The NEW Build Your Own Arcade Controls
Main => Monitor/Video Forum => Topic started by: ArcadeNerd on May 02, 2021, 11:52:16 pm
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Hello, I am building a basic test rig to check some monitors. I have a TPG for the video so I followed the AC wiring plan on http://arcadecontrols.com/BBBB/acwiring.html to set up
for power. My question is, what to do about monitors than have a ground? Only the 2 polarities come off the isolation transformer.
I'm new to monitor repair so please bear with me. I tried to find the answer to this without any luck so I figured I'd come back to the place where I started reading about arcades, MAME, and cab building...BYOAC.
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Welcome back, ArcadeNerd. :cheers:
My question is, what to do about monitors than have a ground? Only the 2 polarities come off the isolation transformer.
The main purpose of the isolation transformer (https://en.wikipedia.org/wiki/Isolation_transformer) is isolating ground on the monitor from ground on the rest of the cab.
I'm sure you already know this, but DO NOT connect the ground on a monitor that needs an isolation transformer to ground on the rest of the cab . . . unless you want to blow up that monitor. >:D
Monitors that have a 3-prong (hot/neutral/ground) power cable don't need an isolation transformer.
first thing you need to do is correctly identify your monitor make/model because some monitors require certain input voltages to work
for instance if you connect a nanao ms8 direct to the mains it will blow up as it needs an isolation transformer to run correctly
if you connect a hantarex polo1 to direct mains it will run perfectly
Scott
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Could you add a secondary outlet that taps off before the isolation transformer, and include a ground? I mean, like if you were to buy a panel mount outlet, like this (https://www.amazon.com/Leviton-1374-1-Receptacle-Straight-Grounding/dp/B0036ZA94S) and just run the wires to the power and ground before the isolation transformer, then when using a monitor that requires ground, you can plug it into the receptacle, as monitors that require an isolation transformer should never have a normal outlet harness, buy you could just put a note on the panel that its not an isolated receptacle.
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Thanks for the info so far.
Would it hurt the monitor that doesn't "need" an isolation transformer to just hook up the 2 polarities from the isolation transformer and not have a ground going to it or would I likely shock myself or blow something up? This would just be to test the monitor (hook up the TPG to check stuff out) not in a cab long term.
Thanks!
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I built this a while back -
http://forum.arcadecontrols.com/index.php/topic,161716.msg1704115.html#msg1704115
I use it all the time.. Maybe it will help you.