OKI C931dp
Troubleshooting. 7 aper running jam (Error 381) 2
Jam occurs immediately after a paper is taken into printer.
Check condition of the paper running path
Check item | Check work | Actions to be taken at NG |
---|---|---|
Paper running path between the registration roller 2 and the fuser | 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 lever of the paper entrance sensor 3 and EXIT1/EXIT2/ EXIT3 sensors. | Check if shape and movement of the sensor levers have any abnormality or not. | Replace with a normal sensor lever. |
Motor operation check
Check item | Check work | Actions to be taken at NG |
---|---|---|
Feed motor driver and belt motor driver | Confirm that the hopping motor, belt motor and fuser motor work normally by using the Motor & Clutch Test of the self-diagnostic mode. Check if any load exists or not. |
Replace the PU/ CU PCB, the faulty motor of either feed motor or belt motor, or the belt unit. |
Feed motor, REG2 Clutch | Remove the FDMRG2CL connector of the PU/CU PCB 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 |
Replace the PU/ CU PCB. |
Check the system connection
Check item | Check work | Actions to be taken at NG |
---|---|---|
Feed motor drive cable, belt motor drive cable, fuser motor drive cable | Check the connection condition of the cables. PU/CU PCB FDMRG2CL connector, DCBELT connector, DCHEAT connector Visually check if each connector is connected in the halfway only or not, is inserted in a slanted angle or not. Also check that cables are assembled without any abnormality. |
Normalize the connection condition. Replace with a normal cable. |
Feed motor drive cable, belt motor drive cable, registration clutch 2 driver cable | Check that any cable is not pinched during assembling of the printer. Remove the FDMRG2CL connector of the PU/CU PCB and check the following at the cable 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 Remove the DCBELT connector and check the following at the cable side. Short circuit between pin-1/-2/-3/-4/-5/-6/ and FG Short circuit between pin-2 – FG |
Replace with a normal cable and normalizes the assembled condition. |
Feed motor, registration2 clutch | Remove the respective connectors from the PCB, and confirm that the following resistance exists between the corresponding pins, at the cable side. PU/CU PCB FDMRG2CL connector Between pin-1 and pin-2: Approx. 3.4Ω Between pin-3 and pin-4: Approx. 3.4Ω PU/CU PCB Between pin-5 and pin-6: Approx. 240Ω |
Replace the feed motor or belt motor. |