Question about Canon imageRUNNER 400S Copier

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Ask i have a black line on the paper

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Make on copy in the dockfeeder,and one copy on the platen glass.If you only have a line on the one copy make by the dockfeeder,the small glass next to the platen glass is dirty.Clean with spirits.

Let me know.

Posted on Oct 31, 2008

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This was posted 2 years ago by Shadyman.
The foam he is talking about is underneath the gray metallic strip that you see when you open the cover.
I used strips of electrical tape to cover that area where the ink is being picked up.
You can open the cove more by dislodging the piston on the right side. Needs two people, one to push the flaps apart and the other to pull the joint out.
Cut a 4 inch long strip, than fold the tape on it self such that there is about 3/4 of sticky tape left. This will allow you to push that portion underneath the metal strip where the paper normally would go. Place it at the location where the black line is (on the Paper). This will create a barrier between the foam and the paper as it moves by. ( I just had to figure out how I can do that)
Secure the tape by taping it on the the black bar, the one with the little fins on it.
I was able to push the tape down a little gap between the black bar and where the white rollers are. Make sure that the tape lays as flat as possible on that bar.
You may need to use two tape strips to cover the area..
I can also see my strips as I look from the outside at the **** where the paper comes out the printer onto the tray.
I guess the the foam swells up and hits a roller, which than offset prints the ink onto the underside of the paper.
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I know it's a fix, not a repair, but it works so fare.
Thanks to Shadyman for leading me in the right direction.

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I called the local Canon printer repair facility, and a serviceman said that the black line is caused by too much ink in the ink absorber device below the paper path. He said to fix it requires disassembling part of the printer, replacing the absorber foam, installing a longer tip for the excess ink, and reassembling and testing the printer. I asked if this would be a permanent fix. He said no, that the problem could reoccur as the absorber foam would eventually fill up again.

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