• Code: 237
• Description: FGATE OFF error: C
  The PFGATE ON signal still asserts within 5 seconds after processing the image in normal job or MUSIC for end position [C]. The PFGATE ON signal still asserts when the next job starts.
• Causes: Defective ASIC (Lupus). Poor connection between controller and BICU. Defective BICU.
• Remedy: 1. Check the connection between the controller board and the BCU. 2. Replace the BCU. 3. Replace the controller board.

• Code: 240
• Description: LD error: Bk
  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 unit. 3. Replace the IPU board.

• Code: 241
• Description: LD error: Y
  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 unit. 3. Replace the IPU board.

• Code: 242
• Description: LD error: M
  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 unit. 3. Replace the IPU board.

• Code: 243
• Description: LD error: C
  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 unit. 3. Replace the IPU board.

• Code: 285
• Description: Line position adjustment (MUSIC) error
  Line position adjustment fails four consecutive times.
• Causes: • Pattern sampling error ( insufficient image density ) • Defective ID sensors for the line position adjustment • Defective image transfer belt unit • Defective PCU(s) • Defective laser optics housing unit
• Remedy: 1. Check and reinstall the image transfer belt unit and PCDU(s). 2. Check if each toner bottle has enough toner. 3. Replace the ID sensor. 4. Replace the image transfer belt unit. 5. Replace the PCDU(s). 6. Replace the laser unit.

• Code: 312
• Description: AC charge output error [K]
  The measured voltage is not proper when BICU measures the charge output for each color.
• Causes: Disconnected or broken high voltage cable. Defective or not installed PCU. Defective high voltage power supply.
• Remedy: 1. Check or replace the connectors. 2. Replace the PCDU for the affected color. 3. Replace the HVPS-CB board.

• Code: 313
• Description: AC charge output error [M]
  The measured voltage is not proper when BICU measures the charge output for each color.
• Causes: Disconnected or broken high voltage cable. Defective or not installed PCU. Defective high voltage power supply.
• Remedy: 1. Check or replace the connectors. 2. Replace the PCDU for the affected color. 3. Replace the HVPS-CB board.