Question about Canon PIXMA MX850 multifunction InkJet Printer

1 Answer

Canon MX850 dust under ADF glass

To the two previous posters. I have exact same issue. Flat scans are beautiful, but scans via the ADF have started getting lines. Obviously, this is a dust particle. But its not on the top side of the smaller ADF glass. Its underneath. You can prove this by taking a flashlight and shining at various angles while getting closer to this ADF glass. Mine has a fine light coating of tiny dust with two or three larger particles. And it is these larger particles which appear to be causing the lines in the scans. Worse, I can see more fine dust (presumably paper dust) on the black plastic under the glass where the wheels and belts are.
I have yet to figure out how how to get INSIDE this part so I can get underneath to clean the glass. IMHO, I think Canon designed this as a sealed unit, to avoid dust, but on my unit, only the two ends of the ADF glass are glued down. Along the longest edge, there is no sealant. So that appears to be the point of entry for the finer dust.

Posted by on

  • d_mcnish Jun 29, 2009

    Yes, its still under warranty. What a pain!
    I have temporarily resolved it by slipping a curled piece of paper in the gap along the long side of the ADF glass where it is not sealed. it curls upward and basically I am able to pull it back and forth such that the edge rubs on the underside of the glass and "sweeps" the dust off the glass. This has taken care of the "lines" issue when scanning via ADF. (for now)
    Except for this one tiny flaw (not sealing that long edge, which lets dust in). This is an unbelievable scanner. I have put thousands of pages through the ADF. I don't know if the printer is any good as I've only printed two pages since I got it in December.
    I guess I'll start on the warranty return process.
    Thanks

×

Ad

1 Answer

  • 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.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 2,306 Answers

This is a newer unit, and Canon has a one year warranty, any chance this is under warranty? Canon did design this as a sealed unit, no parts available except the entire assembly, and no dis-assembly instructions.

Posted on Jun 29, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya Technician can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Technician (only for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Officejet 9600: vertical lines (4) in center of page when copying using ADF. No lines when copying from glass. I tried the cleaning procedures on your trouble shooting pages. They did not help. How ca


John:
When using the ADF, the scanner doesn't move. The long rectangular platen glass on the left side of the machine is used, not the large glass. I believe that if you clean the long, thin piece of glass on the left side of the platen, your lines will disappear.

May 21, 2014 | HP Officejet Pro 8600 e-All-in-One -...

1 Answer

My feeder to scan puts a line down the entire document - the line doesn't appear when I scan from the deck of the printer. I've attempted to clean the rollers but the line still appears on my document?


You don't say what kind of printer you have.
So, I will generalize my answer.
The reason for the line using the ADF and no line with the flatbed is that the paper is moving when using the ADF. So, a piece of dirt, dust or whatever on the ADF glass will cause a line because the paper is moving over a mark on the glass. The copy made on the flat bed glass doesn't move, so no line.
Anyways, clean the thin piece of glass that should be to the left of the big flat bed glass. That will fix your problem

Jan 20, 2011 | HP Office Equipment & Supplies

1 Answer

My printer is fine when i am printing from my computer, but when i make a copy, there is a line down the page


Be sure the glass is clean.
If the Canon is anything like HP and you are using the ADF there is a thin strip of glass on the left end of the flatbed. This is where scans are read when using the ADF (Automatic Document Feeder)
All it takes is a tiny speck on the glass to cause lines on the copy. Clean it by spraying a glass cleaner on a soft towel and wiping

Jan 03, 2011 | Canon PIXMA MX850 Multifunction Printer

1 Answer

While printing, red turned to pink on printed sheets. All cartridges have ink.


Try
Clean the Scanning Area sikaku.gif Cleaning the Platen Glass and Document Cover i_expl.gif Caution
Be sure to turn off the power and disconnect the power cord before cleaning the machine.

i_important.gif Important

bullet_s2.gif The inner side of the Document Cover (white sheet) (C) is easily damaged, so wipe it gently.

bullet_s2.gif If the glass of the ADF (A) is stained with ink, correction fluid, or the like, black streaks may appear on the printed paper when the document is loaded in the ADF. With a clean, soft, lint-free cloth, wipe the glass of the ADF.

With a clean, soft, lint-free cloth, wipe the Platen Glass (D), the inner side of the Document Cover (white sheet) (C), the glass of the ADF (A), and the inner side of the ADF (white area) (B) gently. Make sure not to leave any residue, especially on the Platen Glass.

t_50710ce_mx85095.jpg
sikaku.gif Cleaning the ADF i_expl.gif Caution
Be sure to turn off the power and disconnect the power cord before cleaning the machine.

