Help me diagnose this Polo...

keithsarcade

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Trying to get a customers game working, its playing blind. Street Fighter Alpha 3 in an old MKII cab with a Hantarex Polo 25" monitor. Getting 130v at the connector, fuse is good, but the monitor is completely dead. I did find a blown diode as can be seen in the first photo. I can replace it (once I learn the value), but am wondering what would cause it to burn up? Perhaps a bad flyback? That whole area of the chassis looks a little crispy, and there are (what appears to be) mouse dropping all around the flyback area. Makes sense, the owner claims he had a mouse problem before, or is this perhaps a perfect anology, maybe the flyback took a crap?
 

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shit looks pretty crispy. jesus. well, I guess first things first, make sure the diodes are good. to my understanding, when the HOT goes on these, they take the flyback with them.... kind of backwards from what we're used to with K7000s or other civilized monitors.

Chad says to check the big white block resistors running along the heatsink the HOT's mounted to, supposedly the solder joints on those break frequently.

otherwise, you're probably looking at a flyback and a HOT. and hope it's not one of those chassis that unexpectedly takes a shit again a couple months down the road like this one I got.
 
I'll start an argument by saying these monitor rebuild kits were great 10 years ago. Now adays you're taking a crapshoot because the "get well" kits aren't coming with the necessary "previously unsupplied" parts. You start reading more and more these days how people recap/rebuild a chassis and one issue gone and now they have another issue. Well it just stands to reason. If it were me, I'd order a Wei ya Chassis and install it. There is no proof that these "jap crap" models are inferior to the original boards. It'll cost you ~$75 shipped to your doorstep.

Ultimately it depends on how much time you want to spend on it. From a business stand point selling them a new chassis marking it up 10% and adding your labor., You more than likely will save them money, you get to keep the old chassis chassis and if you want t fix it and resell it go for it. Depends on what you actually find wrong. But then at that point it's your money gamble not the customers.
 
I may go that route. But am curious if theres a common culprit with these Polos.

Anyone know is these are low or high impedance? I dont have the tube here and the game is 30 miles away.
 
Looks more and more like were going to try a universal type chassis. Anyone have any expierience with these, especially on a Polo tube? Still looking for impedance ratings if anyone has any.
 
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