Unit Home Position Error 1 Definition [B] The LD unit home position sensor does not detect an on condition when the LD unit moves to its home position.
• Causes: · LD unit home position sensor defective · LD positioning motor defective · LD unit movement blocked because of incorrect connector routing

• Code: SC328
• Description: LD Unit Home Position Error 2 Definition [B] The LD unit home position sensor does not detect an off condition when the LD unit moves from its home position.
• Causes: · LD unit home position sensor defective · LD positioning motor defective · LD unit movement blocked because of incorrect connector routing

• Code: SC329
• Description: Laser Beam Pitch Adjustment Error Definition [B] The LD unit home position sensor does not detect an on condition while changing the LD unit position for correcting the LD position or changing the dpi.
• Causes: · The laser beam pitch adjustment (SP2-6-3 and 4) was not done after replacing the NVRAM or doing an NVRAM clear. · The laser beam pitch adjustment (SP2-6-1 ~ 4) was not done after replacing the LD unit. · LD unit movement blocked because of incorrect connector routing

• Code: SC350-1
• Description: ID Sensor Error 1 Definition [D] One of the following ID sensor output voltages was detected twice consecutively when checking the ID sensor pattern. 1) Vsp>=2.5 V 2) Vsg<=2.5 V 3) Vsp = 0 V 4) Vsg = 0 V
• Causes: · ID sensor defective · ID sensor connector defective · Poor ID sensor connector connection · I/O board (IOB) defective · High voltage supply board defective · Dirty ID sensor · Defect at ID sensor pattern writing area of the drum

• Code: SC350-2
• Description: ID Sensor Error 2 Definition [D] The ID sensor output voltage is 5.0 V and the PWM signal input to the ID sensor is 0 when checking the ID sensor pattern.
• Causes: · ID sensor defective · ID sensor connector defective · Poor ID sensor connector connection · I/O board (IOB) defective · High voltage supply board defective · Dirty ID sensor · Defect at the ID sensor pattern writing area of the drum

• Code: SC350-3
• Description: ID Sensor Error 3 Definition [D] The ID sensor pattern edge voltage is detected to be not 2.5 V twice consecutively during an 800 ms interval.
• Causes: · ID sensor defective · ID sensor connector defective · Poor ID sensor connector connection · I/O board (IOB) defective · High voltage supply board defective · Dirty ID sensor · Defect at the ID sensor pattern writing area of the drum