Oki Data CONFIDENTIAL43827101TH Rev.2 210 /7.5.2.(7) Duplex Print Jam(Error 370,371,372,373,383)(7-1)Duplex print jam occurs right after turning on the powerPaper running route in duplexunitCheck the sensor levers ofthe sensors of duplex.Check the state of sensorsignal detection.Confirmation TasksCheck to see if there is paper jammed on the running route.Open the front cover and see if there is paper jammed in themiddle of feeding through the duplex. Open the rear cover andsee if there is paper jammed in the reversal path.Draw out the duplex and see if there is paper jammed at theinsertion inlet to the Duplex. Open the running path cover of theDuplex and see if there is paper jammed inside.Check to see if the sensor levers demonstrate any abnormalshape or motion.Use the SWITCH SCAN function of the self-diagnostic mode tocheck to see if the sensor signals are detected normally.Check the state of signal detection in two cases: With a sheet ofpaper placed inside the duplex unit and with the paper removed.Action at NGRemove the jammedpaper.Replace the sensorlever with a normalone.Replace the duplexPCB, sensors orconnection cord.(7-1-1) Check of state of running route(7-1-2) Check of state of mechanical parts(7-1-3) Check of electrical partsConfirmation Items(7-2)Duplex print jam occurs in the Duplex entryDuplex solenoidSeparator DUP(Delivery/DUP-intakeswitching gate locatedimmediately after fuser unit)On/off timing of duplexsolenoidDup-IN sensor leverDup-IN sensorReversal transport pathConfirmation TasksConduct the Motor and Clutch Test of the self-diagnostic mode,and check the operating state of the Duplex solenoid.Conduct the Motor and Clutch Test of the self-diagnostic mode,and check visually the motion of the gate (EXIT SOLENOID).See if its motion is stiff, or its amount of opening/closing isabnormal.Conduct test print with the cover open, and see if the separatorDUP opens at the right timing.Open the rear cover, touch the Dup-IN sensor lever by hand,and see if its motion is stiffUse the SWITCH SCAN function of the self-diagnostic mode tocheck to see if the sensor signals are detected normally.Check to see if there are paper chips, burrs or any other foreignmatters in the reversal transport path that obstruct the runningof paper.Action at NGReplace the duplexPCB or solenoid.Replace the separatorDUP.Replace the WRsensor lever orsolenoid.Replace the Dup-INsensor lever.Replace the duplexPCB, sensors orconnection cord.Remove the foreignmatters.(7-2-2) Check of operating state of sensor lever(7-2-1) Check of operating state of solenoid(7-2-3) Check of state of running routeConfirmation Items
