VCR problem, video is great audio volume is too low, very low

[1234567]

Hi everyone. I have a Hitachi VCR. I did not use it for few years. First i used cleaning tape just in case. After i tried few tapes i see a strange VCR problem, video is great but audio volume is too low, very very low. I do not know what is going on and asking if somebody have seen the same problem. Thnx

[rgr]

Head (audio) dirty or damaged. Use isopropanol and printer paper, not cleaning tape.
https://youtu.be/UcIlIJiZD5k?t=220
Is your VCR HiFi?

[1234567]

Head (audio) dirty or damaged. Use isopropanol and printer paper, not cleaning tape.
https://youtu.be/UcIlIJiZD5k?t=220
Is your VCR HiFi?

Thanks for your help. I do not know where is the audio head on this vcr. The vcr os Hitachi-M768 multisystem. Does not say hifi

[davexnet]

You'll see the linear audio/control track head next to the capstan/pinch roller