OKI ES9431dn
Troubleshooting. 4 Paper feed jam (Error 391: 1st Tray) 2
Jam occurs immediately after the paper feed is started. (1st tray)
Check condition of the paper running path
Check item | Check work | Actions to be taken at NG |
---|---|---|
Paper running path of the 1st tray unit | 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 1st tray paper entrance sensor. | Check if shape and movement of the sensor levers have any abnormality or not. | Replace with a normal sensor lever. |
Check the feed roller, pickup roller and the retard roller 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 of the tray. |
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 | 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 |
Replace the PU/ CU PCB. |
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. |
Clutch operation check
Check item | Check work | Actions to be taken at NG |
---|---|---|
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 Tray 1 side cover so that the rollers can be seen to check. |
Replace the PU/CU PCB, or either paper feed clutch or registration clutch. |
Check the system connection
Check item | Check work | Actions to be taken at NG |
---|---|---|
Clutch cable for paper feed | 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. |
Cable for paper feed clutch | Check that any cable is not pinched during assembling of the printer. Remove the HOPCL connector of the PU/CU PCB and check the following at the cable side. Short circuit between pin-1 – FG Remove the HOPCL connector of the PU/CU PCB and check that approx. 240Ω can be measured between pin-1 and pin-2. | Replace the clutch and assembly it again correctly. |