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

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Canon MP780 print head won''t move automatically

Alarm light stays blinking. I've cleaned the print head, put it back, but it just sits there and doesn't move back into position. I have only Canon cartridges. Have had no paper jams.

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  • peppelina Dec 23, 2008

    My canon MP780 have the same problem the printhead won"t move at all

  • Anonymous Feb 07, 2009

    "Wrong Cartridge Error" but the printhead won't move if the cover is lifted. Thus I cannot access the printhead since it's hidden on the right corner.

  • eloseman Mar 17, 2009

    I have the same issue. None of my inks were out, and I did a double sided print job twice. First I got major clicking noises and then an alarm light with no error. I cleaned the print head and carriage and then it worked. I did another double sided job and now the carriage will not move at all. No clicking. No movement. Just the alarm light blinking and the screen says "Check printer. Hit ok". Nothing has worked to solve this. I treat my printer very well WHY is it acting up now? Please help.

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  • Canon Master
  • 5,568 Answers

THis may be a stupid suggestion but normally, you must open some housing part to force it to center for service or cartridge replacement and the closure of the same access part causes the carriage to return to its hiding place.
With the power on, gently push against the carriage in either direction. If it doesn't fight with you, the belt may be either off a pulley or torn.  

Posted on Dec 22, 2008

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Posted on Jan 02, 2017

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After many cleanings, head refreshings, and "head allignments" the color printing is very light...especially the black. I've put in all new inks and the print is still very light. The new ink...


Try putting a bit of isopropyl alcohol in the bottom of the cartridge holder where the ink goes through and letting it sit for a couple hours then putting the cartridges back in and running the cleaning cycle a few times.

The alcohol should help dissolve the dried ink in the print head.

Jan 07, 2011 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

My canon pixma mp780 does not print in color. I cleaned the printhead. It prints great in black and white, but no color comes out...and yes, their is ink in the cartridges.


CANON MP780 DOES NOT PRINT

This is what works for me. Try at your own risk. You may need to clean both areas.


CLEAN PRINTHEAD:

Perform a nozzle check using the Canon software under "maintenance." If the nozzle check prints successfully, the problem is most likely not with the printhead. Otherwise, 1) Lift up the lever above the ink cartridges. Take the ink cartridges out. Put them in a plastic zip lock bag. 2) The container in which the ink cartridges sit is removable. The container is inside the moving mechanism. The container is the printhead. Tilt it slightly and pull up. This should come out easily. 3) There are round pads under which the ink cartridges sit in the printhead you removed. The large one is black. On the underside of the printhead are small slits. The one separated from the others is black. Fill a syringe with Windex. a. Run warm water over the printhead until no more ink comes out. b. Fill the areas where the round pads are with Windex. c. Set the printhead on some paper towels. The liquid will soak through and come out the underside along with the ink. Repeat steps a-c until no more ink comes out, but at least 10 times. 4) Let the print head sit and dry for two hours. Put everything back in the printer. Unplug the printer. Plug in the printer. Turn the printer off. Turn the printer on. Do a clean cycle.


CLEAN PURGE MECHANISM:

You will need a light. 1) Unplug the printer and move the printhead all the way to the left. On the far right are two rectangular basins. The smaller one is black. Take your fingernail or a tweezers and lift out the sponge pad (do not drop it). Soak the sponge pad in Windex until it turns white. Plug in the printer. 2) Fill a syringe with Windex. a. Fill the basin with liquid. b. Let it soak for 5 minutes. c. Turn the printer off. d. Turn the printer on. Repeat steps a-d until you see a small hole in the basin. e. Put the syringe over the hole and fill the basin, pushing the liquid into the hole. f. Let it soak for 5 minutes. g. Turn the printer off. h. Turn the printer on. Repeat steps e-h 5 to 10 times. 3) Unplug the printer. Put the sponge pad back in using your fingers (do not drop it). Plug in the printer. Turn the printer off. Turn the printer on. Do a clean cycle.


#16

Dec 07, 2010 | Canon PIXMA MP780 All-In-One InkJet...

2 Answers

Nozzle test does not show pattern for either BLACK output; deep clean does not correct problem. both catridges have plenty ink. color displays are ok.


CANON MP780 BLACK DOES NOT PRINT

This is what works for me. Try at your own risk. I cleaned both areas.


CLEAN PRINTHEAD:

Perform a nozzle check using the Canon software under "maintenance." If the nozzle check prints successfully, the problem is most likely not with the printhead. Otherwise, 1) Lift up the lever above the ink cartridges. Take the ink cartridges out. Put them in a plastic zip lock bag. 2) The container in which the ink cartridges sit is removable. The container is inside the moving mechanism. The container is the printhead. Tilt it slightly and pull up. This should come out easily. 3) There are round pads under which the ink cartridges sit in the printhead you removed. The large one is black. On the underside of the printhead are small slits. The **** separated from the others is black. Fill a syringe with Windex. a. Run warm water over the printhead until no more ink comes out. b. Fill the areas where the round pads are with Windex. c. Set the printhead on some paper towels. The liquid will soak through and come out the underside along with the ink. Repeat steps a-c until no more ink comes out, but at least 10 times. 4) Let the print head sit and dry for two hours. Put everything back in the printer. Unplug the printer. Plug in the printer. Turn the printer off. Turn the printer on. Do a clean cycle.


