Pioneer SX-650 protection circuit troubleshooting

This is awesome. My spare sx-650 doesn't have the opamp microcircuits in phono stage. It has a factory built PCB with discrete components instead. I wonder which came first.

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I remember this. You can rebuild them. It's a little difficult to get it but you can remove a few things and gain access.
Desolder the web harness's and your in like flint.
I couldn't find a scat but the transistors are standard issue Fairchild 992's and 1845's. Match up the caps with Nichon ULK's
 
Going to wait for the microcircuit to arrive, just don't want to drill the chassis to install the board from another receiver.
 
Hopefully the new microcircuit from local distributor and light bulbs from Dave (dgwojo) will arrive soon.

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