I need guidance on the Victor A-X900 (JVC A-X900B). The issue is not yet resolved.

[opusadat]

I picked up a Victor A-X900 (JVC A-X900B) a few days ago, however its right side isn't functioning. The biassing IC (Super-A VC50022-2) appears to be burned out or damaged as of right now. I can't find a reliable place to get this IC. I tried using an equivalent circuit diagram that I found in another JVC schematic. which is not properly working! from my limited or lack of knowledge, I can't detected the problem. I've shared the detailed schematic.

It would be greatly appreciated if you could give me some advice on how to resolve this issue.

Thanks