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   rec.audio.tech      Theoretical, factual, and DIY topics in      41,683 messages   

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   Message 41,261 of 41,683   
   Trevor Wilson to Trevor Wilson   
   Re: Denon - is there a back up battery?   
   29 Mar 14 11:22:46   
   
   From: trevor@SPAMBLOCKrageaudio.com.au   
      
   On 29/03/2014 10:32 AM, Trevor Wilson wrote:   
   > On 13/02/2014 7:57 PM, Sainthunter wrote:   
   >> I recently bought a Denon 'Personal Component System/AM-FM Stereo   
   >> Receiver DRA-F100' unit from a charity shop - sold for spares or repair.   
   >> Apart from a tuner issue the main fault is that after a while in standby   
   >> mode it switches off completely from standby as though the mains has   
   >> been switched off/a power cut.   
   >> Is there a back-up memory battery somewhere, I have tried leaving the   
   >> unit powered up and switched on for at least 24 hours kidding myself   
   >> that it will recharge the memory battery, if there is one?   
   >>   
   >   
   > **I don't have the service manual for that model, but most machines of   
   > that vintage use a large, low leakage electrolytic cap of approximately   
   > 20,000uF @ 6.3Volts. It will likely be near the main microprocessor.   
   >   
   >   
      
   **BTW: By "large", I mean in capacity. The physical size is likely to be   
   approximately 20 ~ 25mm high and 15mm in diameter.It may also use a   
   'supercap', which could be in the range of 0.1F ~ 1F @ 5.5 Volts, but I   
   doubt it.   
      
   --   
   Trevor Wilson www.rageaudio.com.au   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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