• Code: 381
• Description: Paper running jam (error code 381)
• Remedy: Jam occurs immediately after the power is turned on.
  (6-1-1) Check condition of the running path. Paper running path of the front unit Check if paper is jammed or not in the paper running path. Remove the jammed paper. (6-1-2) Check condition of the mechanical parts Check the sensor lever of the WR sensor. Check if shape and movement of the sensor levers have any abnormality or not. Replace the sensor lever with the good sensor lever. (6-1-3) Check condition of electrical parts Check the detection condition of the sensor signal. Confirm that the sensor signals are normally detected by using the SWITCH SCAN function of the maintenance menu. Replace the CU/PU board, or appropriate sensor(s) or connection cord(s). Check the sensor lever of the WR sensor. Check the following signal by using the CU/ PU board RGSNS connector 1: RGSNS 2pin: WR sensor Confirm that the above signal levels change when the sensor lever is operated. Replace the sensor.
  Jam occurs immediately after a paper is taken into printer.
  (6-2-1) Check condition of the paper running path Paper running path on the belt. Remove the ID unit and check if paper is jammed or not in the paper running path. Remove the jammed paper. (6-2-2) Check condition of the mechanical parts Check the sensor lever of the WR sensor. Check if shape and movement of the sensor levers have any abnormality or not. Replace the sensor lever with the good sensor lever. (6-2-3) Motor operation check Paper feed motor driver, belt motor driver and ID motor Confirm that the paper feed motor, belt motor and ID motor work normally by using the Motor & Clutch Test of the selfdiagnostic mode. Check if any load exists or not. Replace the CU/ PU board or the feed motor or the belt motor or the ID motor or the ID unit or the belt unit. Paper feed motor driver, belt motor driver Pull out the CU/PU board HOP connector, and check the following at the side of the connector: Between 1pin – FG: Several M Between 2pin – FG: Several M Between 3pin – FG: Several M Between 4pin – FG: Several M Pull out the CU/PU board BELT connector, and check the following at the side of the connector: Between 1pin – FG: Several M Between 2pin – FG: Several M Between 3pin – FG: Several M Between 4pin – FG: Several M Replace the CU/PU board.

