[vcf-midatlantic] OT: Someone that can refurbish commercial VCR?

Hello, I have a Sony GCS-50 Super Beta machine. I like the machine a lot. It works, but the audio seems to fade out after starting playback after a few seconds. I assuming a recap is needed, but I assume that if I were to recap it -- it would throw off all kinds of tuning things that I don't understand. Anyone know a reliable legit person or company to refurbish said machine? - Ethan