Sonab R4000 HiFi amplifier - Overhaul pt1

I don't normally accept HiFi equipment in for repair other than the HMV Stereomaster radiograms & stereograms that I've worked on & was dealer for since the 70's. However, I thought we'd try & help this local customer with this one. The copyright police have muted some of the audio as it detected ten seconds of a pop song playing. Recorded 10th September 2021 Richard, G0OJF Lincolnshire, UK