Oki Data CONFIDENTIAL43967002TH Rev. 1 336 /7. Troubleshooting(7-3) Paper unloading jam occurs in the middle of paper running path.Check item Check work Action to be taken at NG(7-3-1) Motor operation checkFuser motor Confirm that the fuser motor worksnormally by using the Motor & Clutch Testof the self-diagnostic mode.Check if any extra load exists or not.Replace the PUPCB or fuser motoror fuser unit. If anyattempt of usingnew fuser unit asa trial is going tobe made, be sureto use the SystemMaintenance MenuFUSE KEEP MODE.7.5.2.(8) Two-sided printing jam (error code: 370, 371, 372, 373, 383)(8-1) Two-sided printing jam occurs immediately after the power is turned on.Check item Check work Action to be taken at NG(8-1-1) Check the condition of the paper running pathPaper running pathof the Duplex unitCheck if paper is jammed or not in thepaper running path.Open the front cover and check if anypaper remains in the Duplex feeder or not.Open the rear cover and check if any paperremains in the paper reversing path or not.Remove the Duplex unit. Check if anypaper exists in the Duplex insertion slot ornot. Open the cover of the Duplex paperrunning path and check if any paperremains inside of the Duplex unit.Remove thejammed paper.(8-1-2) Check condition of the mechanical partsCheck the sensorlevers of therespective sensorsof the Duplex unit.Check if shape and movement of thesensor levers have any abnormality or not.Replace the sensorlever with the goodsensor lever.(8-1-3) Check condition of electrical partsCheck 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.
