Vintage Synth Repair

Buying a step-down transformer is my last resort, if I can't find any 
other solution. 
But still I would prefer getting the power supply permanently 
converted to 230V. 
There's a potential problem in using a step-down transformer. If I 
remember correctly it says on the back panel of the Source that it 
accepts 110V/60Hz and 120V/50Hz, but the ónly converter I can find in 
the shops in here is 110V/50Hz, which apparently doesn't fit the 
Source then(?).

Anyway, as i understood, the power supply of the Source is built in 
such a way that this convertion should be easy to make, I just need 
the schematics...

Thanks,
Einar


--- In vintagesynthrepair@y..., Tom Moravansky <tom@s...> wrote:
> > Surely it is easier to use a step-down transformer to convert the 
> > power supply. Probably safer as well.
> > 


> > 
> I respectfully disagree.  I'm in the US and I've purchased gear from
> all over the world.  Whenever I have the service manual and can
> easily change the power over to 110v, I do it.  even so, I still
> have a number of 240v only pieces.  My solution for those was to 
either
> buya small Radio Shack step-up transformer ($40 each) or a larger
> 300/500 watt step up transformer and a European power strip and plug
> multiple devices into that.  The problem is that this solution 
requires
> that all your "non-standard" power gear is in the same general
> location.
> 
> It also can lead to stupid mistakes that you make when you're tired 
or
> in a hurry:  I have 2 Bel delays one is still 240v and the other is 
120v.
> Both use an IEC connector in the back.  I had them racked up and was
> in the process of making cables and testing out all my effects.  I
> had a step-up transformer to test Bel unit #1 (240v) and after 
checking it
> out, I powered it down and moved the power cord to the next unit.
> Powered it up and found out what happens to power supply caps when 
an
> overvoltage is applied (smoke, noise, and electrolytic fluid leaking
> all over the circuit board).  Fortunately, the unit still works 
after
> this experience (although I'm still recapping the PS board and 
checking out
> the regulators).
> -- 
> 
> 
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> Tom Moravansky                                    tom@s...