• Code: 501
• Description: 1st paper tray lift motor malfunction
  The paper lift sensor did not activate within 18 sec. after the tray lift motor switched on.
• Causes: • An obstruction (jammed paper, paper scraps, etc.) has blocked the motor drive and caused an overload. • Paper lift sensor connection loose, disconnected, or damaged • Paper lift sensor defective • Tray lift motor connection loose, disconnected, or damaged • Tray lift motor defective
• Remedy: 1. Check or replace the harness. 2. Replace the tray lift motor. 3. Replace the BCU.

• Code: 502
• Description: 2nd paper tray lift motor malfunction (optional paper feed unit)
  The paper lift sensor did not activate within 18 sec. after the tray lift motor switched on.
• Causes: • An obstruction (jammed paper, paper scraps, etc.) has blocked the motor drive and caused an overload. • Paper lift sensor connection loose, disconnected, or damaged • Paper lift sensor defective • Tray lift motor connection loose, disconnected, or damaged • Tray lift motor defective
• Remedy: 1. Check or replace the harness. 2. Replace the tray lift motor. 3. Replace the BCU.

• Code: 503
• Description: 3rd paper tray lift motor malfunction (optional paper feed unit)
  The paper lift sensor did not activate within 18 sec. after the tray lift motor switched on.
• Causes: • An obstruction (jammed paper, paper scraps, etc.) has blocked the motor drive and caused an overload. • Paper lift sensor connection loose, disconnected, or damaged • Paper lift sensor defective • Tray lift motor connection loose, disconnected, or damaged • Tray lift motor defective
• Remedy: 1. Check or replace the harness. 2. Replace the tray lift motor. 3. Replace the BCU.

• Code: 504
• Description: 4th paper tray lift motor malfunction (optional paper feed unit)
  The paper lift sensor did not activate within 18 sec. after the tray lift motor switched on.
• Causes: • An obstruction (jammed paper, paper scraps, etc.) has blocked the motor drive and caused an overload. • Paper lift sensor connection loose, disconnected, or damaged • Paper lift sensor defective • Tray lift motor connection loose, disconnected, or damaged • Tray lift motor defective
• Remedy: 1. Check or replace the harness. 2. Replace the tray lift motor. 3. Replace the BCU.

• Code: 530
• Description: Development fan 1 error
  The motor lock signal error is detected for 10 seconds after the motor lock signal was first detected.
• Causes: • Defective development fan 1 or development fan 2 • Disconnected or defective harness • Defective BCU
• Remedy: 1. Check or replace the harness. 2. Replace the development fan 1 (SC530) or development fan 2 (SC531). 3. Replace the BCU.

• Code: 531
• Description: Development fan 2 error
  The motor lock signal error is detected for 10 seconds after the motor lock signal was first detected.
• Causes: • Defective development fan 1 or development fan 2 • Disconnected or defective harness • Defective BCU
• Remedy: 1. Check or replace the harness. 2. Replace the development fan 1 (SC530) or development fan 2 (SC531). 3. Replace the BCU.

• Code: 532
• Description: Laser unit fan error
  The motor lock signal error is detected for 10 seconds after the motor lock signal was first detected.
• Causes: • Defective laser unit fan • Disconnected or defective harness • Defective BCU
• Remedy: 1. Check or replace the harness. 2. Replace the laser unit fan. 3. Replace the BCU.

• Code: 533
• Description: Fusing front fan error
  The motor lock signal error is detected for 10 seconds after the motor lock signal was first detected.
• Causes: • Defective fusing front fan • Disconnected or defective harness • Defective BCU
• Remedy: 1. Check or replace the harness. 2. Replace the fusing front fan. 3. Replace the BCU.