OKI C712
Troubleshooting. Paper feed jam (error code 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 front 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 levers of the paper entrance sensor 1 and the paper entrance sensor 2. | Check if shape and movement of the sensor levers have any abnormality or not. | Replace the sensor with the good sensor lever. |
Check the separator assemblies of the feed roller, the pickup roller and 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 separator assemblies of the feed roller, pickup roller and tray. |
Motor operation check
Check item | Check work | Actions to be taken at NG |
---|---|---|
Paper feed motor | Confirm that the paper feed motor works normally by using the Motor & Clutch Test of the self-diagnostic mode. | Replace the CU/ PU board or the paper feed motor. |
Paper feed motor driver | Remove the HP_PSZCL connector 9 of the CU/PU board and check the followings 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 CU/PU board. |
Check the system connection
Check item | Check work | Actions to be taken at NG |
---|---|---|
Paper feed motor drive cable | Check the connection condition of the cable. 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. |
Replace the cable with the good cable that normalizes the connection condition. |
Paper feed motor drive cable | Check that any cable is not pinched during assembling of the printer. Remove the HP_PSZCL connector 9 of the CU/ PU board and check the followings 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 |
Replace the cable with the good cable that normalizes the connection condition. |
Paper feed motor | Remove the HP_PSZCL connector 9 of the CU/ PU board and check that approx. 3.4Ω can be measured between pin-1 -pin-2 at the cable end, and that approx. 5Ω can be measured between pin-3 -pin-4 respectively. | Replace the paper feed motor. |
Solenoid operation check
Check item | Check work | Actions to be taken at NG |
---|---|---|
Paper feed clutch | Confirm that the paper feed clutch or regist clutch works normally by using the Motor & Clutch Test of the self-diagnostic mode. Remove the metal plate from the right side of a printer so that the clutch becomes visible. Then, check operation of the clutch. |
Replace the CU/PU board, or replace the paper feed clutch or regist clutch. |
Check the system connection
Check item | Check work | Actions to be taken at NG |
---|---|---|
Paper feed clutch cable | Check the connection condition of the cable. 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. |
Replace the cable with the good cable that normalizes the connection condition. |
Paper feed clutch cable | Check that any cable is not pinched during assembling of the printer. Remove the CL1 connector 11 of the CU/PU board and check the followings at the cable side. Short circuit between pin-1 – FG Remove the CL1 connector 11 of the CU/PU board and check that approx. 240Ω can be measured between pin-1 and pin-2. |
Replace the solenoid and reassemble the printer correctly. |