[sdiy] yamaha spx-90 blown p/s caps

[Nate Reeves]

i think it is a linear supply but here is a pic

http://picasaweb.google.com/natere2ster/YamahaSpx90Spx90II#

i did notice that the heat sinked voltage regulator (?) was VERY hot  
to the touch, with the unit being one for only 10 minutes

my hope is that between the 2 boards i can make one fully functional!   
lol

cheers,

nate



On Oct 8, 2008, at 12:12 PM, Peter Blackett wrote:

> Dear Nate,
> from what I can an remember I think the smoothing caps on the power  
> supply are a weak point in the spx90.
> is the power supply a switch mode unit ? it has been a while since I  
> looked at one so I can't remember.
> switch mode supplies are sometimes more critical of failing caps  
> than the linear supplies.
> regards Peter
>
> Nate Reeves wrote:
>> hey all, does anyone have the schematics for the above unit?
>> i am sure i can call yamaha and buy it but i rather save $$$ if  
>> possible...
>> i plugged this thing in and it took about 5 secs for a electrolytic  
>> cap to smoke on the p/s board....
>> should i replace all caps on the p/s board or just the smoking gun?  
>> B^p
>> cheers,
>> nate
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