CLEAN PURGE MECHANISM:

You will need a light. 1) Unplug the printer and move the printhead all the way to the left. On the far right are two rectangular basins. The smaller one is black. Take your fingernail or a tweezers and lift out the sponge pad (do not drop it). Soak the sponge pad in Windex until it turns white. Plug in the printer. 2) Fill a syringe with Windex. a. Fill the basin with liquid. b. Let it soak for 5 minutes. c. Turn the printer off. d. Turn the printer on. Repeat steps a-d until you see a small hole in the basin. e. Put the syringe over the hole and fill the basin, pushing the liquid into the hole. f. Let it soak for 5 minutes. g. Turn the printer off. h. Turn the printer on. Repeat steps e-h 5 to 10 times. 3) Put the sponge pad back in using your fingers (do not drop it). Unplug the printer. Plug in the printer. Turn the printer off. Turn the printer on. Do a clean cycle.

Nov 01, 2010 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

Won't print. Orange "alarm" light blinking. When I press the OK button, a thumping noise comes from inside the machine. Maybe ink cartridge container isn't sliding properly?


the ink cartridge head typically runs on a clear tape back and forth , it uses this tape for head positioning. often the tape gets dirty and the head cannot position its self, which causes the ink head to slam into it carriage limits, while trying to find it. solution is to simply and carefully wipe off the tracking tape with vinegar and water. do this while the machine is unplugged and off. Try to move the head around to clean the tape, dont pull or move the tape as it has to run "just so" through the print head. The tape runs all the way across the inkhead travel zone. you will see it. please provide some thumbs up if this helps you. Thanks. Cheers

Aug 26, 2010 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

6A00 found paper in place where cartridges sit and wait for a print job. Cleared the paper but still won't start. I have checked in all other possible places and no paper or scrap of paper to be found. Is...


Hi
Error 6A00
The 6A00 is a Canon generic code for paper path jam.

Solution 1:
Move the printhead carriage back and forth a few times.

Solution 2:
Check the purge unit: Moving the print head assembly will not clear a purge unit if its jammed with paper, paper clips, push pins, screws, cookie crisp, flower bud pods or the like.

Solution 3:
Press the ink pads down in the purge unit.

Mar 07, 2010 | Canon PIXMA MP830 All-In-One InkJet...

1 Answer

Canon mp780 has alarm flashing



Hi there

Error A600
Your A600 is a paper path error, usually related to the purge unit. Try checking the purge unit for paper stuck in it.

The 6A00 is a Canon generic code for paper path jam.
Some where in the paper path a sensor is activated indicating paper jam so the printer will give off a 6A00 code.
Almost 90% of the time is related to the purge unit being jammed with something and not being able to move.

Look for paper, paper clips, push pins, screws flower bud pods or the like.

The offending item needs to be removed or the purge unit needs replacement.

The purge unit, called a spittoon assembly in an HP, Lexmark, and other inkjet printers, is where the print head assembly parks when not in use, also its other job is to clean and make sure the print head is clean and open for printing. That is why you'll find the print head assembly parked on top of it. It also has an electrical pump to milk the print heads and test for ink flow.


The purge unit is a white plastic assembly (on the right side of the printer where the print head homes) that is spring loaded on rides on a rail.
You can try moving it back and forth about 5 times or so and clean the rail with a cleanex and putting a little bit of some light oil on it and then close everything up and try it.

If you found this useful all I ask is call back and just gave a vote, it will gave me some satisfaction to know am helping some one, so I will keep on helping.
All The Best: Pineworks

Feb 22, 2010 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

Alarm is blinking and computer is stating that


Hi
Error 6A00
The 6A00 is a Canon generic code for paper path jam.

Solution 1:
Move the printhead carriage back and forth a few times.

Solution 2:
Check the purge unit: Moving the print head assembly will not clear a purge unit if its jammed with paper, paper clips, push pins, screws, cookie crisp, flower bud pods or the like.

Solution 3:
Press the ink pads down in the purge unit.


All I ask is please come back and just gave a vote, it will gave me some satisfaction to know am helping some one so I will keep on helping.
All The Best: Pineworks

Feb 16, 2010 | Canon PIXMA MP780 All-In-One InkJet...

2 Answers

Canon pixma mp780 printing problem


If deep cleansing via software doesn't work then you've got to manually clean your print head unit. Sometimes you'll have to bite the bullet and get a replacement print-head unit ($$). If you're at the stage that you're considering replacement, then you've got nothing to lose by cleaning the print-head unit yourself. It's simple. Remove all ink cartridges first then remove the print head itself. Place the print head unit in a saucepan of warm (NOT boiling hot) water and leave to soak for an hour. (Protect your clothes - it gets messy) After an hour, flush the printhead unit under a running tap. Don't run the water too fast or you may damage the unit) You should flush until the water runs clear. Do not attempt to clear the nozzles with anything other than water - they are very fine needle jets and you will damage them!! If needs be, return to saucepan and leave to soak in warm water again and repeat process. When you are satisfied that the printhead is clean, you need to dry the unit thoroughly. Shake as much water from it as you can then pat it gently dry. Next place it on some absorbant kitchen paper and put the unit in a warm place to thoroughly dry (Overnight in a warm airing cupboard would be good). Once dry, refit the unit put in (Preferably new - but I've used existing one's without problem) cartridges and run a cleaning cycle. Your printer should now work as if new!!! - In Most cases!! - sometimes though, you'll either have to replace the print head unit - which sometimes can be more expensive that simply replacing the printer. What have you got to lose though eh? CLIVUSS

Mar 26, 2008 | Canon PIXMA MP780 All-In-One InkJet...

2 Answers

Getting printer to work


## 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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