[sdiy] Roland SH-101 power supply

[Nathan Trites]

Check out the Tr-606, Tb-303, and MC-202 for similar PSU setups. IIRC Guest
may have written a good breakdown of the 303's supply either on muffs or
the Open Music Labs site.

Hoping you're just looking out of curiosity and don't have to repair one!
Bad transformers can make it a pain diagnosing problems since there's so
few points where you can isolate the power supply from other sections. If
you are repairing a 101 and end up needing the transformer or other parts,
let me know and I can get you sorted!

Best,

Nathan

On Fri, Aug 26, 2016 at 4:30 PM, Tom Wiltshire <tom at electricdruid.net>
wrote:

>
> On 26 Aug 2016, at 19:55, Richie Burnett <rburnett at richieburnett.co.uk>
> wrote:
>
> >> What I'd like to know is how do they get such a range of voltages (-5V
> to +15V is a 20V range) from a 9V supply?....
> >
> > Flyback converter consisting of TR1, TR2, T1, (left side of main circuit
> diagram,) marked POWER SUPPLY  ;-))
> >
> > -Richie,
>
> Thanks Richie. "Flyback converter" is the part I didn't recognise then.
> I'll look 'em up!
>
> Tom
>
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