Arcade Collecting > Restorations & repair

Vendetta PCB repair

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Mike A:
I am not sure what the interest will be on this forum. I will be posting the stuff I learn as I go along.
I started collecting arcade games in 2015 or 2016.
I built my first MAME cab a long time before that, but I was never really engaged in this stuff.
I have no formal training in electronics or computers or carpentry.
I attended U of I at Champaign Urbana enrolled in the pre med program.
After 2 years I knew I didn't love it and bailed out to help my dad expand his business.
I have been working in warehouse management ever since then.

I think that gives me a good realistic background to post this stuff. If I can do it. You can do it too, and probably better than me.

Anyways. Hopefully this is the first in a series of topics. You will see my successes and my ---fudgesicle--- ups. I will tell you when I had to lean on someone else. Questions and criticisms are welcome.

I am formatting pics and stuff. Stay tuned.

I should mention that this repair is completed already and the board functions 100 percent.

Mike A:
I bought a Vendetta PCB from Opt2Not.

https://www.arcade-museum.com/game_detail.php?game_id=10300

He had done some repairs to it, but it needed more and he would rather have the money than the headache.

Vendetta is  a JAMMA PCB. You have probably seen that term thrown around here.

This is the pinout for the JAMMA standard.


I will go more into that in another thread. I plan on explaining JAMMA and how it can and should be used in your cabs.

Mike A:
He gave me the bro price for the board.

He said audio was not working. I thought that would be a good repair job for a guy like me.

The board mostly worked, but had one isolated problem.

Mike A:
The first step for me was to boot up the game. After all it mostly works as is.



Many arcade boards do a self check on boot up.

This one showed a bad ROM, but the game continued boot up and I could play the game, but no sound.

Mike A:
So next I did a physical inspection of the board with a magnifier. I will explain why that should have been the first step now.





The audio amp was fried. And there was no heat sink on it. I have seen no heat sink on several boards I have acquired.

Upon inspection of the schematic the amp installed was the wrong one.

It tested bad on my meter. I wasn't sure if this amp fried or if the previous one did since this one was a replacement. I will explain how that works in another thread. And then I will put a link back here.

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