Remove the amp section from AV receiver??

I have a NAD T775 AV receiver that has long been plagued by issues. Despite a dead display-screen and random sound drop-outs while watching video, I really enjoyed this AVR. It just sounded really good to my ears. Unfortunately, the random sound drop-out is now a permanent drop-out so I'm debating on what to do.

I could just send the unit to an authorized repair shop and see what the diagnosis is. Even if I decide to have it fixed (which I doubt will be cheap), I won't use it in my main system because it doesn't support 4k HDR.

But rather than just letting a big black box collect dust, maybe I can gut the T775 for parts and create a DIY 7-channel amp with the components. Albeit a wild guess, I think the amp section of the T775 is probably fine and the problems most likely lie in the related electronics (video, dsp, etc). Just a hunch.

I'm not committed to doing this yet, just trying to flesh out the idea. Would appreciate any comments/advice/feedback.
 

ubergeeknz

Member
2018-08-31 12:32 pm
Its most likely possible. Many recievers I've seen have discrete amp sections (I guess so they can reuse the channel design when they need a bunch more channels for the next 12.4 standard or whatever) See if you can find a service manual, it will provide some clues, but so will lifting the skirts to see what lurks underneath [emoji6]
 
Its most likely possible. Many recievers I've seen have discrete amp sections (I guess so they can reuse the channel design when they need a bunch more channels for the next 12.4 standard or whatever) See if you can find a service manual, it will provide some clues, but so will lifting the skirts to see what lurks underneath [emoji6]

I have a copy of the service manual. Will post in the morning.
 
The pdf file for the service manual is too large to post whole. Here it is in 8 page sections.

Thanks again for any insight.
 

Attachments

  • NAD T775 SM pg 1-8.pdf
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  • NAD T775 SM pg 73-80.pdf
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  • NAD T775 SM pg 65-72.pdf
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  • NAD T775 SM pg 57-64.pdf
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  • NAD T775 SM pg 49-56.pdf
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  • NAD T775 SM pg 41-48.pdf
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  • NAD T775 SM pg 33-40.pdf
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  • NAD T775 SM pg 25-32.pdf
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  • NAD T775 SM pg 17-24.pdf
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  • NAD T775 SM pg 9-16.pdf
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The rest of the service manual.
 

Attachments

  • NAD T775 SM pg 113-120.pdf
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  • NAD T775 SM pg 105-112.pdf
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  • NAD T775 SM pg 97-104.pdf
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  • NAD T775 SM pg 89-96.pdf
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  • NAD T775 SM pg 81-88.pdf
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  • NAD T775 SM pg 121-128.pdf
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