OKI C844dnwl
Troubleshooting. Paper feed jam (Error 390: MP Tray) 2
Jam occurs immediately after paper feed is started. (Multipurpose tray)
Check condition of the paper path
Check item | Check work | Actions to be taken at NG |
---|---|---|
Paper path of the multipurpose tray | Check if paper is jammed or not in the paper 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 IN2 sensor and the WR sensor. | Check if shape and movement of the sensor levers have any abnormality or not. | Replace the sensor with the normal sensor lever. |
Front cover | Confirm that the locks in the right and left of the front cover are locked normally. | Replace the font 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 driving check
Check item | Check work | Actions to be taken at NG |
---|---|---|
Paper Hopping motor | Confirm that the paper hopping motor works normally by using the [Motor & Clutch Test] of the self-diagnostic mode. | Replace the CU/PU board, or replace the paper feed motor. |
Paper Hopping motor driver | Remove the MOTERCL connector 1 of the CU/PU board and check the following at the connector side. 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. |
MPT clutch | Carry out [Motor & Clutch Test] to check if the MPT clutch works normally. |
Check the system connection
Check item | Check work | Actions to be taken at NG |
---|---|---|
Paper Hopping motor drive cable | Check the connection condition of the cable. Check if the MOTERCL connector 1 is connected in the half-way 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 normal cable that normalizes the connection condition. |
Paper Hopping motor drive cable | Check that any cable is not pinched during assembling of the printer. Remove the MOTERCL connector 1 of the CU/PU board and check the following at the connector side. Short circuit between pin-5 – FG Short circuit between pin-6 – FG Short circuit between pin-7 – FG Short circuit between pin-8 – FG |
Replace the cable with the normal cable that normalizes the connection condition. |
Paper Hopping motor | Remove the MOTERCL connector 1 of the CU/ PU board and check that approx. 3.4Ω can be measured between pin-5 -pin-6 and pin-7 -pin-8 respectively at the connector side. | Replace the paper hopping motor. |