Build Your Own Arcade Controls Forum
Main => Monitor/Video Forum => Topic started by: Goatslayer on April 02, 2013, 10:09:25 am
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I have had a Vs. Unisystem for a couple years now. I had pulled the monitor about a year ago to re-cap it, but never got around to it. Well about a month ago I picked up a Vs. PCB with SMB installed. So for a couple of weeks I used a buddies 20EZ out of his Dualsystem. Everything was fine. I re-capped my monitor this weekend. Then I tested it outside the cab. Everything looked great! But once I fired it up with the monitor in the cab, all there was, was the smell of fried IC's. It looks like it cooked the two LM3900N Quad-Processors at the top of the board (see attached picture). Before I repair the board, I want to know why that would happen? I've never heard of a monitor cooking IC's on a game PCB. Also, can someone from the KLOV forum give me a recommendation over there? Lurking on their forums, I see they have a lot of techs who don't frequent here that I'd like to ping this off of. Thanks!
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When you "tested the monitor outside the cabinet", where did you plug the monitor power cord into?
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you may have reversed the plugs on the audio board in the monitor
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When you "tested the monitor outside the cabinet", where did you plug the monitor power cord into?
I used the 100v plug built into the bottom of the cab. I did not hook up the audio as I'm missing the brown and black cable for some reason.
I've ordered a hand full of those chips and some sockets just in case it happens again.
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the only way that happens is if you reverse the JB and JC connectors up on the audio amp.
it will fry the audio section on the PCB everytime.
Peace
Buffett