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Question about NAD T763 Receiver

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Volume and multi channel output issue

My nad T763 currently 11mnths old decided to loose output on both main speakers and rear speakers, but centre and sub output still work. but! centre and sub are either flatout or nothing. volume is flat out regardless of volume position unless it's at infinite db, and as soon as you move it 1 step of infinite it goes flatout again. protection circuit doesn't cut in and all modes work as normal. centre and sub obviously only work in surround modes. any clues anyone?

Posted by jason rodgers on

  • jason rodgers Jun 27, 2007

    thanks for the post cheebster, i also forgot to mention that this problem occured when i turned it on from standby after coming home from work. it hadn't been turned on since the night before and was working fine when it was switched off for the night. also the area i live in has been reknowned apparently for power spikes and such. do you think this might have affected it whilst in standby? oh and i realised it is still in warranty so has now gone to the dealer for repair. thanks again

  • Anonymous Dec 22, 2008

    I lost the power coming out of the pre amp sub 's both chanels

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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.

Posted on Jun 26, 2007

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