Question about Canon PIXMA MP780 All-In-One InkJet Printer

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Black 3e Cartridge

The Black 3e prints as if it is out of allignment. The are light blue/gray horizontal stripes throughout the page of my black printing pages. TOn some pages, the letters don't even show up, just a white streak.

When I print the test page from the printer maintenance, everytying looks good except the 3e also has a white stripe through it.

What can I do?

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It seems the black ink tank is not exactly on the Printhead and may be air in the pipe.
http://www.fixyourownprinter.com/forums/printer/40028

Posted on Jul 03, 2008

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Check the printer head and roller inside the printer

also check the nozzle because it may be clogged due to some
dust

Posted on Jul 03, 2008

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This is probably due to miss alignment, there is an option of test page which will be scanned to allign the cartridge, if ur's a all in one printer. This test page is printed at the first time and scanned instantly for first time operation.

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Brother MFC-6800 1. Prints with 3/8" blank vertical line down the entire page; 2. Prints with a couple of 1/16" blank vertical lines down the entire page; 3. Prints with some gray shadow...


This solution is unconventional but it worked for me. The black roller on my MFC had irregularities on it and was creating horrible printouts. I pulled out the drum and cartridge and cleaned the large black roller. I used furniture polish to make the roller very smooth. Now it prints really nice.

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Well if your warranty is expired, I guess you really have had the cartridge quite a while.


There are a couple of things (cartridge related) that could be the cause.

The toner can settle in the cartridge, so try removing the cartridge from the printer, and holding it drum downwards give it a good shake side to side.

If the cartridge was stored in too warm a place, the toner could have formed a solid lump. This situation can be made worse if the cartridge bag was opened (or not sealed properly), and the storage conditions were damp as well.

Was the cartridge still in a sealed bag unitl you recently put it in the printer ??

If not, the drum could have been affected by light exposure. This would cause lighter density on the page than you would expect, though I would have thought that part of the image on the page would be full density (as part of the drum would have been sheilded by the cartridge body - that part effectively being inside it).

Its also possible that the drum was a duff new one, (or not replaced) when the cartridge was remanufactured.

An original drum in these cartridges is a purple colour, aftermarket drums are blue, green, or blue-green.

The only conclusive way of checking the drum is by substitution unfortunatly.

It might still be worth having a word with your supplier (accepting that they don't have to do anything for you), they may value their reputation, and have enough faith in the quality of their product to want to know what has gone wrong n this case.

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hello..

You may be need to buy a new color cart., becuase the allignment page depend on the Yellow color when it become to scan..

or you can pring any allignment page from a friend and put it in the scanner instead that one you printed out....

Hope it's work
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