From: et472@ncf.ca   
      
   On Thu, 13 Feb 2014, 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?   
   >   
   It would depend on the vintage.  After a certain point, there were high   
   value capacitors in very small packages that were used to keep memory   
   alive.   
      
   Don't leave it in standby, let it run for a decent amount of time at low   
   volume and see if that solves the problem, which isn't really stated but   
   would seem to be that the memory doesn't keep remembering.   
      
   The weird thing is, a lot of recent equipment never turns off. The on/off   
   switch controls the secondary of the power transformer (one reason being   
   that it avoids bringing the 120VAC from the wall to the on/off switch and   
   then back to the transformer), and so those can keep memory alive with a   
   trickle of power from the power transformer.   
      
      Michael   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)