Hifi have a NAD 710 and one phono input is not working. Everything else works fine. Any ideas please.
there is no magic solution ...the question is wrong trouble shoot a few basic things first and then place a question It could be more or less a million things ....
Probably some “idiot” plugged a line source into the phono input, and blew it. Or not… but it remains the likely problem (could be static discharge, ground-fault or ground-loop problems while plugging in creating a ¹¹⁰/₂₂₀ volt tip-to-ring voltage. Lots of reasons)
Anyway, if so, then replacing the first transistor in the chain is also most likely the cure. That, and if it has a series DC blocking capacitor, it too could/should be blown. I'd replace the pair if I had precisely no troubleshooting/metrology equipment. Heck, if the parts were in my “crazy box of coveted doohickeys”, I might even just replace them both before digging heavily into the metrology.
Just saying…
GoatGuy
Anyway, if so, then replacing the first transistor in the chain is also most likely the cure. That, and if it has a series DC blocking capacitor, it too could/should be blown. I'd replace the pair if I had precisely no troubleshooting/metrology equipment. Heck, if the parts were in my “crazy box of coveted doohickeys”, I might even just replace them both before digging heavily into the metrology.
Just saying…
GoatGuy
PS: … and recognizing the ground-loop-kills-sensitive-inputs problem, I would in the future disconnect all devices from mains WHILE connecting stuff up. As good measure. Best practices and all that. GoatGuy
Goat ....you a rushing to wrong conclusion to begin with NAD 710 dont even have a phono stage so either the question is wrong
or the OP has a turntable that RIAA preamp is included ....
or the OP has a turntable that RIAA preamp is included ....
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