yet another iso question

coinopjunkie

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I'm converting a computer based solitaire poker machine into a 60n1 I used the original computer power supply with the original monitor that was plugged into the computer power supply. Well of course after I finish everything the power supply dies so I'm just going to put in a regular arcade power supply (peter Chou) can I feel reasonably safe this thing does not need a iso transformer? Meaning the computer power supply is not an iso transformer is it?
 
Isolation transformers are for monitors, not power supplies. In fact, the only thing running off an isolation transformer should be the monitor. Though I have seen cabinets wired with everything coming off the iso, it should be rewired correctly.
 
thanks

Isolation transformers are for monitors, not power supplies. In fact, the only thing running off an isolation transformer should be the monitor. Though I have seen cabinets wired with everything coming off the iso, it should be rewired correctly.

I think you miss understood my question, does a computer power supply provide iso power. Now that I'm not using a computer power supply do I need to add an Iso transformer I suspect not but want to make sure before I ruin my monitor.
 
Computer power supply = switching power supply

Peter Chou power supply = switching power supply

neither has a built in isolation transformer

The device in the middle of this picture to the left of the power supply is the isolation transformer. Not to be confused with the EMI filter below it.

Hope this helps.

electrical_wiring1.JPG
 
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A computer power supply......or any other power supply in a video game DOES NOT power the monitor.

Your monitor (generally) runs on 120 volts AC.

Your power supply (generally) outputs 5 volts DC, 12 volts DC, and negative 5 volts DC.

Edward
 
my monitor

A computer power supply......or any other power supply in a video game DOES NOT power the monitor.

Your monitor (generally) runs on 120 volts AC.

Your power supply (generally) outputs 5 volts DC, 12 volts DC, and negative 5 volts DC.

Edward

My monitor did plug into the computer power supply, I was fairly certain this didn't provide any iso protection but since I was not going to work on it until late tonight I decided to ask just to make sure.
 
Thanks

Computer power supply = switching power supply

Peter Chou power supply = switching power supply

neither has a built in isolation transformer

The device in the middle of this picture to the left of the power supply is the isolation transformer. Not to be confused with the EMI filter below it.

Hope this helps.

electrical_wiring1.JPG

Thanks, yes I have a ton of iso transformers hanging around but I don't use computer style power supply's too often and was not sure if they provided the required iso protection I know the at style power supply was designed to have the monitor plug into them.
 
Assuming it's a standard AT or ATX power supply (who knows why you didn't supply this information), why on earth would it provide isolation? No one has ever made a computer monitor which requires an isolation transformer.
 
I think the confusion here is that the OP remembers a power supply used in a newer cabinet that used a monitor with on-board isolation, like a Wells Gardner 25k7400 or U2000. Those monitors got their power directly from the line cord. The power supply offered either a connector or pigtail that supplied a 120v bypass connection to feed the monitor's chassis.

No isolation transformer is required for these monitors, since they already have one built in to the chassis.

My Sammy shooter cab is set up like this. Monitor plugs right into the side of the power supply. If you open the power supply up and follow the wires, you'll see the plug on the side of the power supply (for the monitor) is tapped directly into the ac line cord.
 
stay out of my post

Assuming it's a standard AT or ATX power supply (who knows why you didn't supply this information), why on earth would it provide isolation? No one has ever made a computer monitor which requires an isolation transformer.

You never have anything worth while to say and always criticize anything I post, why does it matter if it was at or atx? the question was if they provided iso protection or not if neither does why do you wonder why I didn't offer this information? Because it's irrelevant You just like to talk no matter what. This is not the first time we have had this conversation. People here ask questions because they don't know or are not sure why do you try to make them feel stupid for asking questions? I know the answer but if I say it I will get an infraction.
 
Thank you

I think the confusion here is that the OP remembers a power supply used in a newer cabinet that used a monitor with on-board isolation, like a Wells Gardner 25k7400 or U2000. Those monitors got their power directly from the line cord. The power supply offered either a connector or pigtail that supplied a 120v bypass connection to feed the monitor's chassis.

No isolation transformer is required for these monitors, since they already have one built in to the chassis.

My Sammy shooter cab is set up like this. Monitor plugs right into the side of the power supply. If you open the power supply up and follow the wires, you'll see the plug on the side of the power supply (for the monitor) is tapped directly into the ac line cord.

Yes before I through it in the trash I did take it apart and it appeared like you said that it was tapped directly to the ac line, I figured this was the case because the monitor still came on even with the power supply dead. But I thought it was better to ask then blow up a nice monitor. But nothing here is ever a simple answer for some reason. Not referring to your post. My monitor must have built in iso protection which I was 99% sure it did. No idea what the monitor is if it is a computer monitor or arcade monitor.
 
You never have anything worth while to say and always criticize anything I post, why does it matter if it was at or atx? the question was if they provided iso protection or not if neither does why do you wonder why I didn't offer this information? Because it's irrelevant You just like to talk no matter what. This is not the first time we have had this conversation. People here ask questions because they don't know or are not sure why do you try to make them feel stupid for asking questions? I know the answer but if I say it I will get an infraction.
Letting-a-baby-cry.jpg
 
Because we need to know exactly what we are talking about here. There are many power supplies which look like computer power supplies but are actually designed for arcade use.

It is quite possible some of these do actually provide an isolated power output for a monitor.
 
coinop junkie, if you look at a monitor near where the power plugs in to it, if it doesn't need an isolation transformer it'll have what looks like an isolation transformer mounted on the actual monitor board. you'll see a big transformer somewhere. If you don't see the big transformer on the board, then you need one for it.

As for your original question, on a power supply when it has a/c voltage coming out of it it's just a straight pass-through, there's no isolation transformer built into the power supply.
 
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