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(Topic ID: 168313)

Dmd has 2 dotted lines

By shaub

7 years ago



Topic Stats

  • 8 posts
  • 3 Pinsiders participating
  • Latest reply 7 years ago by shaub
  • Topic is favorited by 2 Pinsiders

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    #1 7 years ago
    OP
     
    SAA

    shaub

    Pinside member

    9y 66,050 1,815 21

    I just picked up a machine and the dmd has what looks like two dotted vertical lines. What is the likely cause of this?

    20160907_220714 (resized).jpg20160907_220714 (resized).jpg

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    #2 7 years ago
     
    ???

    Don44

    Pinside+ Frequent

    US Newton, NJ

    11y 70,800 1,741 5 1

    You may have done this already but I would try reseating all the ribbon cables and any wires associated with the display

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    #3 7 years ago
    OP
     
    SAA

    shaub

    Pinside member

    9y 66,050 1,815 21

    Yeah I did that, but I'm gonna replace the ribbon cables with a known working cable after work today and see if that helps.

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    #4 7 years ago
    OP
     
    SAA

    shaub

    Pinside member

    9y 66,050 1,815 21

    Ok, I've figured out that the problem is with the power supply board, not the dmd itself or the ribbon cables. Any thoughts on where to go next?

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    #5 7 years ago
     
    BTF

    PinballManiac40

    Pinside+ Frequent

    14y 234K 17,632 104

    If you mean he DMD controller board, then the RAM 6264 IC would be the next posibility.

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    #6 7 years ago
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    shaub

    Pinside member

    9y 66,050 1,815 21

    Yes, that is what I mean. Thanks for info, I'll definitely look at replacing the ic and hope that does it.

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    #7 7 years ago
     
    BTF

    PinballManiac40

    Pinside+ Frequent

    14y 234K 17,632 104

    It did fix it on one I repaired a month ago. I soldered a socket on the board so I can easily change it in the future or use the board to test other 6264 parts.

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    #8 7 years ago
    OP
     
    SAA

    shaub

    Pinside member

    9y 66,050 1,815 21

    Thanks Maniac, I replaced the ram chip and the dmd is working fine.

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