No abuse apparently, owner plugged in a new microphone and blew one channel. Seems to have knocked out expensive instumention op-amp ( comparing the 2 ). I don't like the look of the electrolytic at the input, no input dropper resitor and a 48V phantom supply involved. Anyone any ideas ? don't fancy spending out on an expensive Burr Brown IC if it is only going to happen again. I've not often dealt with kit with phantom supplies - can any one direct to a resource of generic probs associated with 48V on signal inputs?
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on
formatting link