Oki C710 Maintenance Manual

Also see for C710: How to remove Jammed Paper Brochure & specs Safety and regulatory information

Contents

43856301TH Rev.3 164 /Oki Data CONFIDENTIAL 7. Troubleshooting and repair procedure7.5.2. (6) Paper running jam (error code 381:)(6-1) Jam occurs immediately after the power is turned on.Check item Check work Action to be takenat NG(6-1-1) Check condition of the running path.Paper running pathof the front unitCheck if paper is jammed or not in the paperrunning path.Remove thejammed paper.(6-1-2) Check condition of the mechanical partsCheck the sensorlever of the WRsensor.Check if shape and movement of the sensorlevers have any abnormality or not.Replace thesensor leverwith the goodsensor lever.(6-1-3) Check condition of electrical partsCheck the detectioncondition of thesensor signal.Confirm that the sensor signals are normallydetected by using the SWITCH SCAN functionof the self-diagnostic mode.Replace eitherthe PU boardor the frontsensor board(RSF PCB)or connectioncable.Check the sensorlever of the WRsensor.Check for the following signals at the FSNSconnector no. 16 of the PU board.Pin-2: WR sensorConfirm that the above signal levels changewhen the sensor lever is operated.Replace thefront sensorboard (RSFPCB)Check the powervoltages suppliedto the front sensorboard (RSF PCB)Check the 5V power at the CN connector no. 25of the front sensor board (RSF PCB).Pin-1: 5V power supplyPin-5: 0VLReplace theconnectioncable.(6-2) Jam occurs immediately after a paper is taken into printer.Check item Check work Action to be takenat NG(6-2-1) Check condition of the paper running pathPaper running pathon the belt.Remove the ID unit and check if paper isjammed or not in the paper running path.Remove thejammed paper.(6-2-2) Check condition of the mechanical partsCheck the sensorlever of the WRsensor.Check if shape and movement of the sensorlevers have any abnormality or not.Replace thesensor lever withthe good sensorlever.(6-2-3) Motor operation checkPaper feed motordriver, belt motordriver and ID motorConfirm that the paper feed motor, belt motorand ID motor work normally by using the Motor& Clutch Test of the self-diagnostic mode.Check if any load exists or not.Replace thePU board, orreplace thedefective motoramong paperfeed motor,belt motor andID motor, orreplace the IDunit or belt unit.If any attemptof using newID unit or newbelt unit as atrial is goingto be made,be sure to usethe SystemMaintenanceMenu FUSEKEEP MODE.Paper feed motor,belt motorRemove the BELT ID UP connector of the PUboard and check the followings at the connectorside.Several MΩ between pin-5 – FGSeveral MΩ between pin-6 – FGSeveral MΩ between pin-7 – FGSeveral MΩ between pin-8 – FGRemove the HOPSIZE connector of the PUboard and check the followings at the connectorside.Several MΩ between pin-1 – FGSeveral MΩ between pin-2 – FGSeveral MΩ between pin-3 – FGSeveral MΩ between pin-4 – FGReplace eitherpaper feedmotor, beltmotor or PUboard.