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Posts: 1
Registered: ‎04-09-2016

My MG6620 printer has suddenly started printing lines jaggedly.

Product Expert
Posts: 2,248
Registered: ‎07-28-2014

Re: My MG6620 printer has suddenly started printing lines jaggedly.

Hi cajun520,


When your PIXMA MG6620 prints lines incorrectly, the encoder may have become dirty.  Cleaning the encoder strip should resolve this issue. Please follow the procedures below to check the film condition, and clean it when necessary:


 1.  Press the power button to turn your PIXMA MG6620 off.


 2.  Unplug the power cord from the printer.  Be sure to turn off the printer power and unplug the power cord first.


 3.  Open the Paper Output Cover.


 4.  Check if the Encoder Film inside the printer is clear.  The Encoder Film is the transparent thin film.  Please view the image at the bottom of this post for further detail.


 5.  If the Encoder Film is smeared as shown in the image, it needs to be cleaned.


 6.  Place a few drops of neutral detergent (2 to 3 drops of neutral detergent in 1/4 cup of tap water) on a cotton swab with water. CAUTION: Do not use any other detergents.


 7.  Moisten a cotton swab with the prepared cleaning water. Eliminate extra water so that no water drops.


 8.  Using the moistened cotton swab, wipe the Encoder Film.  CAUTION: Be cautious so that no water drops inside the printer.


CAUTION:  Do not contact the rail. If the rail is contacted, the print quality may be deteriorated. The Encoder Film is fixed to the printer with the springs at the ends. If the film is pushed too strong, it may be dislocated. Do not push the film. Just gently move the cotton swab over the surface of the film.


Also, please keep your hands off the printer and clean the film with the tip of the cotton swab.  Change the cotton swab to new ones frequently.


 9.  Eliminate any stains or smearing from the film until the entire film becomes transparent and clear.


10.  If the trail of detergent is left on the film, clean it using a cotton swab that is moistened with just water.  If moisture is left on the film, eliminate it using a dry cotton swab, and wait until the film dries well.


11.  Close the Paper Output Cover, and plug in the power cord of the printer.


12.  Press the power button to turn your PIXMA MG6620 on.


13.  Please print a test page.


14.  If the problem persists, check and clean the Encoder Film again.


If you continue to have difficulties, please contact our support group using the following link:


Encoder strip.jpg


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