(Topic ID: 234309)

Can you diagnose / locate a G.I. short with a multimeter?


By beefzap

6 months ago



Topic Stats

  • 32 posts
  • 14 Pinsiders participating
  • Latest reply 6 months ago by tktlwyr
  • Topic is favorited by 10 Pinsiders

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    #1 6 months ago

    Is this possible? I am blowing F109 on my Shadow. No obvious issues with any of the bulb sockets.

    If not the next step would be to first replace all the bulbs, then start replacing the sockets I think.

    Would be nice to ID the bulb/socket that is most likely the culprit.

    #21 6 months ago
    Quoted from jawjaw:

    Sure does. It wouldn't be so bad if I hadn't just finished doing a ton of work over the last few months. Sick of working on it and just want to play it for a while.

    I bought the one RatShack posted in 5A configuration. Less than $6.
    amazon.com link ยป
    Here is what I did in action. I later wrapped the terminals in electrical tape. Friend suggested that and good idea.
    @beefzap - You figure out the short in your Shadow?[quoted image]

    Nope not yet, will try to work on the issue tomorrow, once solved I will post the gory details

    #24 6 months ago

    With J121 out the fuse does not blow. Checked a few sockets and a couple looked like they had some solder so removed it. Now the fuse does not blow but no GI lights at the back left playfield still. Damn....

    2 weeks later
    #28 6 months ago

    Just now getting back to this. Replaced 2 sockets that had solder all over the place. Turned the machine on and the GI was on for about 5 seconds. Then poof. Fuse is blown as well.

    No chaffed wires.

    I will try replacing all the bulbs next and see what happens.

    #29 6 months ago

    Well....they are on. I am leaving the machine on for a long time so I can just look at them.

    So it was either solved by replacing all the bulbs or I did find a wire (not chaffed) that was pinched in between on of the socket connectors. Pulled it out.

    I am not declaring victory yet.

    But thanks for all the help on this.

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