Vintage Synth Repair

On Tuesday 01 April 2008 08:04, Scott wrote:
> --- In vintagesynthrepair@yahoogroups.com, "fsimon100" <fsimon001@...>
>
> wrote:
> > Hi,
> > I just joined. I found three nonworking synths and bought them for
> > $30 each. A Prophet 10, Korg Trident mk II, and Roland Super JX 10.
> > 1)The Prophet has some regulators in wrong. The 12v and 5V were
> > backwards but the 12V should have been fixed voltage and had a
> > varible regulator instead of fixed Vreg without feedback resistors.
> > Hopefully that fixes that. There may have been some big voltage on
> > the 5V circuit. I'm a little concerned because that reg open loop may
> > have been 37v. It lit up though while wrong just no sound.
> > 2)The Korg had a memory battery leak on the board and fried some
> > traces. So PCB repair and new battery may fix that. I like my odds on
> > this one. It lit up too but no sound.
> > 3) The Roland has good Power supply but nothing lights up. The whole
> > top LCD or LED plus all the buttons are out. I could appreciate
> > advice or if anyone has a schematic would help. If I get one synth
> > working I made a good purchase. I'm optimistic on the first two. They
> > light up and look like they want to work.
> >
> > Thanks,
> > Frank
> >
> > I'll talk about my Hammond H-100 problems later.
>
> I have Hammond H-100 parts

I have a couple or three loose-leaf binders full of Hammond stuff I haven't 
even looked at yet.  What kinda parts do you have?  It's been so long since I 
did much work on Organs (probably stopped around 1985 or so) I don't even 
remember the H-100...

-- 
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