Oki C710 Maintenance Manual

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

Contents

43856301TH Rev.3 165 /Oki Data CONFIDENTIAL 7. Troubleshooting and repair procedureCheck item Check work Action to be takenat NG(6-2-4) Check the system connectionPaper feed motordrive cable, IDmotor drive cable,belt motor drivecable, ID Up motordrive cable, fusermotor drive cableCheck the connection condition of the cables.PU board HOPSIZE connector , DC IDconnector , DCHEAT connector , BELT IDUP connector , RELAY connector .Check if the connector is connected in the half-way only or not, and check if the connector isinserted in a slanted angle or not.Check also that cables are assembled withoutany abnormality.Normalize theconnectioncondition.Replace thecable with thenormal cable.Paper feed motordrive cable, IDmotor drive cable,belt motor drivecable, ID Up motordrive cableCheck that any cable is not pinched duringassembling of the printer.Remove the BELT ID UP connector of the PUboard and check the followings at the connectorside.Short circuit between pin-1 – FGShort circuit between pin-2 – FGShort circuit between pin-3 – FGShort circuit between pin-4 – FGShort circuit between pin-5 – FGShort circuit between pin-6 – FGShort circuit between pin-7 – FGShort circuit between pin-8 – FGRemove the HOPSIZE connector of the PUboard and check the followings at the cable side.Short circuit between pin-1 – FGShort circuit between pin-2 – FGShort circuit between pin-3 – FGShort circuit between pin-4 – FGReplace thecable with thegood cablethat normalizesthe connectioncondition.Paper feed motor,belt motor, ID UpmotorRemove the respective connectors from theboard, and confirm that the following resistanceexists between the corresponding pins, at thecable side.PU board HOPSIZE connector 1Between pin-1 - pin-2 Approx. 3.4Ω or approx. 5Ω.Between pin-3 - pin-4 Approx. 3.4Ω or approx. 5Ω.PU board BELT ID UP connector 3Between pin-1 - pin-2 Approx. 6.1Ω or approx. 3.5Ω.Between pin-3 - pin-4 Approx. 6.1Ω or approx. 3.5Ω.Between pin-5 - pin-6 Approx. 3.4Ω or approx. 5Ω.Between pin-7 - pin-8 Approx. 3.4Ω or approx. 5Ω.Replace paperfeed motor, beltmotor, ID Upmotor.(6-3) Jam occurs in the middle of paper running path.Check item Check work Action to be takenat NG(6-3-1) 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.