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

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How to clean the inside of the glass on a Canon MP780?

I cannot open the printer in order to clean the bottom of the glass which has a whitish flim on it. How do you get to the gack side of the glass?

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  • 2 more comments 
  • Anonymous Mar 27, 2009

    Glass is dirty on scanner of MP780 so it leaves lines in photos.

  • Anonymous Mar 29, 2009

    The underside of the platen glass on my MP780 has become cloudy. It prints fine (i.e., from the computer), but copies, scans, etc. look terrible.

  • MCL3131 Mar 31, 2009

    How do I get at the underside of the glass to clean it ???



    Can anyone help.



  • Anonymous May 20, 2009

    How to remove the glass for cleaning.

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3 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

  • 2427 Answers

SOURCE: How do you clean the INSIDE of the scanner GLASS???

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

that is the service manual for the printer you just need to follow the instructions

you can alos find another service manual for your printer here

http://www.nodevice.com/manual/Canon/page15.html

just scroll down till you see it

Posted on Dec 31, 2007

rldes
  • 1 Answer

SOURCE: the glass became dirty in

Of course don't do this if you can avoid it, but I found it somewhat simple (on my 3rd or 4th try). For some reason my scanner came from the factory with a dirty inside glass, and even though it didn't seem to affect the scanning, it bugged me enough to want to clean it. So here's what I did ...

1) lock the lamp (switch on the bottom)

2) open the lid and remove the 2 screws - one left, one right.
(The one in the middle can stay in.)

3) Here's the tricky part - the lid and glass and framing around the glass can slide out toward the back (or top ... toward the screws). Only go out an inch or two.

4) Lift the lid from the front - glass and all and try not to separate the lid from the flat wire attachment. This is designed to come out, so it's okay if it does - it's just hard to get back in!

5) clean the glass. It is glass, so I used isopropol alcohol. Clean with a lent free cloth and make sure all the streaks are gone.

6-9) reverse steps 4 through 1 to reassemble.

10) clean the top surface same as step 5 (prior to plugging it back in of course).

I was afraid I may have been too ******* it when I had to re-insert the wire (mine came out during step 4), but it seems to be working. Hope so because this is a great little scanner. ;)

Hope this helps.

Posted on Oct 26, 2011

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1 Answer

Canon Pixma MP780. Recently my color ink


Have you checked to see if the jet area on the bottom of the ink cartridge has a blackish sludge on them? It might be that the area that the print cartridges are purged/cleaned to one side of the printer (sometimes called a service station, or spitoon) has built up excess ink that has gotten thick and high enough that as the carriage goes over that area the bottom of the cartridge gets polluted with the blackish sludge. It will work slightly into the jets where the ink comes out and cause discoloration, even after you change the color cartridge. Open the unit to look inside with a flashlight for build ups and clean it (if you find some) with disposable things like cotton swabs, coffee stirrers, whatever you have that wont damage anything inside. Another cause could be mixing of the cyan and magenta and yellow somehow inside making a dark color representing black - but replacing the cartridge would cure it immediately.

Jun 19, 2010 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

How to clean underside of scanner glass


you have to open up the printer

but due to printers being a cheap thing and everybody has a different one you most likely wont find anywhere on how to open up the printer

if you open it up yourself you need to take your time due to the printer having many gears and belts and moving parts


Dec 30, 2009 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

When i scan on my Canon Pixma MP780 printer i get a red line down


This is what the service manual says:
(1) Clean the Document glass.
(2) Check the connection
between the contact sensor
and SPCNT board (JCCD1).
(3) Replace the SCANNER
unit.
(4) Replace the SPCNT board
***’y.

Jun 11, 2009 | Canon PIXMA MP780 All-In-One InkJet...

2 Answers

Dark copies.


If it's underneath the glass, you need to remove the top and clean it. The oher issue here is Why is it getting foggY??? THAT should be a concern to you.
Either let it dry naturally, or remove the top to clean.

Oct 23, 2008 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

Blurry Scanning/Copying


Are you scanning both black and white and color the same way? The ADF (automatic document feeder) uses a different scanning area than when you place the document on the scanning glass. If you open the scanner cover, look to the left of the main scanner glass to the narrow strip used for the ADF. Make sure this narrow strip is clean -- no ink or white-out or scratches. This can make your copies look dirty or smudged.

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

2 Answers

How do you clean the INSIDE of the scanner GLASS???


The service manual is avalable free through Emule:

ed2k://|file|Canon%20PIXMA%20MP750%20MP780%20service%20manual.pdf|1416152|F054D74C11BE5EEAF2F6D203362303DE|/

Dec 19, 2007 | Canon PIXMA MP780 All-In-One InkJet...

3 Answers

On my Canon Pixma MP780 a vertical line appears on copies made using ADF


I tried the other solutions listed here - and no luck. After cleaning the inside of the ADF, like the manual suggested - no change. How are you supposed to do that anyway? Deep cleaning the inside of the machine also has nothing to do with it.

I finally figured out why things that I copied with the ADF had lines/marks on them, but those placed directly on the platen (big glass) were fine. When you copy with the ADF, the copy is not being made from the large glass area. Rather, there is a thin glass area right next to it.

Turns out, there were a couple of smudges (goo) on that thin piece of glass which were creating long vertical lines down every sheet. Cleaned the glass - problem solved!

Gosh, I hope this helps someone else save some time, and frustration.

Nov 27, 2007 | Canon PIXMA MP780 All-In-One InkJet...

2 Answers

Black Line printing on copies


Just clean the glass top of the scanner and the slit of glass on the left hand side of the scanner.

Dec 04, 2006 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

Verical line(s) problem with canon mp780


Hi Nick, It's ONLY when you copy? I start by cleaning the platen glass. Wipe the Platen Glass with a clean, soft, lint-free cloth moistened with water. Then wipe with a clean, soft, dry, lint-free cloth making sure not to leave any residue, especially on the Platen Glass. If you have trouble getting the scanning area clean, wipe with diluted mild detergent (for dish washing). Do the same thing for the white area under the platen lid. If this does not resolve the problem let me know. His Dudeness

Nov 15, 2006 | Canon PIXMA MP780 All-In-One InkJet...

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