OKI ES8434
Troubleshooting. Paper jam (Error 381) 2
Jam occurs immediately after a paper is fed into the apparatus.
Check condition of the paper path
Check item | Check work | Actions to be taken at NG |
---|---|---|
Paper path on the belt. | Remove the ID unit and check if paper is jammed or not in the paper path. | Remove the jammed paper. |
Check condition of the mechanical parts
Check item | Check work | Actions to be taken at NG |
---|---|---|
Check the sensor lever of the WR sensor , Fuser IN sensor. | Check if shape and movement of the sensor levers have any abnormality or not. | Replace the sensor lever with the normal sensor lever. Replace the fuser unit. |
Motor driving check
Check item | Check work | Actions to be taken at NG |
---|---|---|
Paper Hopping motor driver, belt motor driver and ID motor | Confirm that the paper hopping motor, belt motor and ID motor work normally by using the [Motor & Clutch Test] of the self-diagnostic mode. Check if any load exists or not. | Replace the CU/PU board, or replace the defective motor among paper hopping motor, belt motor and ID motor, or replace the ID unit or belt unit. |
Paper Hopping motor, belt motor | Remove the MOTERCL connector 1 of the CU/PU board and check the following at the connector side. Several MΩ between pin-1 – FG Several MΩ between pin-2 – FG Several MΩ between pin-3 – FG Several MΩ between pin-4 – FG 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. |
Check the system connection
Check item | Check work | Actions to be taken at NG |
---|---|---|
Paper hopping motor drive cable, ID motor drive cable, belt motor drive cable, fuser motor drive cable | Check the connection condition of the cables. CU/PU board (ME2 PCB) MOTERCL connector 1, DCID connector 3, DCHEAT connector 4, MOTERCL connector 1, RELAY connector 9 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 |
Normalize the connection condition. Replace the cable with the normal cable. |
Paper hopping motor drive cable, belt motor drive cable, hopping clutch drive cable | Check that any cable is not pinched during assembling of the printer. Remove the MOTERCL connector 1 of the CU/ PU board (ME2 PCB) and check the following at the connector side. Short circuit between pin-1 – FG Short circuit between pin-2 – FG Short circuit between pin-3 – FG Short circuit between pin-4 – FG Short circuit between pin-5 – FG Short circuit between pin-6 – FG Short circuit between pin-7 – FG Short circuit between pin-8 – FG Remove the HOPCL connector 2 of the CU/PU board and check the following at the cable side. Short circuit between pin-1 – FG Short circuit between pin-2 – FG |
Replace the cable with the normal cable that normalizes the connection condition. |
Paper hopping motor, belt motor, hopping clutch | Remove the respective connectors from the board, and confirm that the following resistance exists between the corresponding pins, at the cable side. CU/PU board (ME2 PCB) MOTERCL connector 1 Between pin-1 - pin-2: Approx. 3.4Ω Between pin-3 - pin-4: Approx. 3.4Ω Between pin-5 - pin-6: Approx. 3.4Ω Between pin-7 - pin-8: Approx. 3.4Ω CU/PU board HOPCL connector 2 Between pin-1 - pin-2: Approx. 240Ω |
Replace the paper feed motor or ID Up motor. |