NAD with faulty phono

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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
 
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