Hi everybody, I'm new here 🙂
So my NAD stopped working without any warning after 8 years spent together. The power indicator turned red. After a cooldown I tried to turn it on and to my amusement the light turned green and the amp worked for 20 second or so, then I heard a crack, light went red and music stopped playing. After turning the thing off the red light stayed on and slowly faded for quite a some time. I turned it on again and the same thing happened, but green light only stayed for about 5 seconds. During the next try, the light came off almost immediately. After that it wouldn't turn green at all (but the whole scenario repeated when i tried to turn it on next day).
I've read some posts considering NADs 304 common faults and repairs (potentiometer, resistors and relay upgrade), but my situation seems a little odd (the amp works for a little bit).
I will be grateful for any advices and tips.
So my NAD stopped working without any warning after 8 years spent together. The power indicator turned red. After a cooldown I tried to turn it on and to my amusement the light turned green and the amp worked for 20 second or so, then I heard a crack, light went red and music stopped playing. After turning the thing off the red light stayed on and slowly faded for quite a some time. I turned it on again and the same thing happened, but green light only stayed for about 5 seconds. During the next try, the light came off almost immediately. After that it wouldn't turn green at all (but the whole scenario repeated when i tried to turn it on next day).
I've read some posts considering NADs 304 common faults and repairs (potentiometer, resistors and relay upgrade), but my situation seems a little odd (the amp works for a little bit).
I will be grateful for any advices and tips.
I'd be taking a long hard look at the solder joints of everything that gets warm and/or is heatsink-mounted, like voltage regulators, power transistors and the like.
Check ALL the supply voltages.
Check output DC offset on both channels.
Visually inspect for other issues like corroded part legs.
It's certainly not impossible that some transistor (though probably not one of the outputs) or voltage regulator IC has developed a bonding problem, but it could be a lot of things at this point.
Check ALL the supply voltages.
Check output DC offset on both channels.
Visually inspect for other issues like corroded part legs.
It's certainly not impossible that some transistor (though probably not one of the outputs) or voltage regulator IC has developed a bonding problem, but it could be a lot of things at this point.