19. The copy has horizontal fogging.20. The copy has poor sharpness.COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 11 TROUBLESHOOTING11-83CauseScanning lamp,Lamp regulatorScannerFeedingassemblyChecksDoes the problem occur at thesame location on all copies madein Direct?Does the scanning lamp flickerwhile the scanner is movingforward?Make reduced copies, andcompare it against ones made inDirect. Are the positions of theproblem different?Step123YES/NOYESYESNOYESActionGo to step 3.Check the scanninglamp and the lampregulator.Check the scanningsystem.Check the feedingsystem.CauseCopyboardglassMirrorScannerPhotosensitivedrumLens driveassemblyChecksIs oil found on the copyboardglass?Is the horizontal reproduction ratioin Direct mode as specified?Clean the scanning lamp,reflecting plate, mirror, lens, dust-proofing glass, and heat absorbingglass. Is the problem corrected?Replace the photosensitive drum.Is the problem corrected?Step1234YES/NOYESNOYESYESNOActionClean the copyboardglass.Adjust the distancebetween No. 1 mirrorand No. 2 mirror.End.End.Check the operation ofthe lens drive assembly.Download service manual and resetter printer at http://printer1.blogspot.com
