hi friends. i try to repair my amplifier but i stuck on silly error. on d5 and d8 i cannot get 15v. i change zeners but still same problem. any idea why i cannot get 15v from them?
it was burn power transistors 5200 and 1943. i change them and test it and see that 15v not coming. i check driver transistors too they are ok.
thank you for all answers.
it was burn power transistors 5200 and 1943. i change them and test it and see that 15v not coming. i check driver transistors too they are ok.
thank you for all answers.
hi friends i fix the 15v problem but now cannot fix the bias that VR100 cannot take down voltage on R69. it stay on 180mV. i take it out and check it the value is same but it can be bad?
and how can i math the bias voltage. what it need to be.
and how can i math the bias voltage. what it need to be.
hi, i see many roads burned on the board. i check all from schematic and fix them all now amplifier working there is nothing look bad but only thing is when i open it first left channel clip led is on and in 10 second it close and then amp working. and if there is no input signal some times a voice coming look like volume pot is have problem. i change it too but its same. any idea ?