Re: anything new in the vr-5000 clock battery backup by no...

Maybe one could disconnect that battery and see if the contents get lost,of course if you have a backup from that computer program or if you dont have that much in there,let us know!I'll see what I can do to make a test also,so if this is just a buffer,then we should be able to find out what part of that control ic can be set up with a backup battery,i am studyin the schematic as best as I can

--- In [email protected], poldhu1901@... wrote:
>
>  
> In a message dated 05/09/2010 23:52:36 GMT Daylight Time,  
> martin_cook@... writes:
> 
> Hi  there - I see on the schematic for the control unit there is a 7.2volt 
> nicad  at the lower left side drawn in in dotted lines as though it's an 
> option. I  have replaced similar backup batteries with 'supercaps' in the past 
> and they  work quite well, keeping the memories alive in my NRD515 receiver 
> for more  than a fortnight. 
> 
> 
> ----------------
> Hi Martin
>  
> I think the problem referred to is that of the VR-5000 losing its clock  
> data if disconnected from the mains,  the memorised frequencies seem  to be 
> stored in non-volatile devices so shouldn't be an issue.
>  
> I wasn't previously aware of the 7.2v Ni-Cad but online  comments suggest 
> it's fitted to act as a supply buffer, to deal with  problems of the CPU 
> resetting itself with supply glitches, rather than for data  retention.
>  
> regards
>  
> Nigel
> GM8PZR
> 
> 
> [Non-text portions of this message have been removed]
>