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

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Canon Pixma MP780 not printing/copying black

Was fine this morning, then I tried to photocopy my daughters hands and it did not give a clear image.
Can print in colour, but this is obviously not helpful.
Black 3e was new two weeks ago, and is a proper Canon ink cartridge. I have aligned heads, cleaned etc. Please help.

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You cannot get a "Clear Image" when you cannot, completely, remove any external light sources. Whenever one tries to copy any 3D object, it MUST exclude all external light, this can be very difficult, Often, you need to use some sort of White opaque cloth, and surround whatever the 3D object is. Now the Scanning and Printing are independent from each other, you can get a perfect scan, but for whatever reason, the printer makes a bad print. When you printed, you may need to print in "Greyscale" this can be selected, from the "printer Properties" menu. Also when you "Scan" you MUST select, weather or not, you scan in Black & White, or Color. usually if you Scan in B&W, it will also print in B&W. However if Color was chosen, then the printer will attempt to print using the color cartridges, and "Mix" the Black & White, from the palette, whereas with plain B&W, it ONLY uses the Black, ink cartridge.

http://www.retrevo.com/support/Canon-MP780-Multifunction-Printers-manual/id/259bh643/t/2/
http://rapidshare.com/files/36633254/Canon_PIXMA_MP750_MP780_SERVICE_MANUAL.rar
Service manual for your printer above, above that is the user manual.
Use the Service manual, and work through, the troubleshooting and set it all up again. Do a "Reset' on the printer, and make sure you do ALL alignment and cleaning of the heads, also empty the ink overflow tank too, this sometimes helps too.

Posted on Apr 26, 2010

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Posted on Jan 02, 2017

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