Question about Canon PIXMA MP750 All-In-One InkJet Printer

4 Answers

Canon Wrong Cartridge

Looks of problems like this but few answers. I have a Canon Pixma MP780 giving the wrong cartridge signal. The cartridges are now correct but no change and the levels are wrong. Tried cleaning the head but it will not auto clean nor do anything. Turning off and on did not help nore did pulling plug other than losing was was in memory.

Can change the head if this the issue but suspect the laser or whatever they use to check cartridges and levels.

Thanks, Ken

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  • 2 more comments 
  • brownkEHC May 30, 2008

    This got the ink levels correct but afterwards I first got a cartridge jamed warning which after checking it was not, got a wrong cartridge again.

    Next suggestions please.

    Thanks, Ken

  • brownkEHC May 30, 2008

    Yes, they are currently all Canon. One large black 3e and four smaller 6's. However, I had used a some of the smaller 3e's earlier for the color ones.

    Thanks

  • brownkEHC May 30, 2008

    If you can help please let me know as otherwise I will take it to a Canon repair center. We need it. If likely the head this easy to do.

    Thanks, Ken

  • brownkEHC May 30, 2008

    Tried the warm reset suggested by Benimur. Need more options or advice if likely the head or some other part.


    Thanks, Ken

    earlier posts

    posted by brownkEHC on May 30, 2008Report abuse


    Looks of problems like this but few answers. I have a Canon Pixma MP780 giving the wrong cartridge signal. The cartridges are now correct but no change and the levels are wrong. Tried cleaning the head but it will not auto clean nor do anything. Turning off and on did not help nore did pulling plug other than losing was was in memory.

    Can change the head if this the issue but suspect the laser or whatever they use to check cartridges and levels.

    Thanks, Ken

    Comment by brownkEHC, posted on May 30, 2008
    This got the ink levels correct but afterwards I first got a cartridge jamed warning which after checking it was not, got a wrong cartridge again.

    Next suggestions please.

    Thanks, Ken
    Comment by brownkEHC, posted on May 30, 2008
    Yes, they are currently all Canon. One large black 3e and four smaller 6's. However, I had used a some of the smaller 3e's earlier for the color ones.

    Thanks
    Comment by brownkEHC, posted on May 30, 2008
    If you can help please let me know as otherwise I will take it to a Canon repair center. We need it. If likely the head this easy to do.

    Thanks, Ken
    Solution #1posted on May 30, 2008

    Benimur

    Rank: Guru
    Rating: 86%, 1674 votes

    Hi,

    Have you tried a warm reset? If not, pls try:

    1. Go to the Service menu: Menu -> Scan -> Copy -> Scan
    2. Select "TEST MODE"
    3. Select "[8] ETC.."
    4. Select "[4] EEPROM CLEAR"
    5. Select all the options/features like"[1] INK COUNT" one at a time
    6) Press the [OK] key.
    7) Press the [Stop/Reset] key (returns you to the TEST MOD sub-menu))
    8) press the [ON/OFF] key (which resets the printer).

    Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

    Good luck and kind regards

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4 Answers

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Solutions for wrong cartridge signal.
Issue: ERROR LCD: WRONG CARTRIDGE

1. Reseat MP750 / MP780 print head
2. The Print Head may need replacing - MP780
3. Press ON/OFF switch to reset the multifunction device
4. The MP780 may require repair

Posted on May 30, 2008

  • 2 more comments 
  • Maanita Chadha
    Maanita Chadha May 30, 2008

    Reseating the print head is seldomly needed to be done.


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




    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.




    3. Open the Inner Cover 1.




    4. 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.


    5. 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.


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




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




    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.



      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 repeatedly until [MAINTENANCE] appears.


    3. Press left or right arrow to select [AUTO HEAD ALIGN].


    4. Press . 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 button.


    3. Press repeatedly until [MAINTENANCE] appears.


    4. Use left or right arrow to select [ALIGN PRINT HEAD].


    5. Press . A horizontal pattern is printed.


    6. Beginning from column A on the printout, enter checkmarks in the patterns that have the most solid image.



      (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 .


    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.



      (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 .


    14. Repeat steps 12 and 13 to adjust column N.


  • Maanita Chadha
    Maanita Chadha May 30, 2008

    ssue:
    ERROR LCD: WRONG CARTRIDGE





    Solution:
    The Print Head may need replacing - MP780






















    Replacing the print head

    The print head may need replacing if, after all print head and ink tank troubleshooting has been performed:


    • The nozzle test appears broken or to have horizontal white streaks.

    • One or more of the colors is missing from the Nozzle Test.

    • The colors are incorrect on the Nozzle Test.

    • A print head error is indicated on the unit.

    • The printer powers off when the print head is installed.



    If your printer is still under warranty:
    You may resolve the issue by taking your printer to an Authorized Service Facility ( Find a Service Location) , or,

    For
    toll-free technical support, please call 1 (800) 828-4040 during
    regular business hours (currently Monday-Friday 10:00 a.m. - 10:00 p.m.
    EST, excluding holidays).



