Sony CFD-G770CPK, woofer not work

Me gustaría q alguien me apoyará con el diagrama de este aparato mi problema es q el integrado q va al woofer no funciona me gustaría saber sus características para poder reparar gracias de antemano

I would like someone to support me with the diagram of this device my problem is that the integrated one that goes to the woofer does not work.
I would like to know its characteristics to be able to repair
Thanks in advance