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

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*** URGENT WARNING, CHANGING INK TANKS [product design defect]

BEWARE... THIS PRODUCT IS DESIGNED TO DESTROY ITSELF: If you leave the ink tank cover latch* open for 10 minutes, the open print head carriage will shoot to the side and smash against the chassis, stripping the gears on the print head drive mechanism. Canon refuses to acknowledge or address this problem. Attention lawyers: this is a good case for a class action/product-recall lawsuit. * Reference "Easy Setup Instructions" Paragraph 5, Section 2 (Image 2 of 3)

Posted by bob smith on


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I have the same problem when i fill my tanks, that after 10 minutes the printerhead carrige moves to the right and get stock. So Jimpom you maybe learn someting every day? dont you think. Regards Uffe

Posted on Sep 09, 2007



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Can anyone coroborate this? Anyone else run into this problem? Doctor Who - what does the reference refer to? SG

Posted on Jun 25, 2006


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Related Questions:


I filled the Epson genuine black ink but the orange light in the ink indicator blinking and the status of black ink shows only 1%. please help. Printer is Epson L210

Did you refill the cartridge? If so, then you will need to reset a chip on the cartridge somehow. Usually epson doesn't sell "refill" ink unless it is an EcoTank series printer.

Why does my canon pixmar IP4200 keep saying two

Maybe one ink chip is faulty. Try to remove one and leave in the other (do the same for each one) to see if printer says something different. Otherwise your ink sensor could be broken.

Getting error U043 "The following ink tank cannot be recognized. I have the correct tank. Pixma 520 ...tank # 5 PGBK


The little chips on the front of the cartridge create a trouble for people trying to refill the cartridge, as of right now, there is no way to easily reset the chips. If you refill them, they still register as empty, and therefore don't work.

If the following tips doesn’t help, you can try to install the original new ink cartridge following the instructions in the user manual. This can solve the problem.
Note :
Be sure to install the ink tanks in the correct order indicated by the label on the Print Head Holder. The machine will not print if an ink tank is installed in the incorrect position.
For information on the compatible ink tanks, refer to the back cover of the Quick Start Guide.
Tips before Replacing Ink Tanks : Important:
- To maintain optimal printing quality, we recommend the use of specified Canon brand ink tanks.
Refilling ink is not recommended.

- Once you remove an ink tank, replace it immediately. Do not leave the machine with ink tanks removed.
- Replace empty tanks with new ones. Inserting partially used ink tanks may cause the nozzles to clog. Furthermore, with such tanks, the machine will not be able to inform you when to replace the tanks properly.
- Once an ink tank has been installed, do not remove it from the machine and leave it out in the open. This will cause the ink tank to dry out, and the machine may not operate properly when it is reinstalled. To maintain optimal printing quality, use an ink tank within six months of first use.
- Color ink may be consumed even when printing a black-and-white document or when black-and-white printing is specified.
Color ink is also consumed in Print Head Cleaning and Print Head Deep Cleaning, which may be necessary to maintain the machine's performance. When an ink tank is out of ink, replace it immediately with a new one.

After replacing ink tank;
Turn off the machine, and unplug the power cord of the machine from the power supply. After five minutes or more, plug the power cord of the machine back in, and then turn on the machine.

If you would like to vote for the answer, this will help the others to see the similar problems solved and also will be a satisfaction factor for me to continue helping you.
All the best.

My printer sends an error message u150 indicating the black ink cartridge cannot be recognized. I have used the same cartridge for some time and it still has ink in it.

Same problem, found two solutions, one temporary and one permanent.

Temporary - Open the top case, the ink tank giving the error will not be lit. Remoe and re-insert it. Close the printer. Usually takes one try, sometimes multiple, but doing so will make the printer recognize the ink tank.

Permanent - You'll love this one, it's a trick that cost Sony millions in the mid 90s, and eventually forced them to refine their product. Simply head to Wal-Mart, and buy a new ink-tank to replace your defective one.

Now, place the defective one in the box, and take THAT back for a full refund. Explain how it's defective (printer won't recognize), and they send it back to Canon for a refund. This hurts Canon's bottom line, and if enough people do it, they'll put more effort into their ink tanks.
Thank you

Error messages: U150 + Ink tank errors have occured

Reset Canon MP600 to the Factory Setting
  1. Press the HOME button.
  2. Use the Easy-Scroll Wheel or the right/left arrow to select Settings, and then press OK button.
  3. Use the Easy-Scroll Wheel or the right/left arrow to select Device settings, then press the OK button.
  4. Use the Easy-Scroll Wheel (B) or the up/down arrow to select Reset settings, then press the OK button.
  5. Use the Easy-Scroll wheel or the up/down arrow to select Yes on the confirmation screen and then press OK.
  6. Press the HOME button to return to the HOME menu.

Wont recognize cartridge

i know this does not help solve the problem,
but it lets people know that this is a common problem.

Error messages: U150 + Ink tank errors have occured


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