Oki Data CONFIDENTIAL45487001TH Rev.1 6-70 /6. Troubleshooting procedure6.5.3.(4) Black banding/black streaking in vertical direction(4-1) Thin vertical line (with color) (Refer to Figure 6-2 D.)Check item Check work Actions to be takenat NG(4-1-1) ID unit conditionFilming of the IDunitIs print attempted without toner? Replace tonercartridge withnew one. Ifreplacementdoes not solvethe problem,replace theID unit. If anyattempt of usingnew ID unit asa trial is goingto be made,be sure to usethe SystemMaintenanceMenu FUSEKEEP MODE.(4-2) Thin vertical line (without color) (Refer to Figure 6-2 F.)Check item Check work Actions to be takenat NG(4-2-1) LED head conditionLED head Is any foreign material attached on the lightemitting surface of the cell fox lens of the LEDhead?Removethe foreignmaterial.(4-2-2) Condition of paper running pathPaper running path Check that any burr that may scatter the un-fused toner on the paper running path doesnot exist.Remove theburr.6.5.3.(5) Periodic abnormalities (Refer to Figure 6-2 E.)(5-1) Periodic abnormality occurs in vertical directionCheck item Check work Actions to be takenat NG(5-1-1) CycleImage drum Check that the cycle is 94.3 mm. Replace the IDunitDeveloping roller Check that the cycle is 39.7 mm. Replace the IDunitToner feed roller Check that the cycle is 66.6 mm or 72.8 mm. Replace the IDunitCharge roller Check that the cycle is 37.7 mm. Replace the IDunitFuser belt Check that the cycle is 94.3 mm. Replace thefuser unit.Heat roller Check that the cycle is 90.3 mm. Replace thefuser unit.Transfer roller Check that the cycle is 51.5 mm. Replace theTransfer Roller.If any attemptof using newconsumableitem as a trialis going tobe made, besure to usethe SystemMaintenanceMenu FUSEKEEP MODE.
