• Code: 221
• Description: Laser Synchronization Detector Error: K Leading Edge (Not LD0)
  While the polygon motor is rotating normally, no synchronizing detection signal is output for black, leading edge for any LD other than LD0.
• Causes: • Harness between the laser synchronizing detector and I/F unit is disconnected, defective • Check all connections between LD unit, LDB, IPU • LD unit • LDB defective • IPU defective
• Remedy:

• Code: 230
• Description: FGATE ON error: K
  The PFGATE ON signal does not assert within 5 seconds after processing the image in normal job or MUSIC for start position [K].
• Causes: • Defective ASIC • Poor connection between controller and BICU. • Defective BICU
• Remedy: 1. Check the connection between the controller board and the BICU. 2. Replace the BICU. 3. Replace the controller board.

• Code: 231
• Description: FGATE OFF error: K
  • The PFGATE ON signal still asserts within 5 seconds after processing the image in normal job or MUSIC for end position [K]. • The PFGATE ON signal still asserts when the next job starts.
• Causes:
• Remedy: 1. Check the connection between the controller board and the BICU. 2. Replace the BICU. 3. Replace the controller board.

• Code: 240
• Description: LD error: K
  The BICU detects LDB error a few times consecutively when LDB unit turns on after LDB initialization.
• Causes: • Worn-out LD • Disconnected or broken harness of the LD
• Remedy: 1. Replace the harness of the LD. 2. Replace the laser optics housing unit. 3. Replace the BICU.

• Code: 300
• Description: Charge corona output error
  The feedback voltage from the charge corona unit is detected too high 9 times.
• Causes: • Charge corona power pack defective • Charge corona harness disconnected • Poor charge corona unit connection
• Remedy:

• Code: 303
• Description: Charge corona grid leak
  When the high voltage is output to the corona grid, feedback voltage exceeds the prescribed value 9 times.
• Causes: • Charge corona power pack defective • Charge corona harness disconnected • Poor charge corona unit connection
• Remedy:

• Code: 304
• Description: Charge grid circuit open
  When high voltage goes to the corona grid, feedback voltage is more than the set value 9 times. This feedback voltage is used to update PWM for output control.
• Causes: • Charge corona unit defective or disconnected • Charge corona harness defective • Charge corona power pack is defective.
• Remedy:

• Code: 305
• Description: Charge corona wire cleaner error 1
  The charge cleaner pad does not arrive at the home position: Motor locked within 4 s after switching on, or does not lock within 30 s. Motor locked within 10 s after reversing, or does not lock within 30 s.
• Causes: • Charge corona wire cleaner motor defective • Motor driver defective
• Remedy: