OKI ES7412
Troubleshooting. Paper feed jam (error code 390: Multipurpose tray) 1
Jam occurs immediately after the power is turned on. (Multipurpose tray)
Check condition of the paper running path
Check item | Check work | Actions to be taken at NG |
---|---|---|
Paper running path of the multipurpose tray | Check if paper is jammed or not in the paper running path. | Remove the jammed paper. |
Check condition of the mechanical parts
Check item | Check work | Actions to be taken at NG |
---|---|---|
Check the sensor levers of the paper entrance sensor 2 and the WR sensor. | Check if shape and movement of the sensor levers have any abnormality or not. | Replace the sensor with the good sensor lever. |
Check condition of electrical parts
Check item | Check work | Actions to be taken at NG |
---|---|---|
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 (RSF PCB) or connection cable. |
Check the sensor output signal level of the paper entrance sensor 2 and the WR sensor. | Check for the following signals at the FSNS connector 13 of the CU/PU board. Pin-2: WR sensor Pin-3: Paper entrance sensor 2 Confirm that the above signal levels change when the sensor lever is operated. |
Replace the front sensor board (RSF PCB) |
Check the power voltages supplied to the front sensor board (RSF PCB) | Check the 5V power at the CN connector 18 of the front sensor board (RSF PCB). Pin-1: 5V power supply Pin-5: 0VL |
Replace the connection cable. |