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

1 Answer

PIXMA MP780 Canon Copier skipping lines

Hi,

We have been successfully using our copier all day. All of a sudden, a copy came out with lines missing. The area that had no ink on it at all was equal in size to that of college ruled lined paper. Coincidently, the last successful copy we made was of a paper on college lined paper. The copies since then have gotten progressively worse to the point of having almost no ink on the paper at all.

Also, the machine has started squeeking.

Any thoughts.

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  • 2 more comments 
  • Anonymous Mar 27, 2008

    copier prints 4 lines then look as if it erased the fifth line. this pattran

    goes on andon, replaced both black inks, please help me I need my

    printer.

  • Anonymous May 06, 2008

    My problem is the same. been usen my printer for three years with

    no problem, then it started; it prints two to three lines then earses the

    neck three are four line. I put in freash ink, took it apart and cleaned.

    in doing some reserch and reading some others problem.



    now i still need to locate the device that will clear this up. if you could

    steer me to find this I would be most appreciated.

  • Anonymous May 08, 2008

    Yes I have the same problem. it will scan,copy and print. The problem

    is the same it will print two to three lines then looks to erase the next

    line. I cleaned the head and installed new ink and they same problem

    still is there. Plan to drive in to STL to get a new printer head to see if

    if that will clear this problem. I will keep you posted on my progress. Len

  • Anonymous May 18, 2008

    I have the same problem. tring to get more info I found out that this

    could be in the printer head. replacement of this is around $31.00 put

    i am not sure that this could be the problem. I would like to know if

    this is the real heart of my problem don't want spending good money

    for something that might not work.

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  • 1 Answer

Try cleaning printhead (google it you find it) make sure you attempt cleaning with Windex ammonia D (overnight solution)

If not you may have to replace Printhead (Plastic Box, cartridges snap into) sometimes the resistor will burn out.
1-800-828-4040 (Direct from Canon $31 + shipping)

If that doesn''t work contact www.usa.canon.com and find authorized printer repair. location. I am having same problem!!!

Posted on Mar 31, 2008

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1 Answer

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Hi rksde,


First of all, thank you for purchasing the service/repair manual of Canon Pixma MP780.

Please email me at mjsvillanueva23@yahoo.com, manual has 132 pages, it can't be uploaded here.
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Rating and feedback are highly appreciated!

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Toner


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