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Sherwood AI5010 no sound from either channel

I recently purchased a 2nd hand Sherwood amp but on arrival I couldnt get it to produce any sound ( I think both channels are blown). The power button lights up but having checked the speaker selector, balance input selector etc. there is still no sound. Any idea how to fix this problem?

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  • camera9 May 11, 2010

    Let me say upfront that I can't help you. However I do hope your problem was fixed. I'm wondering if maybe you could help me? I'm looking for the user manual for the very Sherwood amp you have - the AI5010. Would it be possible to obtain a copy in some form from you. It would be a big help if you could.
    regards, Cam 

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Hi There DEKCAT
Its very unusual for both channels to blow......

I suspect that there is a blown power fuse inside the case......

There are fuses sometime located on the outside rear of the case and these can be easily checked to determine if they are blown..If you find one is blown please replace with the corrrect rated fuse,..... its current rating wil be on a small label on the case outside rear. like 1.0amp, or 1.5amp etc...

If you need to go inside the case please ensure the power plug is removed from the wall socket first.

You will find small glass fuses in the DC power supply feeds and probably one of these has blown, once again replace with the correct rated fuse.

Im not sure if your amplifier is a FET type or a large 32-40 pin IC type as if these are blown you will need a service person to do the replacement...

Please note there is a small relay that clicks 20seconds after turn on at the switch....if this click is not happening then there is problems with the timer circuit or the relay itself...

This relay controls the output to the speakers and as such stops all the sound output if its not working...so the first thing is to check all fuses, if they are OK then check the Relay operations....

Cheers From YUBEUT

Posted on Nov 16, 2007

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