I was at my office and a small spark of static electricity from my hand has killed my subwoofer. The unit is UNGROUNDED...I can hardly believe it, but it is. It has it's own power supply and a relatively simple amplifier. I intend to add a ground to the unit!
If I plug in the unit, I get a hum and that's it. It doesn't matter if there is an input plugged in or not. Does anyone have any recommendations as to which components I should try replacing first?
Here is a listing of the components on the board:
Transistors: TRANS PWR NPN 10A 60V TRANS PWR PNP 10A 60V TRANS PNP GP 800MA 45V TRANS NPN GP 800MA 45V
Capacitors: CAP 4700UF 25V ALUM ELECTROLYTIC RADIAL (2 for the power supply) CAP .47UF 50V ELECTROLYTIC KMG RAD CAP 470UF 25V ELECTROLYTIC SMG RAD CAP 10UF 25V ELECTROLYTIC SMG RAD CAP .0012UF 50V POLYESTER CAP .0027UF 50V POLYESTER CAP .1UF 50V POLY B SERIES
Resistors: RES 4.7K OHM 1/4W 5% CARBON FILM RES 47K OHM 1/4W 5% CARBON FILM RES 220K OHM 1/4W 5% CARBON FILM RES 150 OHM 1/4W 5% CARBON FILM RES 100 OHM 1/4W 5% CARBON FILM
IC: IC OP AMP HI PERFORMANCE 8-DIP
Any advice is greatly appreciated!
Thanks, Joe