Vintage Synth Repair

Thanks,

there's no short read between ground and -15 rail on the board, when 
cap is removed. The PS supplies -15v when unconnected. The rating of
the tantalum is 25v and it is placed correctly.

One thing that I must note - when first connecting the PS, I used
smaller heatsinks than required for the regulator. Could the -15v
regulator go bad even though it still supplies -15v when the PS in not
connect to the board ? 


--- In vintagesynthrepair@yahoogroups.com, scott frye
<painintheamp@...> wrote:
>
> Tantalums are not at all forgiving in a reverse bias OR over-voltage
setting.
> Remove the cap and see if you actually have a short circuit first.
Then make sure the voltage ISNT more than the cap rating. Otherwise
it's POOF again.
> 
> gil_we <gil_we@...> wrote:                               Hi all,
>  
>  I'm trying to solve a problem with a P5 I just got.
>  
>  It looks like the -15v rail on the main board is shorting.
>  Each time I'll power it up, the 10uf tantalum capacitor which filters
>  the -15v is getting fried and open (shorting) immediately.
>  
>  Any ideas where to start looking at ? Any common parts on the P5 with
>  are known to short over time ?
>  
>  Thanks for the help !
>  
>  
>      
>                                
> 
> 
>   Scott  Frye
> AudioFixation
> Consumer / Pro Audio Repair
> Southern VT 
> 
>   
> 
> 
> 
>  __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around 
> http://mail.yahoo.com
>