• Code: 503
• Description: 3rd paper tray lift motor malfunction (optional paper feed unit)
  The paper lift sensor does not detect paper or finish the detection within the specified time, 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 connector and harness. 2. Replace the tray lift motor.

• Code: 508
• Description: By-pass bottom plate error
  The signal from the by-pass tray HP sensor does not change for 2 seconds after the by-pass bottom plate clutch was activated. If this condition occurs three consecutive times, this SC is generated.
• Causes: Disconnected or defective connectors of the by-pass bottom plate clutch. Disconnected or defective by-pass HP sensor. Defective by-pass bottom plate detection filler
• Remedy: 1. Check or replace the connectors of the by-pass bottom plate clutch. 2. Check or replace the by-pass HP sensor.

• Code: 524
• Description: Transport motor error
  The machine detects a High signal from a transport motor lock detection for 2 seconds after the transport motor turned on.
• Causes: Unit overload. Defective motor.
• Remedy: 1. Replace the unit. 2. Replace the motor.

• Code: 525
• Description: Transport motor error: bank 1
  The machine detects a Lock signal from a bank 1 transport motor after the motor turned on.
• Causes: Motor overload. Defective motor. Disconnected connectors. Broken harness.
• Remedy: 1. Turn off and on the main power switch. 2. Check or connect the connectors. 3. Replace the harness. 4. Replace the motor.

• Code: 526
• Description: Transport motor error: bank 2
  The machine detects a Lock signal from a bank 2 transport motor after the motor turned on.
• Causes: Motor overload. Defective motor. Disconnected connectors. Broken harness.
• Remedy: 1. Turn off and on the main power switch. 2. Check or connect the connectors. 3. Replace the harness. 4. Replace the motor.

• Code: 530
• Description: Fusing heater exhaust fan motor error
  The motor lock signal error is detected 50 consecutive times (5 seconds) after the motor lock signal was first detected.
• Causes: Defective fan motor. Disconnected or defective harness. Defective BICU
• Remedy: 1. Check or replace the harness. 2. Replace the fan motor. 3. Replace the BICU.

• Code: 531
• Description: Development cooling fan motor error
  The motor lock signal error is detected 50 consecutive times (5 seconds) after the motor lock signal was first detected.
• Causes: Defective fan motor. Disconnected or defective harness. Defective BICU
• Remedy: 1. Check or replace the harness. 2. Replace the fan motor. 3. Replace the BICU.

• Code: 532
• Description: Writing cooling fan motor error
  The motor lock signal error is detected 50 consecutive times (5 seconds) after the motor lock signal was first detected.
• Causes: Defective fan motor. Disconnected or defective harness. Defective BICU
• Remedy: 1. Check or replace the harness. 2. Replace the fan motor. 3. Replace the BICU.