OKI C941dp
Troubleshooting. 6 aper feed jam (Error 390: MP Tray)
Jam occurs immediately after paper feed is started. (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. |
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 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 | Check if shape and movement of the sensor levers have any abnormality or not. | Replace with a normal sensor lever. |
Right side cover | Confirm that the locks in the right and left of the right side cover are locked normally. | Replace the Right side 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. |
Motor operation check
Check item | Check work | Actions to be taken at NG |
---|---|---|
Hopping motor | Confirm that the hopping motor works normally by using the Motor & Clutch Test of the self-diagnostic mode. | Replace the PU/CU PCB or hopping motor. |
Hopping motor driver | Confirm that the hopping motor works normally by using the Motor & Clutch Test of the self-diagnostic mode. | Replace the PU/CU PCB. |
MPT clutch | Remove the HOPM connector of the PU/CU PCB and check the following at the connector side. 1 MΩ or more between pin-1/-2/-3/-4 and FG. |
Check the system connection
Check item | Check work | Actions to be taken at NG |
---|---|---|
Hopping motor drive cable | Check the connection condition of the cable. Visually 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. Also check that cables are assembled without any abnormality. |
Normalize the connection condition. Replace with a normal cable. |
Hopping motor drive cable | Check that any cable is not pinched during assembling of the printer. Remove the HOPM connector of the PU/CU PCB and check the following at the cable side. Short circuit between pin-1/-2/-3/-4 and FG |
Replace the cable and normalize the assembled condition. |
Hopping motor | Remove the HOPM connector of the PU/CU PCB and check that a resistance of 10Ω or less can be measured between pin-1 and pin- 2 and pin-3 and pin-4 respectively at the cable side. | Replace the hopping motor. |