Question about Sherwood AVR-525 Receiver

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Sherwood R 525 memory loss

My receiver looses the tuned FM channels when switched off. It also at times loosed the display that indicated the inputs...

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Mark Dewey
mark@mct.co.za

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Same thing happened on my R-925RDS. The memory backup capacitor in this case is C322 on the front panel PCB, over on the far left hand side by the mains power button.

In the case of the 925 it's a 0.047F 5.5V capacitor, a small black block approx. 10mm high with 10x5mm footprint. In the service manual it's referred to as 0.047uF, but this is incorrect. Replaced it with a 0.1F 5.5V memory back up capacitor, all's well.

If replacing the capacitor, BE CAREFUL where you mount it! Putting a standard (round) backup capacitor in the exact location of the old one may bring it very close to the mains switch. What I did instead was mount mine about 2 inches closer to the centre of the board, using double-sided tape, and ran wires back to its connection points.

Posted on Jan 03, 2010

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  • Sherwood Master
  • 4,576 Answers

I have a Sherwood R925 it lost all programmed inputs like that. It turned out to be a Memory Retention Capacitor that had failed. Look on the display board inside. They are often small and low value. If you are no good at repairs it would only cost less than 1.00 for the part, so worth repairing.

Posted on Jan 21, 2009

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Page 26:

AUTO MUTING
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If it is just a 2 pin "figure of 8" type plug(shaver plug) they are available most any electronics hobby shop, or an appliance retailer. If you have trouble identifying the socket on the amp... get back to me here. Good luck:)

regards
Graeme

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