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

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Change ink cartigates and will not print

I changed all the ink cart except the 6-yellow and now it looks and acts as if it is printing but nothing is printing out.

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Oke dear

you can try this site

THE SERVICE MANUAL FOR YOUR PRINTER *step by step instructions in repairing it) is here
http://www.nodevice.com/manual/Canon/page15.html

and here

http://www.nodevice.com/manual/newmans/1164257699mp750780smpdf/get13922.html


oke

Posted on Mar 23, 2008

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Posted on Jan 02, 2017

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Printer will not print dut to other color cartige. being empty.


The color cartridges print text that appears black by mixing the three primary colors (cyan, magenta, and yellow) to make composite black. To achieve a realistic black, large quantities of colored ink are used. Because black cartridges use much less ink to create a similar shade of black, they print more pages in black than the color cartridge.
If the color cartridges on the printer are next to empty, you will not be able to get perfect prints at all.

Please have the cartridges replaced to do the printing jobs again.

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Yellow ink is not printing properly


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Clean ink path to head on cyan color.


I had this problem and took a can of compressed air and blew it through the ink receiver (take the cartridge out) I had no yellow, 15 cleanings did nothing, tried this and it works like new. You have to use the long red tube that comes with the compressed air can, and place some pressure on the end of the ink receiver hole before you give it a blow of air.. Try that, give it a few more manual cleanings, mine worked great!

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Operating problem as described below


unplug mfc from power outlet. take all carts out and leave scanner open. wait a minute. replug to power. wait until machine demands carts. insert one after another and ANSWER display! Close cover.

NEVER change cart until mfc stopps printing (near empty is a reminder to buy new ones :-))

Jun 18, 2008 | Brother MFC 420CN All-In-One InkJet...

1 Answer

Changed all 3 colors and black---Red not printing


Print is brown: mingles yellow with bk and cyan and red.

Did you use generic ink? You have to use a set of original brother ink carts: dinsert the original carts. press menu then start b/w copy then fourtimes arrow-up. when machine is in maintenance mode press 7 then 6 then 4 then start b/w copy. machine will initiate the carts and do some power cleaning. whnen finished press 7 then 6 then 3 then start b/w copy. machine does a power purge. leave maintenance by pressing 9 then 9. Do run a test print. If you cant see any mag. do the power purge two days later. If your not lucky then (you cant see ANY mag squares on test print) the head is defective and needs replacemnt.

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1 Answer

My MFC-210C always says replace ink.


Try this: Unplug machine from power. Wait 5 min.  Open scanner cover and take the carts out of the holder. Close cover. Plug machine to power. Machine will cycle and demands the carts. Use all NEW carts: Insert carts as demanded and answer question shown on display.

Always print until machine STOPPS printing because of EMPTY cart. Change cart then and machine will print the rest of job!
Plz, never change carts when it says NEAR EMPTY: This will cause a lot of trouble ;-)

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1 Answer

Colors not print well


This could be because of a defective valve.

DO NOT CLEAN THE PIEZO PH WITH ANY SOLUTION EXCEPT ORINIGNAL BROTHER INK!!!! OTHERWISE YOU WILL DEFENETLY DESTROY THE PH!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Try this:

Place new carts into machine and make sure thy are secured.

Press menu then start bk copy then fourtimes arrow up. machine will be in maintenance mode and lights will flash. press 7 then 6 then 4 then start bk copy. machine will refresh ink within tubes and ph and do some cleaning. when done press 7 then 6 then 3 then start bk copy. machine will do a power purge.
Leave maintenance afterwards by pressing 9 then 9. Do run a test print by pressing ink etc.
If you still cant see any yellow and/or magenta the ph is defective and needs replacement.

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5 Answers

Not Printing


the problem you all have could be from the ink cartige or from the ink cartige holder , take out the cartige from the printer , if you can take out the cartige holder out too , spray the cartige holder with a glass cleaning solution so it pours out from its bottom side , spray the ink cartige bottom , wipe it with a tissue then swing it hardly downwards so ink is poured from its bottom then wipe it with a tissue .

Oct 17, 2007 | Office Equipment & Supplies

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