Namco Exceleena: My Power Supply Exploded

I bought a Namco Exceleena today (yay, finally got a candy cab!). Pretty sweet, right?

Unfortunately, after having played with it for a few hours, I changed a PCB, turned on the cab, and it ran great...for all of 20 seconds, and then there was a pop of electricity, followed by a foul smell.

Upon inspection, the following board was rendered useless:

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Closeup

Lochlan said:

I have no idea what this board is (isolation transformer??). It's mounted on the thing with volume/degauss/power.

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This is the power supply (thanks Hewitson!), a fact I should have known, heh.

I haven't checked the traces to see if the board is salvagable, but it looks pretty bad.

1) Is it possible to get a replacement? I know parts for these cabs are hard to come by, but I'm hoping that maybe there's some kind of generic substitute.
2) If it's not practical to replace it, what are my options? (RJ, can you fix this?)

I'm willing to order parts from overseas or otherwise do whatever is necessary. Any help is appreciated!

Edit: The JAMMA board I changed was basically just leaning up against the side of the cab, sitting on some paper (stupid), so something may have shorted? Also, when I turned the cab back on, after this happened, the monitor appeared to work but there were some blue diagonal lines running accross it.

Thats the power supply. Simply buy a new unit with a PCB similar in size, decase it and mount it in place of the old one.

Hewitson said:

Thats the power supply. Simply buy a new unit with a PCB similar in size, decase it and mount it in place of the old one.

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Awesome.

Any old power supply will work? I have a spare US arcade power supply.

Ideally I'd like to just buy a replacement with the same connectors on it...but I'm guessing that's not realistic?

What should I buy?

Prior to my previous post I had a quick search for somewhere that sells those power supplies. Unfortunately I couldn't locate anywhere, which is why I suggested decasing another unit.

Alternatively you could replace the transformer and blown fuse on your existing one, but with that amount of burn on the board I'd be throwing it out.

It sounds like this wasn't user-induced, more along the lines of an unfortunate hardware failure. The specific component that gave up the ghost is a transformer.

They usually let out a puff of smoke and fill the room with that bitter sweet smell.

Finding a replacement Exceleena PSU might prove to be difficult, so I would recommend wiring in a US power supply or possibly attempting a repair on this one. See if you can locate a part number on that transformer. You may be able to find a replacement and just repair it yourself. It doesn't look like the PCB itself is damaged, it just has some smoke silt on it.

My guess is diode D7 (the cracked one) shorted then took the transformer with it.

Looks like a shitty power supply design. They are supposed to go into shutdown if there's a short in the output section, not into burn-up mode.

I doubt you can get a replacement transformer. You'll need another supply.

Does this one have some oddball output voltages? If not, you can probably hack a Peter Chow type switcher in it.

RJ

Hi, there.I have carried hundred's of this cabs, but this power unit won't die easily.They have very long life, have plenty of them still working withought any trouble after over 10 years. This pow. unit is still avalable from namco, if you don't mind about cost. I highly do not recomend to use it again by fixing it, as I have same opinion as others and really need to check the transformer and replacing might be needed. Anyway, need to check why this happened, or else, you'll end up the same again. This cab. short circuits easily. I suggest you to earth stun wire correctly, clean inside the cab., check wirings (or may need to swap wires since, blew up badly) from your power cable to transformer, also to this pcb with multimeter. This cab. has knife-edge everywhere so, be carfull not to cut yourself.