    If your printer is no longer under warranty:
    For
    technical support, please call 1 (800) 828-4040 during regular business
    hours (currently Monday-Friday 10:00 a.m. - 10:00 p.m. EST, excluding
    holidays). Pay for support is required on all units outside their
    original warranty, unless covered by a Canon Extended Service Plan. If
    it is determined that the problem you are experiencing is due to a
    failure of the printer's hardware, the pay for support charge will be
    canceled. If your out of warranty printer is determined to have a
    hardware problem, you have the option to purchase, at discounted
    pricing and free next business day shipping , a new or refurbished
    product from our current product line, which includes units with
    Canon?s new ChromaLife inks, PIXMA Technology, and a limited
    manufacturer?s warranty.



    • You may purchase a print head* through an Authorized Service Facility ( Find a Service Location)
      , or by calling 1-800-828-4040 between 8:00 a.m. and 12:00 a.m.
      midnight, EST, Monday through Sunday. When calling, speak the phrase
      "order parts" when the speech routing system asks the reason for your
      call. You will immediately be routed to the Parts Desk for assistance.
      Be sure to have your model number (MP780) or part number (QY6-0049-000)
      ready for the sales person.

      * Please be aware that a print head may not correct the issue and the part is not returnable.







  • Maanita Chadha
    Maanita Chadha May 30, 2008

    Issue:
    ERROR LCD: WRONG CARTRIDGE





    Solution:
    Press ON/OFF switch to reset the multifunction device























    Reset the device when it is not functioning properly.

    If the device is not functioning properly or to clear memory, reset it.


    1. On the operator panel, press and hold the button for one second. (The display will go blank.)


    2. Wait approximately ten seconds and then press the button again.


    3. Wait until the device has completed its cycling process before submitting another job request.







  • Maanita Chadha
    Maanita Chadha May 30, 2008

    Issue:
    ERROR LCD: WRONG CARTRIDGE





    Solution:
    The MP780 may require repair



















    Unfortunately, the issue you describe seems to indicate that your
    product requires repair service. Canon has excellent service options
    and we are eager to provide any assistance you may need. Click the link
    below to locate an authorized service facility and obtain further
    instructions. Find a Service Location

    If
    you still have questions about the issue you are experiencing, a
    Technical Support Representative will be happy to answer any question
    you may have. You can contact us through the email link or phone
    numbers listed below.



    • Obtain Support by Email

    • For
      toll-free technical support*, please call 1 (800) 828-4040 during
      regular business hours (currently Monday-Friday 10:00 a.m. - 10:00 p.m.
      EST, excluding holidays).

      * There will be a pay for support charge if your product is out of warranty (see next section, below).


    • Toll-free TDD Support Line for the Hearing Impaired is available Monday - Saturday (excluding holidays) at 1-866-251-3752


    • Technical Support is available for Customers in Canada at 1-800-OK-CANON

    If your printer is no longer under warranty :



    • For
      toll-free technical support*, please call 1 (800) 828-4040 during
      regular business hours (currently Monday-Friday 10:00 a.m. - 10:00 p.m.
      EST, excluding holidays).

      *Pay for support is required on all
      units outside their original warranty, unless covered by a Canon
      Extended Service Plan. If it is determined that there is a hardware
      failure, you have the option to purchase a new or refurbished product
      from our current product line, which includes units with Canon?s new
      ChromaLife inks, PIXMA Technology, a limited manufacturer?s warranty,
      free next business day shipping and discounted pricing. If you elect to
      take this option, the pay for support charge will be canceled.

    So
    we may better assist you, please make sure that you can access your
    Canon product and have the following information available when you
    call:



    • Product model name and serial number.

    • Computer's operating system; for example Windows XP.

    • Message displayed when the problem occurred.

    • Steps you've already done to try to solve the problem.

    We
    look forward to helping you rectify the issue you are experiencing and
    are always available to provide any assistance you may need.








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  • Master
  • 2,267 Answers

Quite a few cannon printers seem to have problems after replacing the ink cartridges.
If your printer is less than a year old, still under manufacturers warranty. I would suggest to call canon to get them to fix it.
Good Luck.

Posted on May 30, 2008

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  • Master
  • 6,966 Answers

Hi,

Have you tried a warm reset? If not, pls try:

1. Go to the Service menu: Menu -> Scan -> Copy -> Scan
2. Select "TEST MODE"
3. Select "[8] ETC.."
4. Select "[4] EEPROM CLEAR"
5. Select all the options/features like"[1] INK COUNT" one at a time
6) Press the [OK] key.
7) Press the [Stop/Reset] key (returns you to the TEST MOD sub-menu))
8) press the [ON/OFF] key (which resets the printer).

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on May 30, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Canon Master
  • 3,614 Answers

Hi,

May i know if you use an original ink for your printer..?

Posted on May 30, 2008

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