Remedy: Fuser unit jam occurs immediately after the power is turned on. Paper path of the fuser unit Check if paper is not jammed in the paper path. Remove the jammed paper. Check the sensor levers of the fuser IN sensor and the fuser EXIT sensor. Check if shape and movement of the sensor levers have any abnormality or not. Replace the fuser unit. Check the detection condition of the sensor signal. Confirm that the sensor signals are normally detected by using the [SWITCH SCAN] function of the self-diagnostic mode. Replace the CU/PU board (ME2 PCB) or connection cable. Check the output signal level of the fuser IN sensor and the fuser EXIT sensor. Check for the following signals at the FUSER2 10 connector of the CU/PU board. Pin-8: Fuser IN sensor Pin-11: Fuser EXIT sensor Confirm that the above signal levels change when the sensor lever is operated. Replace the fuser unit. Check the power voltages supplied to the fuser IN sensor, fuser EXIT sensor. Check the 5V power voltage at the FUSER2 10 connector of the CU/PU board (ME2 PCB). 9pin: 5V power supply 7,10pin: 0VL Replace the CU/ PU board (ME2 PCB) Fuser unit jam occurs at the way of paper path. Fuser motor Confirm that the fuser motor works normally by using the [Motor & Clutch Test] of the selfdiagnostic mode. Remove the fuser and visually check the rotate of roller and gear. Replace the CU/ PU board (ME2 PCB) or fuser motor or fuser unit. Detected temperatures of the fuser belt and the backup roller Check temperatures detected at the fuser belt and the backup roller in the self-diagnostic mode. Has abnormally low (lower than the room temperature) or high (250°C) temperature been detected? Replace the fuser unit, relay board (P6Z PCB) or CU/PU board. Fuser motor drive cable Check the connection condition of the cables. Check if the DCHEAT connector 4 of the CU/ PU board is connected in the halfway 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. Also check the connector connected with the fuser motor in the same manner. Replace the cable with the normal cable that normalizes the connection condition.
Code: 390
Description: Paper feed jam
Remedy: Jam occurs immediately after the power is turned on. (MP tray) Paper path of the multipurpose tray Check if paper is jammed or not in the paper path. Remove the jammed paper. Check the sensor levers of the paper IN2 sensor and the WR sensor. Check if shape and movement of the sensor levers have any abnormality or not. Replace the sensor with the normal sensor lever Check the detection condition of the sensor signal. Confirm that the sensor signals are normally detected by using the SWITCH SCAN function of the self-diagnostic mode. Replace either the CU/PU board or the front sensor board (RSG PCB) or connection cable. Check the sensor output signal level of the paper IN2 sensor and the WR sensor. Check for the following signals at the FSNS connector 18 of the CU/PU board. Pin-2: WR sensor Pin-3: Paper IN2 sensor Confirm that the above signal levels change when the sensor lever is operated. Replace the front sensor board (RSG PCB) oltages supplied to the front sensor board (RSG PCB) Check the 5V power at the FSNS connector 25 of the front sensor board (RSG PCB). Pin-1: 5V power supply Pin-5: 0VL Replace the connection cable. Jam occurs immediately after paper feed is started. (Multipurpose tray) Paper path of the multipurpose tray Check if paper is jammed or not in the paper 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. Check the sensor levers of the paper IN2 sensor and the WR sensor. Check if shape and movement of the sensor levers have any abnormality or not. Replace the sensor with the normal sensor lever. 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, the pickup roller, and the retard 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. Paper Hopping motor Confirm that the paper hopping motor works normally by using the [Motor & Clutch Test] of the self-diagnostic mode. Replace the CU/PU board, or replace the paper feed motor. Paper Hopping motor driver Remove the MOTERCL connector1 of the CU/PU board and check the following at the connector side. Several MΩ between pin-5 . FG. Several MΩ between pin-6 . FG. Several MΩ between pin-7 . FG. Several MΩ between pin-8 . FG. Replace the CU/ PU board. MPT clutch Carry out [Motor & Clutch Test] to check if the MPT clutch works normally. Paper Hopping motor drive cable Check the connection condition of the cable. Check if the MOTERCL connector 1 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 normal cable that normalizes the connection condition. Paper Hopping motor drive cable Check that any cable is not pinched during assembling of the printer. Remove the MOTERCL connector 1 of the CU/PU board and check the following at the connector side. Short circuit between pin-5 . FG Short circuit between pin-6 . FG Short circuit between pin-7 . FG Short circuit between pin-8 . FG Replace the cable with the normal cable that normalizes the connection condition. Paper Hopping motor Remove the MOTERCL connector 1 of the CU/ PU board and check that approx. 3.4Ω can be measured between pin-5 -pin-6 and pin-7 -pin-8 respectively at the connector side. Replace the paper hopping motor.
