Sony MU-L021 schematics request

[Script]

Looking for schematics. It's a compressor plus noise gate from the mid-1980s. Allegedly smooth sounding.

Should anyone have the schematics, could you please share and/or upload to Tech Doc section.

Thanks.

 

[Script]

On the net somewhere it said it's a VCA comp. I don't see a VCA IC in it. But a bunch of transistors .. this is 1986/87.

 

[kags]

The top panel of the box seems to indicate that it is indeed VCA...
(Image from a Reverb listing)

 

[Script]

There's a HTV P1501. But that's a photocoupler, I'd think.

The rest are TI TL072, Sharp IR94558 and some 6558 -- all op amps.

So my theory is that those transistors form some kind of Blackmer Cell variant maybe. Or it's overall more like a fet comp...