I wonder if you can help me,
the amplifier powers up and switch off when out of stand by, is there a easy solution that you can recommend, there was no obvious reason for it to stop working , is it a fuse or a bad relay,I would appreciate your help
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I have the manual for the Sherwood R-925 and I think they might be simlar in design. It's says for this problem check transistors Q215 and Q216 on the AMP302 board.
Of course you will have to determine if this can help solve your problem. I think the model you have is just the dolby surround model and the 925 the dolby digital, but they look nearly the same I think!
Sherwood's site has a manual for the model RV-4060 (click here to download) but not for the 4050. You might find it similar enough to help you. Otherwise you can try a Google search for generic Dolby surround connections. It's usually pretty straightforward. Connect the audio out from your source (TV, DVD player, etc.) to the receiver. Connect the surround channel speakers to the appropriate rear panel jacks. Fire up a source you know has Dolby encoding, turn on receiver's Dolby processing from the front panel, and experiment with the different modes to hear what you get. Just remember you can't break anything just by pressing buttons.