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Omega Race Power Supply Questions
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SirPeale:
There's nothing wrong with using  a *damp* cloth to wipe down electronics.  As Kevin said, the key is in the drying.

With a transformer block like that you're not even talking about high voltage.  And after drying anything that's going to happen will happen right when you plug it in, inside the cabinet.

Have you seen my A/R II cleanup?   I sure as heck didn't do that with just a brush.

CheffoJeffo:

--- Quote from: ratzz on October 12, 2008, 01:53:22 pm ---Even so, I got a couple of jolts up my arm that convinced me that if I didn't know what I was doing, to stay well clear.

--- End quote ---

Right, so we should take *your* advice seriously ?

I am kidding.

When I first started out, I pulled what I termed a "boat anchor" power supply out of a Galaga cabinet and replaced it with a switcher. It was the right thing for me to do at the time (because I didn't know what I was doing), but I am really glad that I kept that boat anchor.

Too often people say things like "new and reliable" to describe switching power supplies, when what they really mean is "new and I understand how to use it".  The 30+ year old power supplies I have seem to be, in my experience, more reliable than new switchers (evidence is anecdotal, but I haven't had an "old" PS fail and have had switchers fail).

I have switcher conversion kits for my Galaga, Joust and Tron. I'm still working on boards for Tron, so I'm not using any PS yet. Joust runs on the old "unreliable" linear power supply. Galaga will be back running on the boat anchor once I clean the block up (and the one I have from an Atari Football that I'll be doing at the same time), hopefully to somewhere near BrentRadio and Peale's standards.

I think that those who haven't actually used the "old" supplies should refrain from implying that they are anything other than "old" in their responses. I have no issue with people doing what makes them comfortable (and, in fact, recommend it), but saying stuff like "more reliable" when you really don't know what you are talking about is sheddy.

But then, I'm a grumpy old man.

Necro:
So...anyone have any advice on how to test this to confirm it's working properly, etc.?  Any thoughts/info on wiring up fluorescent lights would also be appreciated. :)
Necro:
WOOOOO-HOOOO!

Ok, I figured out the issue with the AC power to the fluorescent lights - seems there's a switch somewhere that I disconnected and wasn't paying attention.  I saw two quick disconnects and realized that they were in one of the wires that SHOULD be the live wire to the fluorescent light plugs.

One down, one to go.  So, now that juice is going to the transformer properly...

There's a bunch of labels all over the transformer for various voltages.  I think one side is the AC input, the other is the DC output....unfortunately, not totally sure how to figure out what's what. Some of the output voltages are odd also (3.16, 0.4, etc.)  And I can't understand where the heck the 12v for the smaller lights on the cab came from...

Any thoughts/ideas would be appreciated.
Necro:

--- Quote from: Ken Layton on October 12, 2008, 01:27:11 pm ---Appears to be the complete AC power section of a Domino Man-ish vintage Midway video arcade game. There are TWO power transformers mounted on it. In the upper left corner of your picture is the filter capacitor bank which would have fed filtered raw DC to a power supply circuit board.

--- End quote ---

Just as an update to whomever finds this, I went through the schematics for a bit trying to figure out how to get 12V out of this, and this is bang on.  It seems the only way to get 12V (or any DC) out of this setup is to rig the entire thing, with the linear power board, up and use the outputs off the linear power board.  Definitely not worth it for a MAME cabinet since (depending on power needs) one can just use the 12v rail off of the PSU to power LEDs and the like if necessary.

I guess I'm going to have to wire up the AC to the flourescent's completely seperately.  To keep this thread clean and just on this topic, I'll post my other electrical/wiring questions elsewhere.

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