• Code: 390
• Description: (5) Paper feed jam (error code 390: Multipurpose tray)
• Remedy: (5-1) Jam occurs immediately after the power is turned on. (Multipurpose tray)
  (5-1-1) Check condition of the paper running path Paper running path of the front unit Check if paper is jammed or not in the paper running path. Remove the jammed paper. (5-1-2) Check condition of the mechanical parts IN sensor and WR sensor lever check Check the sensor lever shapes and operations for any problem Replace the sensor lever(s) with proper one(s) (5-1-3) Check condition of electrical parts Check the detection condition of the sensor signal. Confirm that the sensor signals are normally detected by using the SWITCH SCAN function of the Maintenance menu. Replace the CU/PU board, or appropriate sensor(s) or connection cord(s). In sensor and WR sensor output level check Check the following signals by using the CU/PU board RGSNS connector : RGSNS 5pin: IN sensor RGSNS 2pin: WR sensor Confirm that the above signal levels change when the sensor lever is operated. Replace the sensor.
  (5-2) Jam occurs immediately after paper feed is started. (Multipurpose tray)
  (5-2-1) Check condition of the paper running path Paper running path of the multipurpose tray Check if paper is jammed or not in the paper running path. Remove the jammed paper. Sheet Receive of the multipurpose tray Confirm that the Sheet Receive has moved up normally. Confirm that the support spindle and spring of the Sheet Receive have been installed in the specified positions normally. Correct installation of the above parts so that the Sheet Receive moves up to the specified position normally. (5-2-2) Check condition of the mechanical parts IN sensor and WR sensor lever check Check the sensor lever shapes and operations for any problem Replace the sensor lever(s) with proper one(s). Front cover Confirm that the locks in the right and left of the front cover are locked normally. Replace the font cover assembly Check the feed roller and the pickup roller. Check if any foreign materials such as paper dust on the surface of the feed roller or of the pickup roller or not. Remove the foreign material. Check if the feed roller has worn out or not. Replace the feed roller. (5-2-3) Motor operation check Paper feed motor Confirm that the paper feed motor works normally by using the Motor & Clutch Test of the self-diagnostic mode. Replace the CU/ PU board or the feed motor. Paper feed motor driver Pull out the CU/PU board HOP connector, and check the following at the side of the connector: Between 1pin – FG: Several M Between 2pin – FG: Several M Between 3pin – FG: Several M Between 4pin – FG: Several M Replace the CU/PU board. (5-2-4) Clutch operation check MPT clutch and regist clutch Confirm that the paper feed motor works normally by using the Motor & Clutch Test of the self-diagnostic mode. Pull out the cassette for the rollers to be seen, and check operation. Replace the CU/PU board or MPT clutch or regist clutch. (5-2-5) Check the system connection Paper feed motor drive cable Check the connection condition of the cable. Check if the connector is connected in the half-way only or not, and check if the connector is inserted in a slanted angle or not. Check also that cables are assembled without any abnormality. Replace the cable with the good cable that normalizes the connection condition. Pull out the CU/PU board HOP connector, and check the following at the side of the connector: Between 1pin – FG: Do not short-circuit Between 2pin – FG: Do not short-circuit Between 3pin – FG: Do not short-circuit Between 4pin – FG: Do not short-circuit Replace the cable with the good cable that normalizes the connection condition. MPT clutch cable Check the connection condition of the cable. Check if the connector is connected in the half-way only or not, and check if the connector is inserted in a slanted angle or not. Check also that cables are assembled without any abnormality. Normalizes the connection condition. Replace the clutch. MPT clutch Pull out the CU/PU board MPC connector, and check the following at the side of the connector. Between 1pin – FG: Do not short-circuit Between 1pin – 2pin: About 240 Replace the clutch and properly assemble appropriate parts. Paper feed motor Pull out the CU/PU board HOP connector, and check the following at the side of the connector. Between 1pin – 2pin: 3.4 or 5 Between 3pin – 4pin: 3.4 or 5 Replace the Paper feed motor.

• Code: 391
• Description: Paper feed jam (error code 391: 1st tray)
• Remedy: (3-1-1) Check condition of the paper running path Paper running path of the front unit Open the front cover check if paper is not jammed in the paper running path. Remove the jammed paper. (3-1-2) Check condition of the mechanical parts Hopping sensor and IN sensor lever check Check the sensor lever shapes and operations for any problem. Replace the sensor lever(s) with proper one(s). (3-1-3) Check condition of electrical parts Check the detection condition of the sensor signal. Confirm that the sensor signals are normally detected by using the Maintenance Menu SWITCH SCAN function. Replace the CU/PU board, or appropriate sensor(s) or connection cord(s) Hopping sensor and IN sensor output level check Check the following signals by using the CU/ PU board HPSNS and RGSNS connector : HPSNS pin 2: Hopping sensor RGSNS pin 5: IN sensor Check that the above signal levels are changed by operating the levers of the sensors. Replace the CU/PU board.

• Code: 400
• Description: Paper size error (error code 400)
• Remedy: Jam occurs when paper end is located near the hopping sensor.
  (9-1-1) Check paper feed condition Multifeed of papers Open the top cover and check if multifeed of papers occurs or not. If the multifeed occurs again after the jammed paper is removed, replace the roller of the tray in use. Paper size Does the paper size specified for print match the paper size of paper stuck in the tray. Change the specified paper size or size of paper inside the tray. Hopping sensor Check if shape and movement of the sensor levers have any abnormality or not. Replace the sensor lever with the good sensor lever.

• Code: 540, 541, 542, 543
• Description: Toner cartridge cannot be recognized. (error code 540, 541, 542, 543)
• Remedy: Consumable items installation condition ID unit and toner cartridge Check that the ID unit is installed in the normal position. Check that the lock lever of the toner cartridge is locked. Correct the installation to the normal installation condition.