1. Open the Document Tray.

t_50720ce_mx85096.jpg
2. Open the Feeder Cover.

t_50730ce_mx85097.jpg
3. With a soft, clean, lint-free and dry cloth, wipe off any paper dust from the inside of the Feeder Cover (A).

t_50740ce_mx85098.jpg
4. After wiping, close the Feeder Cover by pushing it until it clicks into place.

5. Close the Document Tray.

6. Reconnect the power cord then turn on the machine.

Oct 27, 2010 | Canon PIXMA MX850 Multifunction Printer

2 Answers

Bottom half portion of the paper horizontally gets black (dark)


I would presume that somwheare beneath adf is light coming to scanner. Try to adjust height and possition of adf on adf hinges.You have two screws, one for height, and other for left or right possition.

May 25, 2010 | Canon imageRUNNER 5000 Copier

5 Answers

Vertical line appears in scans using the ADF, but not with copies


happened to me after i fed a page with not-too-hard whiteout on it. the feeder makes the page run through a different piece of glass and i just had to clean it.

Aug 18, 2009 | Brother MFC 7840W Printer

1 Answer

Very crisp vertical grey line appears (glass clean)


I have the exact same problem. It was there since I first bought the MFC-7840W.
Vertical line appears in scans using the automatic document feeder (ADF).
Vertical line does not appear when scanning single page (placing it directly on the glass -- i.e. not using the ADF).

Cleaning the glass strip for the ADF (or the white pressure bar overhead) does not solve the problem.
The problem does not occur with copies using the ADF (using the COPY button which is basically a scan and print). This would suggest that dust and dirt is not to blame because that would also appear on the copies.
But since I believe a copy is basically a scan plus print, they should be using the same electronics -- a hardware problem on the scan would likely appear on a copy also -- there is some difference between how they accomplish this.
It's definitely not a software issue since it occurs on all versions of Windows and Mac OS X (and multiple computers). It also does not matter whether I "push" the scan to the computer by using the scan button on the MFC... or "pull" the scan from the MFC using the Brother Control Center software.

Aug 12, 2009 | Office Equipment & Supplies

1 Answer

We cannot use the ADF on our Canon mx850. From


No. It's not probably not you.
If you have placed the paper between the guides, and snugged them up, it should go (relatively) straight -simple as that.
If not, then likely something is missing, bent, or broken. Return it for a new replacement - that's what warranties are for.

Jun 20, 2009 | Canon PIXMA MX850 multifunction InkJet...

1 Answer

Canon MX850 printer - ADF copy has black line on it


Hello, my name is Steve,.
This is a common problem and an easy fix.
If you lift the ADF / top cover assembly up, you will see a small narrow piece of glass next to the flat-bed glass.

Ths is called a "Slit-glass". The only purpose is to read content from that point by the scanner, The Scanner will sit in the underside of it.

It is dirty. Wipe this with glass cleaner and a soft lint-free cloth. you may need to do this several times. Concentrate the part of the glass were this image problem is just by the orientation of the document you are installing with the direction of the document you are passing through the ADF.

It will take several attempts, but with each try, make a new test from the original document, unyil the problem disappears.

I believe this will solve your problem, Best , Steve

Mar 10, 2009 | Canon PIXMA MX850 multifunction InkJet...

3 Answers

Scanner Imaging problem


Your scanner’s lock switch may be locking up the carriage unit. Depending on the model you own, your scanner’s lock switch resides in one of two locations. You can find it beneath the scanner itself or in a corner next to the scanner bed after you lift the lid. The switch should be marked with a locked and unlocked padlock symbol; slide the switch to the unlocked padlock to unlock the carriage unit.
It’s also possible that the supplied USB cable is improperly connected to your computer. Connect the cable directly to your PC. Canon’s online documentation indicates that scanners that connect via a USB hub may not work properly. Once you have unlocked your scanner and properly connected it directly to your computer, try to rescan the image.

Mar 01, 2008 | Xerox WorkCentre PE120 All-In-One Laser...

Not finding what you are looking for?
Canon PIXMA MX850 multifunction InkJet Printer Logo

366 people viewed this question

Ask a Question

Usually answered in minutes!

Top Canon Office Equipment & Supplies Experts

kakima

Level 3 Expert

102366 Answers

old marine
old marine

Level 3 Expert

2039 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Are you a Canon Office Equipment and Supply Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...