• Code: 236
• Description: FGATE ON error: C
  The PFGATE ON signal does not assert within 5 seconds after processing the image in normal job or MUSIC for start position [C].
• Causes: • Defective ASIC (Lupus) • Poor connection between controller and IPU. • Defective IPU
• Remedy: 1. Check the connection between the controller board and the IPU. 2. Replace the IPU. 3. Replace the controller board.

• 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 IPU. • Defective IPU
• Remedy: 1. Check the connection between the controller board and the IPU. 2. Replace the IPU. 3. Replace the controller board.

• Code: 240
• Description: LD error: Bk
  The IPU 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 IPU.

• Code: 241
• Description: LD error: Y
  The IPU 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 IPU.

• Code: 242
• Description: LD error: M
  The IPU 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 IPU.

• Code: 243
• Description: LD error: C
  The IPU 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 IPU.

• 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 PCUs. 2. Check if each toner bottle has enough toner. 3. Replace the ID sensor. 4. Replace the image transfer belt unit. 5. Replace the PCU(s). 6. Replace the laser optics housing unit.

• Code: 290
• Description: Shutter sensor time over error: Close
  The shutter close sensor does not detect "ON" for 2000 msec after the shutter motor turns on.
• Causes: • Defective shutter close sensor • Disconnected or broken harness • Defective shutter motor • Defective shutter • Shutter motor overload • Defective IOB
• Remedy: 1. Check or replace the harness. 2. Replace the shutter on the laser optics housing unit. 3. Replace the shutter motor. 4. Replace the shutter close sensor. 5. Replace the IOB.