Code: 391
Description: Paper feed jam Jam occurs immediately after the power is turned on. (1st tray)
Remedy: Paper path of the front unit Open the front cover check if paper is not jammed in the paper path. Remove the jammed paper. Check the sensor levers of the paper IN1 sensor and the paper IN2 sensor. Check if shape and movement of the sensor levers have any abnormality or not. Replace the sensor lever with the normal sensor lever. Check the detection condition of the sensor signal. Confirm that the sensor signals are normally detected by using the [Self-diagnostic mode] - [SWITCH SCAN] function. Replace either the CU/PU board, the front sensor board (RSG PCB) or connection cable. Check the output signal level of the paper IN1 sensor and that of the paper IN2 sensor. Check for the following signals at the FSNS connector 25 of the CU/PU board. Pin-4: Paper IN1 sensor Pin-3: Paper IN2 sensor Confirm that the above signal levels change when the sensor lever is operated. Replace the front sensor board (RSG PCB) Check the power voltages supplied to the front sensor board (RSG PCB) Check the 5V power at the FSNS connector of the front sensor board (RSF PCB). Pin-1: 5V power supply Pin-5: 0VL Replace the connection cable. Paper path of the front unit Check if paper is jammed or not in the paper path. Remove the jammed paper. Check the sensor levers of the paper IN1 sensor and the paper IN2 sensor. Check if shape and movement of the sensor levers have any abnormality or not. Replace the sensor with the normal sensor lever. Check the feed roller, pickup roller and the retard roller assembly of the tray. 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 or the pickup roller has worn out or not. Replace the feed roller, the pickup roller and the retard roller assembly of the tray. Paper Hopping motor Confirm that the paper hopping motor works normally by using the [Motor & Clutch Test] of the self-diagnostic mode. Replace the CU/ PU board or the paper hopping motor Paper Hopping motor driver Remove the MOTERCL connector 1 of the CU/PU board and check the following at the connector side. Several MΩ between pin-5 . FG. Several MΩ between pin-6 . FG. Several MΩ between pin-7 . FG. Several MΩ between pin-8 . FG. Replace the CU/ PU board. Paper Hopping motor drive cable Check the connection condition of the cable. Check if the connector is connected in the halfway 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 normal cable that normalizes the connection condition. Paper Hopping motor drive cable Check that any cable is not pinched during assembling of the apparatus. Remove the MOTERCL connector 1 of the CU/PU board and check the following at the connector side. Short circuit between pin-5 . FG Short circuit between pin-6 . FG Short circuit between pin-7 . FG Short circuit between pin-8 . FG Replace the cable with the normal cable that normalizes the connection condition Paper Hopping motor Remove the MOTERCL connector1 of the CU/ PU board and check that approx. 3.4Ω can be measured between pin-5 -pin-6 and pin-7 -pin-8 respectively at the connector side. Replace the paper hopping motor. Paper feed clutch, registration clutch Check to make sure that the paper feed clutch or registration clutch works normally by using the [Motor & Clutch Test] of the self-diagnostic mode. Open the front cover so that the rollers can be seen to check. Replace the CU/ PU board, or replace the paper feed clutch or the registration clutch. Clutch cable of paper hopping Check the connection condition of the cable. Check if the connector is connected in the halfway 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 normal cable that normalizes the connection condition. Paper Hopping clutch Check that any cable is not pinched during assembling of the printer. Remove the HOPLC connector 2 of the CU/PU board and check the following at the cable side. Short circuit between pin-1 . FG Remove the HOPCL connector 2 of the CU/ PU board and check that approx. 240Ω can be measured between pin-1 and pin-2. Replace the clutch and assembly it again correctly.
Code: 400, 401
Description: Paper size error
Remedy: Jam occurs when paper end is located near the IN1 sensor. Multifeed of papers Open the front cover and check if multifeed of papers occurs or not. If multifeed occurs again after the jammed paper is removed, replace the retard roller of the tray in use. Paper size Does the paper size specified for printing matched with the paper size of paper set in the tray? Change the specified paper size or size of paper inside the tray. Paper IN1 sensor, paper IN2 sensor Check if shape and movement of the sensor levers is normality or not. Replace the sensor lever with the normal sensor lever.
Code: 540, 541, 542, 543
Description: Toner cartridge cannot be recognized.
Remedy: 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. Toner sensor Is the receptor of the toner sensor dirtied? Wipe off the dirty from the toner sensor. Confirm that the toner sensor works normally by using the [SWITCH SCAN] function of the selfdiagnostic mode. Place a white paper in front of the toner sensor, and check if the SCAN state changes or not. Replace the toner sensor board or CU/ PU board or the FFC between the toner sensor board and the CU/PU board. Fuse of CU/PU board Check if the F11 is cutting or not. Replace the CU/ PU board.