G07 up in smoke

mikejmoffitt

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I work in a video game store in New York City and we have a few arcade machines for customers to play. We just got a cheap Primal Rage JAMMA cabinet (looks like a Centipede-type Atari cab conversion) with the intent of putting a different game in. We left it on Primal Rage for a while just to see that it works. After I left work, I got a call a few hours later that smoke came out of the top of the cabinet and the screen was dark.

I just came in today to look at it. I opened the cabinet and smelled the magic blue smoke smell. The power supply for the game and the iso looked good, so I pulled out the monitor and sure enough the flyback has a big horizontal crack in it with some crap sticking out. I haven't tested the HOT but it may have gone too.

Prior to it blowing up, the monitor looked pretty bad. All the guns fired, but the blue gun seemed to "smear" to the right a lot, as if the transistor on the neck board wasn't turning off quickly enough. Using the controls on the neck board I could make it change a little but it still smears regardless. Also, the flyback's screen control was very offset. I couldn't make it dark enough for the image to go away - the lowest setting looked okay, and everything above was too bright with lines.

I'm probably going to get a cap kit and new flyback. My first question is if I can test the HOT while it is mounted, or if I have to remove it from the circuit.

The second is whether or not it would be worth it to just get another chassis. I see a cheap one on eBay that is for parts because of a small crack in the neck board. I believe I could fix the crack with minimal effort, so I may do that, unless anyone wants to throw a chassis my way for some reason.
 
Yup, install a capkit, a new flyback, and a new soldered in fuse. Also, test the horizontal output transistor to see if it's shorted. I unsolder and remove the bad flyback first then there's enough room to get to the wires solder to the horizontal output transistor. I remove one of the wires from the transistor to get it out-of-circuit for testing.

CAUTION: When you pull out this chassis to work on it and the fuse is blown, the main filter capacitor will be FULLY CHARGED. It will need to be discharged or you'll get zapped.
 
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