well...
really too soon to tell (after about 30 minutes of disappointment).
i thought the only suspect for me now is the relay itself!!
actually i was suspect it from first place... but because it was just thinking..and you are the one that really experienced and has the knowledge.. i thought of transistors (no blame of course...only thanks and praise for you
@petehall347 )
so..i thought its the time of using the advantage of an old Youtube i saw about cleaning relays... (maybe 1.5 years ago..)
i cleaned it with deoxit and after with I.P.A alcohol.
i dried it with hair dryer...and..perfect!!! (until now for the last 20 minutes).
it also got rid of the -40mv on the Left channel it had. (now -25mv)
also got rid of the mis-balance in volume it had. (volume & balance and all other potentiometers are already deoxit like new so i knew it's not them..)
and also when the volume knob was all the way down..i also could hear a quiet music from the radio (didnt check with aux/phono)... this also dissapeared!
seems like the relay contacts has a lot of affect!
@petehall347 huge thanks for you! and for all your efforts and patient and willing to help!
thanks a lot!
(hopefully i wasn't happy too early...)
now i left with the AA-1135 to solve...
bought today also the differential transistors for him...maybe it will solve the shorted right channel!
will update...