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

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PIXMA MP780 I cant print out , have tried everything, even manual print head alignment, it said in LCD screen Change H Valve A -3 Regards Paul Bateman

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6 Suggested Answers

SOURCE: canon pixma mp780 - vertical line on printing

Not sure if this will help but there is a small glass panel to the left of your flatbed scanner- this must be clean or else I get a black vertical line in my printing.

Posted on Jul 27, 2007

  • 1 Answer

SOURCE: software for canon pixma mp780

i need the software for a canon pixma mp780 printer thank you

Posted on Nov 03, 2008

  • 1 Answer

SOURCE: Alignment of printhead on Canon Pixma iP4600

This is simply a case of the ink tanks not being pressed in hard enough. They do click in, as the manual instructs but, unless they are fully pressed in top and bottom, this problem occurs. It's a shame that the Canon manuals and even the support centre do not mention this simple solution.

Posted on Jan 26, 2009

Gletkin
  • 49 Answers

SOURCE: I keep getting this message

The print head is the carriage that holds the ink cartridges and has tiny nozzles on the bottom that spray the ink on your paper. The nozzles have to be aimed (aligned) either automatically, or in WinXP with the following manual process:

1 Left click on the start button
2 Open "Printers and faxes" on the Start menu.
3 Find your printer on the printer list and right click on it once.
4 Select "Properties" from the pop-up menu.
5 Click on the "Maintenance" tab at the top of the new window.

A selection page for all sorts of upkeep items is then shown. Manual alignment of the print head is one of the choices.

Posted on Feb 24, 2009

  • 92 Answers

SOURCE: The 3eBK head stopped printing.

Try below some steps which might help you resolve the problem.

Print Head Cleaning / Head Refreshing If the printed Nozzle Check Pattern is broken, missing, or a specific color is not printed, clean the print head.

  1. Press the <Menu> button on the printers operation panel repeatedly until [MAINTENANCE] appears in the LCD.
  2. Press the left [<] or right [>] arrow buttons to select the cleaning setting you want. Select [HEAD CLEANING] or [HEAD REFRESHING] for deep print head cleaning.

    Note: [HEAD REFRESHING] uses more ink than [HEAD CLEANING], so perform [HEAD REFRESHING] only when necessary.
  3. Press the <OK> button.
  4. Print a Nozzle Check Pattern and perform at least two Head Refreshings if the pattern is not correct.
If this does not help, try removing the print head and then install it again. Once place, dont forget to aligh the head. Following are the steps:

Reseat Print Head Reseating the print head is seldomly needed to be done.
  1. Press the Open Button (1) to open the Paper Output Tray (2).

    mp780_openbutton.gif
  2. 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.

      mp780_scanunit.gif
  3. Open the Inner Cover 1.

    mp780_innercover1.gif
  4. Open the Inner Cover 2.

    mp780_innercover2.gif

    CAUTION:

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

    b. Do not touch any metal parts.
  5. Press the ink tank's tab (1), then remove it from the slot (2).

    mp780_inktankremoval.gif

    IMPORTANT:
    Handle ink tanks carefully to avoid staining clothing or the surrounding area.
  6. Lift up the lock lever and take out the print head.

    mp780_ph_removed.gif
  7. Again, place the print head back in position and press down the lock lever.

    mp780_ph_inserted.gif
  8. 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.

    mp780_inktankclicked.gif

    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.
  9. Close the Inner Cover 2.
  10. Close the Inner Cover 1.
  11. Pull the Scanning Unit Lever towards you to close the Scanning Unit.
  12. Align the print head position after the print head is installed. You can align the print head position either automatically or manually. When automatic alignment does not work well, align the print head position manually.
Automatically Aligning The Print Head Position:
  1. Load A4-or letter-size plain paper in the paper support tray. Auto alignment cannot be performed when the Feed Switch is set to [CASSETTE].
  2. Press <Menu> repeatedly until [MAINTENANCE] appears.
  3. Press left or right arrow to select [AUTO HEAD ALIGN].
  4. Press <OK>. The print head position alignment pattern prints.
  5. Check the printed pattern. If the printed pattern matches the illustration, the print head position alignment is complete.
Manually Aligning The Print Head Position:
When automatic alignment does not work well, align the print head position manually.
  1. Load A4- or letter-size plain paper in the paper support or cassette.
  2. Select the paper source with <Feed Switch> button.
  3. Press <Menu> repeatedly until [MAINTENANCE] appears.
  4. Use left or right arrow to select [ALIGN PRINT HEAD].
  5. Press <OK>. A horizontal pattern is printed.
  6. Beginning from column A on the printout, enter checkmarks in the patterns that have the most solid image.

    mp780_alignment1.gif

    (1): Bad example (Least solid box)

    (2): Good example (Most solid box)
  7. Press left or right arrow to select the pattern number that you checked in column A on the printout in step 6.

