Code :

Code: 491
Description: High voltage power: Drum/ development bias output error An error signal is detected for 0.2 seconds when charging the drum unit.
Causes: • High voltage leak • Broken harness • Defective drum unit • Defective HVPS-CB board
Remedy: 1. Check or replace the harness. 2. Replace the PCDU. 3. Replace the HVPS-CB board.

Code: 492
Description: High voltage power: Image transfer/ paper transfer bias output error An error signal is detected for 0.2 seconds when charging the separation, image transfer belt or paper transfer roller.
Causes: • High voltage leak • Broken harness • Defective image transfer belt unit or paper transfer unit • Defective HVPS: T1T2 board
Remedy: 1. Input "0V" in the following SP settings: • SP2-326-001 • SP2-326-003 • SP2-407-001 2. Execute the "Process Control" with SP3011-001. 3. Replace the ITB unit if an SC occurs after the Process Control. 4. Replace the PTR unit if an SC does not occur after the Process Control. 5. Replace the HVPS: T1T2 board.

Code: 495
Description: Toner collection motor error The machine detects that the waste toner bottle is not set for one second when the toner collection motor is turned off.
Causes: • Toner collection motor damaged • Disconnect or defective harness • Defective BCU
Remedy: 1. Check or replace the harness. 2. Replace the toner collection motor. 3. Replace the BCU 4. Check and retry the connecting procedure.

Code: 498
Description: Temperature and humidity sensor error • The thermistor output of the temperature sensor was not within the prescribed range (0.2V to 3.5V). • The thermistor output of the humidity sensor was not within the prescribed range (0.01V to 2.4V).
Causes: • Temperature and humidity sensor harness disconnected, loose, defective • Temperature and humidity sensor defective
Remedy: 1. Check the connector and harness. 2. Replace the temperature/humidity sensor.

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: 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.