(Topic ID: 197707)

Tech: Rottendog DMD Controller issue


By Pintopia

2 years ago



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  • 11 posts
  • 4 Pinsiders participating
  • Latest reply 1 year ago by Frantickoala
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    #1 2 years ago

    I have a Rottendog DMD controller DMD089 that is causing all dots to illuminate on the display. I swapped in a WPC controller and the display worked fine. All voltages checked out. Any ideas of what might be causing this behaviour? Also can I use the WPC scamatic for this or are there differeces?

    Thanks Don

    #4 2 years ago

    The board came in a game I purchased so not sure of its age however it does look new

    The williams controller functions normally its only the Rottendog that exhibits the behaviour I'll take some photos....

    #5 2 years ago

    First image is with a good wpc controller other photos of the problem board and what it displays all dots on

    IMG_2815 (resized).JPG

    IMG_2818 (resized).JPG

    IMG_2816 (resized).JPG

    IMG_2814 (resized).JPG

    #6 2 years ago

    Ok images didn't post in the right order but I think you'll understand...

    Ideas

    Also voltages measured as follows:

    68 vdc = 66
    -105 vdc = -138
    -115 vdc = -153
    -125 vdc = -155
    5 vdc = 5
    12 vdc =12

    #8 2 years ago

    Ok thanks I'll contact him tomorrw.

    #9 2 years ago

    Not sure why I said the voltages checked out crazy day....

    2 weeks later
    #10 2 years ago

    Update: problem solved contacted Rottendog had me replace the two LM337 voltage regulators works perfect now.

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