I'm the one that blew it. I was trying to hook a pc atx power supply, basically i put 12v in the 5v then it shut down immediately...
I was thinking pc power colors (12v yellow 5v red) instead of jamma color coding (12v red yellow 5v) so yeah,I fried that diode it was voltage overload.
It does play,just that the sound is all screwed up....so i went ahead and got a Sharp PQ30RV21 and 6.2v 5w zener diode
I'll see if that will fix it up.
Yes. People should always replace the protections when they trip them. Lest the mistake happens again.
There is a Cirrus logic DAC chip on the PS2 board (COH-31100) but I don't think that's affected. There are analog amps on the NAMCO board and you might want to have a look on them. A good test perhaps would be connecting the RCA plugs to a regular stereo of amplified speakers and see if the sound is screwed at that point... The Sharp chip is a 3.3v regulator. You should maybe try measure it's output before trying to replace it.