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1st the basic cause of dark/grey copies DUST. Clean w/ alcohol cloth then dry cloth totally all mirrors and the platen glass both side. If still dark check the "Optic slit " right in the upper of your halogen lamp remove it, still dark Check your halogen lamp maybe it already oxidized. The last solution adjust the CVR .
go into the menu and look for copy/print settings. you should see an option to lighten or darken the copy. It should look like a ascending /descending slider. tap to the left for lighter or to the right for darker
Whenever you ask about any problem please explain in detail.There are couple of reasons behind the above mentioned problem.Its not clear that copies are all black (full black) or just dark in print density? or its giving a dark shade? As per asked question, the solution is Check the followings1-Scanner mirrors are dirty2-Drum is damaged or faulty3-Charging corona 4-LD unit5-Developer
it is very possible the dark line on your copies are being caused by the drum. it will all depend on how many copies are on it but without seeing one of the copies the best guess i can make is the drum.
does the lamp under the platen glass turns on when copying? if not you might need a new exposure lamp...but if you get an image but its very dark, if you are mechanically inclined you can clean the mirrors and lens and the bottom of the platen glass because after many years of use dust will make the optics dirty and cause the copies to be very dark. hope this helps.
IF YOU ARE ONLY GETTING THE LINES WHEN YOU PUT THE DOCUMENTS INTO THE TOP FEEDER AND NOT FROM PRINTNG TO COPIER OR IF YOU PUT A COPY ON THE GLASS UNDER THE DOC FEEDER AND NO LINES APEAR CHECK THE SMALL GLASS WINDOW UNDER THE DOC FEEDER THERE MAY BE SOME TIPEX OR INK RUBBED OFF AND LEFT ON THE GLASS THERE.. THISD MIGHT BE CAUSING THE STREAKS YOU CAN CHECK THIS BY PUTTING THE PAGE IN THE DOC FEEDER AND DOING A COPY AND THEN PUT IT ON THE GLASS PLATE UNDER THE LID AND DO A COPY OR IF HOOKED UP TO COMPUTER DO A PRINT JOB.. IN NO STEAK APPEARS YOU CAN BE SURE ITS ON THE THIN SCANNER GLASS.. GOOD LUCK ...a
canon is sensitive to dust,
turn off machicne take off top copy glass move scanning glass and wipe with a clean towel.
try adjusting the dark and light does it change? if it comes out better on light then the drum is the problem. ( getting old)
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