Recently I picked up a "fully working" Yamaha A-560 amp for cheap and it has one small problem - it isn't fully working (gasp)... Sound coming from the left channel is distorted. What I've found out is that both output transistors of that channel were not even connected to PCB. After checking them it appears that both are dead. Does the fact that I have sound (albeit distorted) in left channel indicate that I can just put in new transistors and everything will work? Or should I check something else before putting in new transistors? I don't want to put in new ones only to see them going dead. I am able to tell capacitor from transistor, to read simple diagrams and to use digital multimeter, but I'm far from electronics expert.
Other interesting thing is that instead of 2SA1106 and 2SC2581 this amp has 2SA1186 and 2SC3263 in both channels. And as far as I can tell the right channel works perfectly fine with these transistors. So I decided to go with the same transistors for the left channel. Is this decision smart?
Other interesting thing is that instead of 2SA1106 and 2SC2581 this amp has 2SA1186 and 2SC3263 in both channels. And as far as I can tell the right channel works perfectly fine with these transistors. So I decided to go with the same transistors for the left channel. Is this decision smart?
