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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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