First off there is no such thing as a phono connector. The correct term is RCA connector as they were the ones that came up with it. If you're using a VCR then it's RCA connectors are composite video (yellow RCA connectors) and line level audio, as opposed to component analog video (R, G and B cables RCA connectors) and audio.
If you have already exhausted menu settings I've made a video where I outline 2 solutions I use.
https://m.youtube.com/watch?v=hKjt3x4WtWU