AMP ID and burnt resistor help
Posted: Tue Aug 29, 2017 9:27 am
Hello all!
I have what I think is a MS2250 TA. REV E
It has some burnt resistors and only passes very low audio.
R169, R128, R228, R225 are burnt. They look like 1/4w from the power rails into the differential amp section ( very rough guess)
Wondering what may have caused that? History? I could just replace them, but sure seems like they may have failed for a reason.
So far nothing else seems bad. checked a few of the transistors for shorts, caps do not seem to be leaking etc...
I have what I think is a MS2250 TA. REV E
It has some burnt resistors and only passes very low audio.
R169, R128, R228, R225 are burnt. They look like 1/4w from the power rails into the differential amp section ( very rough guess)
Wondering what may have caused that? History? I could just replace them, but sure seems like they may have failed for a reason.
So far nothing else seems bad. checked a few of the transistors for shorts, caps do not seem to be leaking etc...