I've had a local chap look at my Sherwood AX-7030R, he can normally mend most things and he says the standby circuit voltage regulator has had it. He can't get one.
Where can I get the bits please, or the wiring diagram for it?
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Re: Sherwood AX-7030R amp - doesn't switch on.
Something doesn't sound right. The standby circuit is usually very simple. The "regulator" is just a transistor. Can you request and post the parts that he/she can't find. I should be able to get you a source or substitutes.
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on ur subwoofer u will see HPF output, connect this output to MAIN IN of ur power amp (first remove jumper between pre-out and main in from ur power amp) connect pre-out of ur power amp to input 2 L&R (Left is also for mono input). the HFP selector switch will cut off 80Hz or 100Hz to the main input depending on the position enabling u to have high frequency sound on your main speakers. connect the speakers to the main output terminal of ur power amp. do not connect speakers on the woofer ouput.
make sure u are using the right impedance speakers. do not switch speaker impedance selector while the unit is on.
Ususally this fuse (if there is one) is located near or in the socket. Unfortunateley I don't have a photo to discribe to you, but it might be under the black counterclockwise cap or at one square area just under (or above) the socket.
In case of a problem or clarification, don't hesitate to post.
Thanks and regards Please kindly rate this solution Stelios direct FixYa link: http://www.fixya.com/users/technical114
It is rare for the actual input connectors to fail. More likely, either the solder connections need to be re-flowed, or the switching IC is defective. If you can solder, try resoldering the pins of the RCA connectors. Look closely at them and see if the PC board trace is broken. If the resoldering fails to resolve the problem, look for a switching IC with about 28 pins. It may be marked TC9163 or something similar. That will be the audio switching IC. I would change that next.
I've encountered such a problem in the past, these kind of mischiefs are played by digital devices. Actually the programable I.C. of your amp has encountered a problem in the internally built gates so you would have to replace it and get its logic coding from the website of the company your amp belongs to.