Oki Data CONFIDENTIAL43967002TH Rev. 1 338 /7. Troubleshooting(8-4) Two-sided printing jam occurs during transporting paper inside the Duplex unit.Check item Check work Action to be taken at NG(8-4-1) Sensor lever operation checkDup-R, Dup-Fsensor leverRemove the Duplex unit and checkmovement of the sensor leverSensor leverreplacement(8-4-2) Sensor checkCheck the detectioncondition of thesensor signal.Confirm that the sensor signals arenormally detected by using the SWITCHSCAN function of the self-diagnostic mode.For all sensors except the Dup-IN sensor,check the detection condition of therespective sensor in the two status: One isthe status in which paper remains insidethe Duplex unit. The other is the status inwhich paper is removed from the Duplexunit.Replace the DuplexPCB (V7Y PCB),or replace thedefective sensor orconnection cable.(8-5) Paper is not supplied from the Duplex unit to the regist roller.Check item Check work Action to be taken at NG(8-5-1) Sensor lever operation checkDuplex clutch Confirm that the Duplex clutch worksnormally by using the Motor & Clutch Testof the self-diagnostic mode.Confirm it by listening to the sound.V7Y PCBreplacement orclutch replacement.7.5.2.(9) Paper size error (error code 400)(9-1) Jam occurs when paper end is located near the IN1 sensor.Check item Check work Action to be taken at NG(9-1-1) Check paper feed conditionMultifeed of papers Open the front cover and check if multifeedof papers occurs or not.If the multifeedoccurs again afterthe jammed paperis removed, replacethe flap of the tray inuse.Paper size Does the paper size specified for printmatch the paper size of paper stuck in thetray.Change thespecified paper sizeor size of paperinside the tray.Paper entrancesensor 1Check if shape and movement of thesensor levers have any abnormality or not.Replace the sensorlever with the goodsensor lever.
