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

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No matter how much i tell it to clean, the output

Canon MP780 (all in one)
no matter how much i tell it to clean, the output is crappy. the black output fades half way down the page. the color carts are all full now. help, i have to print my tax return

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How I fixed it. I took out all the ink carts and then removed the cartridge holder/print head. I sprayed the empty holder liberally with Isopril alcohol.
I shook it around to get all the liquid alcohol to run over all the parts. A lot of old ink washed out. (do this in a laundry tub or similar, not in the wife's kitchen sink). After I let it sit for around 10 minutes, I rinsed it out in cold water for about 5 minutes. I let it air dry for about 2 hours and then put the whole thing back together. It now prints just wonderfully.

Posted on Feb 10, 2010

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