I have a 25-year-old NAD 7120 receiver. After a few years of not using it, now there is an occasional crackling noise from speakers, and each speaker comes in and out at random. I have checked the speaker outputs and the inputs at the speakers, to no avail. Could it be dirty pots?
SOURCE: volume and multi channel output issue
Hi there. Are you familiar with board level repair for such products ? Your problem is most likely hardware. Either some of the final output transistors are fried, or it's a dsp problem, a regulator, a diode, a transistor in the circuit.. it could be a lot of things. But if everything was working fine and it quit someday without a change in the system's setup, it really looks like an hardware issue ! Do you have a way in the manual, that sets factory defaults, a kind of reset ? A lot of such units do have that. Try to unplug/interchange speakers as well, a shorted speaker could make the amp go nuts as well, but i wouldn't bet on it. Still, i'd check that out. Hope that helps ! cheebster.
SOURCE: NAD T762 - no sound
Try reseating the prologic/output board. Second one from the right (from the front of the reciever), that fixed my no sound problems on many channels. You will have to take out a few screws to remove and reseat it, and while you are at it clean the connections.
SOURCE: nad 214 amp
problem is- intermittent speaker relay. You can cleaned contacts or better upgrade relay to better one (sealed) Dariusz
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