Pole Position Power Supply Blowing Fuse-Help Needed

Jedidentist

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Pole Position Power Supply Blowing Fuse-Help Needed

So my boss bought a Pole Position running a PPII board for the office. It was working fine for a few weeks, but then it conked out. More specifically, the monitor is still working (has a re-capped G07 chassis) as is the fan, but the PCB was getting no power. After packing this up in the car and bringing it home, I got a better look at the PS. I replaced all of the fuses, but noted that one of the fuses had been replaced by some weird fuse hack:

IMG_1984.jpg


The two fuses seem to be wired in parallel and replaced a 250V 7Amp fuse, the holder for which was all burned out. I can't tell what type of fuses are in that little hack board. After removing the PS, I noticed that underneath, the wire coming from that hack board was completely burned and broken. I replaced and resoldered the burned wire, and cut the "extra" fuse out of the hack board and replaced one of the fuses with a 250V 7amp...trying to go back to what was "originally" there. When I plugged everything back in, I was excited to see the PCB LED light up again and was greeted by brief PP sounds...but my joy was short-lived as it only lasted a few seconds as the new fuse I just put in was blown.

Are there any known common issues with power supplies in these? I know that sometimes the PCBs can be flaky, but is there something that typically blows fuses? Thanks guys!

Derek
 
Are there any known common issues with power supplies in these? I know that sometimes the PCBs can be flaky, but is there something that typically blows fuses? Thanks guys!

Derek


Yes, the power supplies for PPs are notorious problem-children. Do some searching in the forums; I seem to remember several threads in the past year or so.

The original design was marginal.
 
Alright, I had read a lot of those threads awhile ago, but it didn't register. I'm going to try to go with the least expensive alternative (since it's not my game) and see how it holds up. I'll swap that fuse for the correct 25amp, 32volt and remove any quick disconnects. I have a fan laying around, so maybe I'll add a second one and have it just blow on the PS. If that doesn't help, then I'll rebuild the ARIIs and go up from there. I don't really feel like buying a 20amp PS right now and bypassing everything, so hopefully this fix will help keep it going for awhile.
 
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