Seeking Schematic for Wirtual Reality Sound Labs VRA 2.0
Trying to help the kid next door with a dead two channel car audio amp.
The model (Virtual Rality Sound Labs VRA 2.0) is still being sold by WalMart, so it can't be too old. An initial scoping around makes it appear likely it's a blown MOSFET in the switching power supply which I'm guessing uses synchronous rectification as there's four heat sunk semis connected to a toroidal xformer with a jillion leads coming off it. I see two nice 12 volt high out of phase switching waveforms coming into the power supply area of the board, but no other activity there. This $%0 amp really isn't worth spending forever tracing out, but it'd probably be a snap to fix if I had a schematic to guide me. Thanks guys, Jeff -- My name is Jeff Wisnia and I approved this message.... (W1BSV + Brass Rat '57 EE) "As long as there are final exams, there will be prayer in public schools" |
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