The Yamaha Low volume and no Heas phones/aux

Hi guys sorry to bring this up again about the keyboard Yamaha PSR76 that have sound both speakers but it's very low dispite i raising the volume up it goes from no sound to good sound like it should exept with level all the way up the sound is good but very low,and have no Headphones/Aux sound at all.i changed the 2 channel amp IC LA4598 and still no change,all ellectrolitics are ok i use a ESR tester, i now suspect C4570 a 8 pin amp, or the volume switch, but not shure, is there a way to jump the volume swich either it stays off or high? and i don't want to spend no more money on this thing.what you guys think about this any idias,Thanks in advance.

Ivetech, perhaps it is possible to simply disconnect the volume switch?

Jeffie wrote:

Ivetech, perhaps it is possible to simply disconnect the volume switch?

What about The Headphones/Aux output that doesn't work
i'm more inclined to the IC4570 to be faulty,when i get hold of a ic i'll replace it and see.this what happens when we don't have a osciloscope we try to shoot in the dark oh, well i just do this as a hobby not gonna buy expensive testing Equipment.

ah yes. right i forgot


I hope you'll soon find the IC4570 and it will solve the problem. Good luck