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I have a Canon MP780/MP750 printer which prints one or two…

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I have a Canon MP780/MP750...
I have a Canon MP780/MP750 printer which prints one or two lines and then misses several and then prints one or two more lines i have cleaned the printer heads and tried all of the maintenance procedures to no avail. What next ?
Submitted: 8 years ago.Category: Printers
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Answered in 18 minutes by:
6/24/2010
Technician: Andy, Elec & Comp pro replied 8 years ago
Andy
Andy, Elec & Comp pro
Category: Printers
Satisfied Customers: 23,538
Experience: 11yr exp, Comp Engg, Internet expert, Web developer, SEO
Verified
Hi

From the symptoms you are getting, its quite evident that the print heads are worned out with usage or have clogged totally.

Now "only" if printer is not in warranty, clean the print heads with some alcohol solvent or medical spirit. DO NOT use any water based solvent. You may soak the heads in solvent but not for too long.

If you already tried cleaning the print head / cartridge then there are only two possiblities :
1. The print heads are worned out with usage.
2. The cartridge you bought is faulty (less probable)

If the printer is in warranty then you should get it repaired by Canon for free. If not, you will have to buy new print heads from Canon.

To be very honest, these print heads are made of poor quality so that you need to replace them and Canon can make money. Thats why they sell cartridges at cheaper cost.

Canon Customer Support Center
Hours: Monday-Friday 10:00 a.m. - 10:00 p.m. ET, excluding holidays
Phone: 1-800-OK-CANON (toll free)
1-800-652-2666
TTD: 1-866-251-3752 (toll free)
Email: [email protected]

Feel free to ask any question or concern you may have. I will be glad to help you.

 

Please click "ACCEPT" to pay me for my work.


Positive Feedback and BONUS are always appreciated.


Andy

Andy
Andy, Elec & Comp pro
Category: Printers
Satisfied Customers: 23,538
Experience: 11yr exp, Comp Engg, Internet expert, Web developer, SEO
Verified
Andy and 87 other Printers Specialists are ready to help you
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Customer reply replied 8 years ago
hOW DO YOU REMOVE THE PRINTER HEAD ?
Technician: Andy, Elec & Comp pro replied 8 years ago
Hi,

Please do this :

Press the Open Button (1) to open the Paper Output Tray (2).



  1. Raise the Scanning Unit until it stops.

    1. Pull and hold the Scanning Unit Lever towards you, then raise the Scanning Unit.
    2. The Print Head Holder moves to the middle.



  2. Open the Inner Cover 1.



  3. Open the Inner Cover 2.



    CAUTION:

    a. Do not try to manually move or stop the Print Head Holder.

    b. Do not touch any metal parts.

  4. Press the ink tank's tab (1), then remove it from the slot (2).



    IMPORTANT:
    Handle ink tanks carefully to avoid staining clothing or the surrounding area.

  5. Lift up the lock lever and take out the print head.



  6. Again, place the print head back in position and press down the lock lever.



  7. Insert the ink tank into the empty slot on the print head. Press down gently on the ink tank until an audible click is heard. Make sure the ink tank is in the correct slot.



    IMPORTANT:

    a. Make sure that the ink tank is inserted in the slot that corresponds to the ink tank's color.

    b. If the ink tank is inserted in the wrong slot, perform two head refreshings.

  8. Close the Inner Cover 2.

  9. Close the Inner Cover 1.

  10. Pull the Scanning Unit Lever towards you to close the Scanning Unit.

Andy
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