Question about Canon PC-940 Black and White Copier

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When I copy - one side of whatever I copy doesn't copy. If I lay something face down on one side of the glass, it will copy. If I lay it down on the other side of the glass it won't copy.

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Make sure the copier is on level base and check the mirrors under the glass are not dirty or fogged up.. if you can assess the drum unit giver a few gentle rocks side to side and then try another copy the unit may be tilted and the toner going to one end. also there is probably a charge cleaner at the top of the unit you can pull in and out a few times.. I would look at the toner/drum side of things if it is faint on one side..

Posted on Jul 13, 2010

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Posted on Jan 02, 2017

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How to use the Copier only, instructions please?


copy machines work by running a light along under the glass
anything on the paper is reflected and the image is captured for reproduction
so place the printed surface face down on the glass

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How do I load a document in my fax Machine


If you are laying your original on a glass, like in a flatbed scanner, you lay it face down.
If your fax works like my printer, the printed surface is on the bottom tray face down. It It gets sucked into the printer under the roller, around the back of the roller and comes out in the upper tray over the roller and face up. You laid the paper face down.

I hope this might help resolve your question.

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First, find a sturdy flat surface. You will be laying the monitor on it's face - face down so get a towel, blanket or something soft to cushion the monitor on the flat surface.
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There are two black machine screws on the back on the plate that is part of the stand. Remove these screws and the stand will slide free.

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When the printed paper comes out of the printer, there is a white line down the middle where the ink doesn't get on the paper Canon MX310


I presume this happens when you are copying and not just printing from the PC. If so then you probably have tippex on the scanner glass. open the scanner cover and you will see two glasses. the left one is for the adf and the larger one on the right is for the flatbed. I bet you have tippex or something white laying on one of the glasses. To prove this all you need to do is make a copy from the adf and make a copy from the flatbed. The adf one will probably have the white line and the flatbed will not.

Simples...

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1 Answer

I have an Officejet 5510 all-in-one printer/scanner/fax. When do a manual print (laying paper face down on glass), it works fine. When I use the automatic feed the copies have black lines along the entire...


You need to inspect and clean the narrow glass and the white reference bar that sits above the narrow glass. Scratches, whiteout, and debris will cause the lines on scanned documents.

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I have an HP J6480 printer, Fax copier, when I fax or copy a black line is down the center of the sheet. I replaced the toner. How do I fix it?


There is something stuck on the scanner glass. To test for this problem try making a copy by laying your original on the glass and making your copy, not running it through the feeder. If it copies fine from the glass it is definately something in the feeder/scanner glass. Just clean it with a soft cloth and some glass cleaner. You should be lookig for a thin strip of glass to the left of the large glass. Or you might have to open up the feeder unit and find it there.

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2 Answers

Faxing


if using the feeder probably face up as it will likely pull the document in and invert it to lay face down on the scanning glass.

if you lift up the feeder (like lifting the top of a copy machine), then it would be face down on the glass.

there should be an image on the feeder illustrating how the document should be placed - if it looks like a page with lines on it with a bent corner then it is face up.

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1 Answer

Stripe on copy


When you copy through the ADF, the machine scans over what is called the '**** glass'. If you lift the ADF you will see a thin strip of glass that runs front to rear, just to the side of the original glass.
You must clean the glass--- probably white-out, ink, etc... also look to see if a piece of paper, staple, etc.... is laying over the glass. When something is on the glass, the machine scans it down the page.

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1 Answer

How do I stop a black line appearing on the copy of an original document


Try this- Make sure the whole glass area of the copier is covered with white paper,
ie. lay the document face down, and any glass area you can still see- cover with sheets of blank white paper
Good luck

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1 Answer

Line on page using ARDF


Good news!! This should be an easy fix.

If the line appears only when you are using the doc feeder, and it looks like a straight line that you have drawn with a ruller, then it is on the glass. Not the large glass where the copy lays, but the narrow glass. Make a copy using the ARDF, paying close attention to it's orientation (which side is up and which is down). Then, take the copy you made and lay it next to the narrow **** glass in exactly the same direction as it went through the feeder. Wherever your line is, there is something on the glass in that spot. Take your thumb and rub with a good bit of pressure in this spot. You might not see anything, but trust me, there is something there. It might be as small and transparent as a spot of ink. A flashlight will help. You might also try using rubbing alcohol on a soft cloth to clean it. Hope some of this helps,

Chad

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