Vintage Synth Repair

HI,
in a lot of older power supply units its likely that the electrolytic
smoothing caps may need changing .
this applies to both the linear and the switched mode supply units .
modern electrolytics may be smaller that the older ones you are
replacing .you should always use caps with at least the voltage rating
of the ones you are replacing .I't not a good idea to increase the
capacitance value of the replacements as this can cause other parts to
fail [ such as the rectifier diodes ].
remember that a switched mode supply will need a load on it to work
corectly .
regards Peter 

ethanzer0 wrote:
> 
> I have an old +/-15v .5A power supply that is very noisy and I
> suspect it is in need of servicing; potentially a rebuild.  Does and
> body have experience doing this kind of thing?  I have schematics and
> a service manual and my scope should be here monday.
> 
> Any help will be greatly appreciated.
> 
> Thank in advance,
> 
> Ethan
> 
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