Code :

Code: 504
Description: 4th paper tray lift motor malfunction (optional Paper Tray Unit)
The paper lift sensor did not activate within 18 sec. (for PTU) or 8 sec. (for LCT) 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: 506
Description: Paper tray feed motor lock (optional Paper Tray Unit)
A motor lock signal is not detected for more than 1.5 s at power-on or the lock signal is not detected for more than 1.0 s during rotation.
Causes: • An obstruction (jammed paper, paper scraps, etc.) has blocked the feed motor drive and caused an overload. • Paper tray feed motor connection loose, disconnected, or damaged • Paper tray feed motor defective
Remedy: 1. Check or replace the harness. 2. Replace the feed motor. 3. Replace the BCU

Code: 508
Description: By-pass bottom plate error
The signal from the by-pass tray HP sensor does not change for 1.0 second after the by-pass motor has rotated counterclockwise. If this condition occurs three consecutive times, the SC is generated.
Causes: • Disconnect or defective harness of the by-pass motor • Defective or disconnected connection for the by-pass motor. • Defective by-pass motor • Disconnect or defective harness of the by-pass HP sensor • Defective or disconnected connection for the by-pass HP sensor. • Defective by-pass HP sensor
Remedy: Check the operation of the by-pass motor with SP5804-023. No operation: 1. Check the harness connection of the by-pass tray and duplex unit. 2. Replace the by-pass motor. Operation: Check the operation of the by-pass HP sensor with SP5803-048 while the by-pass motor is rotating. No change of Bit 0 1. Check the harness connection of the by-pass HP sensor. 2. Replace the by-pass HP sensor.

Code: 530
Description: Ventilation fan: front error
The motor lock signal error is detected for 10 seconds after the motor lock signal was first detected.
Causes: • Defective ventilation fan: front or rear • Disconnected or defective harness • Defective DRB • Defective BCU
Remedy: 1. Check or replace the harness. 2. Replace the ventilation fan: front (SC530) or rear (SC531). 3. Replace the DRB. 4. Replace the BCU.

Code: 531
Description: Ventilation fan: rear error
The motor lock signal error is detected for 10 seconds after the motor lock signal was first detected.
Causes: • Defective ventilation fan: front or rear • Disconnected or defective harness • Defective DRB • Defective BCU
Remedy: 1. Check or replace the harness. 2. Replace the ventilation fan: front (SC530) or rear (SC531). 3. Replace the DRB. 4. 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 drive board • Defective BCU
Remedy: 1. Check or replace the harness. 2. Replace the laser unit fan. Replace the laser unit fan motor. 1. Replace the DRB. 2. 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 DRB • Defective BCU
Remedy: 1. Check or replace the harness. 2. Replace the fusing front fan. 3. Replace the DRB. 4. Replace the BCU.

Code: 534
Description: Fusing rear fan error
The motor lock signal error is detected for 10 seconds after the motor lock signal was first detected.
Causes: • Defective fusing rear fan • Disconnected or defective harness • Defective DRB • Defective BCU
Remedy: 1. Check or replace the harness. 2. Replace the fusing rear fan. 3. Replace the DRB. 4. Replace the BCU.