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(Topic ID: 197707)

Tech: Rottendog DMD Controller issue

By Pintopia

6 years ago


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    #1 6 years ago
    OP
     
    DLW

    Pintopia

    Pinside+ Frequent

    US Duanesburg, NY

    11y 79,050 780 19 10

    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

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    #2 6 years ago
     
    ABC

    Crash

    Pinside member

    13y 141K 14,139

    Can you get a photo of this compared to the "all dots on" display test using a normal Williams controller?

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    #3 6 years ago
     
    JPM

    jmountjoy111

    Pinside member

    US Williamsburg, KY

    10y 109K 3,431 84

    OP
    Quoted from Pintopia:

    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

    Did you buy the board new? I just call jim at rottendog whenever I have had an issue with a board. He will typically warranty about anything. I've just sent them back and he fixed it and sent it back to me

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    #4 6 years ago
    OP
     
    DLW

    Pintopia

    Pinside+ Frequent

    US Duanesburg, NY

    11y 79,050 780 19 10

    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....

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    #5 6 years ago
    OP
     
    DLW

    Pintopia

    Pinside+ Frequent

    US Duanesburg, NY

    11y 79,050 780 19 10

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

    IMG_2815 (resized).JPGIMG_2815 (resized).JPG

    IMG_2818 (resized).JPGIMG_2818 (resized).JPG

    IMG_2816 (resized).JPGIMG_2816 (resized).JPG

    IMG_2814 (resized).JPGIMG_2814 (resized).JPG

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    #6 6 years ago
    OP
     
    DLW

    Pintopia

    Pinside+ Frequent

    US Duanesburg, NY

    11y 79,050 780 19 10

    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

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    #7 6 years ago
     
    ABC

    Crash

    Pinside member

    13y 141K 14,139

    You said all voltages checked out, otherwise I would have mentioned potential issues with voltages. Obviously your high voltages are way out of spec and can possibly damage/destroy your DMD. This is not the first time Rottendog display driver boards have exhibited this issue. It was also somewhat common for a while on Data East games.

    Jim should be able to help you. It's a design flaw or incorrect components. He will usually swap out the bad components with the correct ones and return the board for you.

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    #8 6 years ago
    OP
     
    DLW

    Pintopia

    Pinside+ Frequent

    US Duanesburg, NY

    11y 79,050 780 19 10

    Ok thanks I'll contact him tomorrw.

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    #9 6 years ago
    OP
     
    DLW

    Pintopia

    Pinside+ Frequent

    US Duanesburg, NY

    11y 79,050 780 19 10

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

    2 weeks later
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    #10 6 years ago
    OP
     
    DLW

    Pintopia

    Pinside+ Frequent

    US Duanesburg, NY

    11y 79,050 780 19 10

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

    9 months later
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    #11 5 years ago
     
    FK

    Frantickoala

    Pinside member

    7y 22,300 16

    Hmm so I have the same issue. I can not get a hold of anyone at rotten dog . I have already replaced the 2 voltage regulators with no change. currently I have an original williams dmd controller in the game and it works fine.

    Any advice would be helpful

    NVM i'm an idiot

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