Sound equipment sony hcd-rg470 turns on but does not give audio through the speakers although I have checked the headphones but I have not been able to find the fault

[color=#16a085] [b] I check the power supply of the amplifier stages, I think this uses class D amplifier correct me if I am wrong but in any case I have to check the audio I get to the pulse name ic and as I commented there amplifier power check diagram https://elektrotanya.com/sony_hcd-rg470.pdf/download.html[/b[[/color[