Description: Laser synchronization error
The main scan synchronization detector does not detect the laser signal for 0.5 second.
Causes: • Toner bottle not installed
• Loose connection between the LD unit and the BICU
• Defective cable between the BICU and LD unit
• LD unit out of position
• Defective LD unit
• Defective BICU
Code: 390
Description: TD sensor error
The BICU detects the TD sensor outputting extraordinary voltage (less than 0.2 V or more than 4.0 V) 10 times consecutively.
Causes: • Defective TD sensor
• Loose connection of the PCU
Code: 391
Description: Development bias leak
The polling module detects a current leak of the development bias.
Causes: • Loose connection of the PCU
• Defective high voltage supply board
Code: 392
Description: Developer initialization error
The ID sensor does not detect a correct pattern during developer initialization (* 2-214-001).
Causes: • Defective ID sensor
• Insufficient developer
• Defective drum operation
• Defective development roller operation
• Loose connection of the PCU
• Insufficient voltage for the charge roller
Code: 401
Description: Transfer roller leak error (positive electrode)
The feedback voltage of the transfer roller is insufficient.
Causes: • Defective high voltage supply board
• Loose connection of the PCU
• Incorrect installation of the transfer unit or the separation unit
• Defective transfer roller
Code: 402
Description: Transfer roller leak error (negative electrode)
The feedback voltage of the transfer roller is insufficient.
Causes: • Defective high voltage supply board
• Loose connection of the PCU
• Incorrect installation of the transfer unit or the separation unit
• Defective transfer roller