Canon NP6320 Service Manual

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Contents

Canon NP6320 Service Manual Manual pdf 214 page image

CHAPTER 10 TROUBLESHOOTINGCOPYRIGHT © 1999 CANON INC. CANON NP6320 REV.0 DEC. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)10-3618. Blurred image19. Broad dark lines in cross feed directionAction1. Re-tension the cable.2. Replace the drivecable if it is twisted orfrayed.Clean the scanner railswith alcohol; then, applya small quantity of low-viscosity lubricating oil.Replace the gear.1. Check the drum drivegear.2. Check the ends of thedrum (where thespacer rollers contactit) for scratches or pro-jections.Check the developing as-sembly.Check the drum driveunit.YES/NOYESNOYESYESYESNOChecksDoes the cable overlap as it winds aroundthe drive capstan while the scanner ismoving? Is the tension of the cable alter-nately too slack and too tight?Does the scanner move smoothly when itis pushed gently by hand?Is the gear of the scanner drive systemmissing?Does the blurring occur at intervals ofapprox. 95mm?Does the blurring occur at intervals ofapprox. 63mm?Step12345CauseScanner drivecableScannersystem railScanner drivesystemPhotosensitivedrumDevelopinggearDrum drivesystemActionCheck from step 4.Check the scanning lampand lamp regulator.Check the toner coatingon the developing cylin-der of the developing as-sembly in which theproblem occurs.Check the scanner.Check the paper feeder.YES/NOYESYESYESYESNOChecksAre the dark lines always in the same posi-tion when Direct copies are made?Does the scanning lamp flicker when thescanner is moving forward?Is there any difference in the broad darklines on a black copy compared with on acolor copy?Does the position of the dark lines changeon a Reduce copy as compared with a Di-rect copy?Step1234CauseScanninglampLamp regula-torBlack devel-oping unitScannerblurringPaper feederblurringDownload Service Manual And Resetter Printer at http://printer1.blogspot.com