    (A): Column
    (0): Select pattern number with most solid image
  8. Press <OK>.
  9. Repeat steps 7 and 8 to adjust columns B to L. When all the horizontal patterns are adjusted, you will be prompted to print a vertical pattern [PRINT VERT. PATTERN].
  10. Press left arrow. A vertical pattern is printed.
  11. Beginning from column M on the printout, enter checkmarks in the patterns that have the most solid image.

    mp780_alignment2.gif

    (1): Bad example (Least solid box)

    (2): Good example (Most solid box)
  12. Press left or right arrow to select the pattern number that you checked in column M on the printout in step 11.
  13. Press <OK>.
  14. Repeat steps 12 and 13 to adjust column N.
I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.

If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!

Posted on Apr 26, 2009

Pristonero
  • 119 Answers

SOURCE: Pixma MP780 has ''wrong cartridge'' fault.

ink tank

Posted on Sep 18, 2009

Testimonial: "Thank You. I purchased a new printhead and that fixed the problem. I needed to be sure of where the problem was before spending any money on the unit "

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You need to print an alignment page. After you print it, you will be able to align the page using the up and down arrows.

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www.devicemanuals.com/.../Canon/Canon-Multifunction-Injet-PIXMA-MP780-User-Guide-TkRBNU1UVT.html

safemanuals.com/annexe_Setup%20Instruction_CANON_PIXMA%20MP780-_E.htm

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You can copy and paste any of these links in your internet address bar under a new tab to take you to your manual page.

You will need to realign the alignment, and print an alignment page. Or reset printer.

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Prints every other line


Use the cleaning cycle first.If it completes do a nozzle check and then to align follow below.
You need to hook it up to computer to do a manual head align through the printer properties maintenance section.

Jun 19, 2009 | Canon PIXMA MP780 All-In-One InkJet...

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My daugther also has a Pix780 so I just replaced my print head with hers and now the colour prints great. I guess I'll try cleaning mine first and if that doesn't work, I'll purchase a new one when the dealer who services Canon opens on Tuesday. I could also buy one from the Canon website for something like $60. I copied the following from Canon's sites under the FAQs. Sounds like you may need to replace your printhead.

How does a Canon Printhead work?
The printhead delivers very small drops of ink onto the paper. The ink from the cartridge is transported via small tubes. Heating elements heat the tubes, creating a small bubble of ink. The heating element determines the size of the drop to be applied to the paper.

How do I know I may need to replace my printhead?
There are a few symptoms that may indicate printhead failure or a clogged printhead. If the following symptoms continue even after replacing the ink cartridges and trying the troubleshooting steps in your user's manual or those listed below, you may need to replace your printhead:
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  • Colors on the printed page are quite a bit different from what shows on the screen
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Why would the printhead have problems?
After hours of printing, the heating elements may fail after being turned on and off hundreds of thousands of times. The printhead can also become clogged or blocked with paper debris or solidified ink. If your print quality is poor or your printer will not print at all, it may be time to change your printhead.

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1 Answer

Canon pixma mp780


From the front panel (Macintosh and Windows)Press MENU or SETUP (depending on the model).
Press the right ARROW repeatedly until the display window reads Maintenance.
Press ENTER.
Press the right ARROW repeatedly until the display window reads Align Print Cartridges.
Press ENTER. The unit will begin the alignment process and the display window will read Printing Alignment Page
Verify that the alignment was successful after the page is complete.

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Try uninstalling/reinstalling the drivers.

Is the error light flashing?

From the printer utility can you print a nozzle check sheet or align the printhead?

Does it seem to be printing (feeding sheet and moving printhead) or nothing happening at all?

Try removing all the tanks, take out the head. If blocked try cleaning manualy by running warm water over the ink ports/printhead jets - dry off and reinstall.

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PIXMA MP780 "WRONG CARTRIDGE" MESSAGE?


PIXMA MP780 "WRONG CARTRIDGE" MESSAGE?
Here is what I did and it now works just fine.I turned off the printer and unplugged the power cord, and unplugged it from my computer. I then removed all the ink cartriges and removed the print Head I got some rubbing alcohol put it on some toilet paper and wiped down the back and bottom of the print head.Plugged everything back in and It now works better then ever.

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## 357 error is the ASF paper feed position error on the MP780.
I have the maintenance manual in pdf format I could email you, its a 5.6Mb file be warned :)
regards Paul
pduffyd@hotmail.com

Jan 16, 2008 | Canon PIXMA MP780 All-In-One InkJet...

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