Hi everyone,
Its a stereo amp thats supposed to deliver 450W rms per channel into 8ohms.

One channel (right) is very quiet but I can just hear it through the speaker
I have attached, the second channel is louder but not by much Im assuming
the amp is blown somwehere, does anyone know any common faults that would
cause this in this particular model amp or have any idea where I should
actually be looking?
I can provide photos if that will help.

Also would anybody have a schematic diagram for this?

Cheers!