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Pixma MG3650 vertical stretched image / white stripes

Discussion in 'Canon InkJet Printers' started by iptodorov, Aug 10, 2019.

  1. Aug 10, 2019
    iptodorov

    iptodorov Newbie to Printing

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    Hello there,
    For few days now I have a problem with my canon pixma mg3650. It stretches the printed/copied images vertically. There is no lost information though. It is just like the image is cut and the different parts are put away circa 0.5cm from each other...and white stripe form in between (see images below).
    I read a lot and made whole bunch of things - replacing the cartridges, cleaning the timing stripe, cleaning heads etc.but nothing works.
    I have the feeling the rollers are pulling the paper quite fast and this causes the problem. Oh, and also when i try to print a double sided page it prints only the 2nd page and spits out the paper completely out. Then when it takes another page and printa out the 1st page. Both are vertically stretched as i explained.

    Is there any solution for a vertical alignment or time sync???

    Thanks in advance!
     

    Attached Files:

  2. Aug 11, 2019
    iptodorov

    iptodorov Newbie to Printing

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    P.S.
    Made another picture with full colour photo. Makes it easier to see the issue than the B&W text pic in my previous post.

    Also it seems it cannot print a correct head alignment pattern so as to perform the function properly (i get an error every time).
     

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    Last edited: Aug 11, 2019
  3. Aug 11, 2019
    PeterBJ

    PeterBJ Printer VIP Platinum Printer Member

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    Yes the colour picture is much better. It clearly shows alternating stripes of different width and with a constant distance likely equalling pi x diameter of paper transport roller.

    I think the problem is caused by one or maybe two dirty timing (encoder) disks. These disks have fine markings near the circumference. The markings are read by optical sensors to determine the angular position of the paper transport roller(s). Ink or other dirt on the disk(s) will cause the optical reader to miss some markings and cause too much turning causing some unprinted lines. Here is a post showing a printer with two timing disks.

    A service manual for your printer is nowhere to be found but the printer looks somewhat similar to the MG5200 series printers so maybe a MG5200 service manual will be helpful for removing the casing to get access to the timing disks? You find an MG5200 service manual here. See page 20/62 and on for disassembly instructions.

    After you have removed the upper part of the casing you can clean the disks with a window cleaner with ammonia on a soft tissue paper. Be careful not to bend or damage the disk(s), you can turn the rollers by turning one of the white nylon gears, do not use the disks for turning.

    I hope this helps.
     
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  4. Aug 11, 2019
    The Hat

    The Hat Printer VIP Moderator

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    It was interesting to see all the different things you tried to fix your problem but didn’t quite make it, and you might have solved the issue yourself if you had kept going a bit further.
    I reckon you may have a problem with paper advancement wheel, it’s located on the right side of the carriageway, try carefully cleaning it on the inside or both sides if you can get to it easily, a paper towel soaked in W5 (window cleaner) will remove any build-up of ink and grit…

    [​IMG] this is the disc your looking for..
     
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  5. Aug 11, 2019
    iptodorov

    iptodorov Newbie to Printing

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    Guys,
    It worked!!! Timing disc was quite dirty. Thanks for the great help and advice. You are printer savers as I was about to throw it in the trash!

    I still get white stripes on the colours (mixed colours) but not due to the timing disc or stripe. Looking at the pattern seems to me a problem in the colour head/cartridge, although i tried to clean it deep. Anyway i will tweak around a little bit and should be fixed.
    Edit: this one also solved after manually cleaning heads and reinsert.

    To all other guys trying to reach the timing disc on the MG3650 it is located under the cotrol pannel on the leftside. Attaching some dismantling pics:
    1. Remove 2 screws on the backside (above power plug)
    2. Remove the top plastic frame around the buttons
    3. (I struggled a lot here) Push the plastic claw with a screwdriver to release the side panel
    4. Pick the plastic panel on the bottom side (2 spots indicated)

    The side panel should get out now and timing disc is easily accessible for cleaning!

    Regards

    Edit:
     

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    Last edited: Aug 11, 2019
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  6. Aug 12, 2019
    PeterBJ

    PeterBJ Printer VIP Platinum Printer Member

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    Thank you for the feed-back and disassembly instructions, and congratulations with cleaning the timing disk and colour cartridge print head. Well done :thumbsup
     
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