Vintage Synth Repair

Hi Bob,
I was curiouse if you took the Hammond H apart and took any photos 
like you said you may do.
Frank

--- In vintagesynthrepair@yahoogroups.com, "Bob" <bobmannn@...> wrote:
>
> It has to be taken apart from the top and the front, actually.
> The keys are screwed in from the back, but the key has to be slid 
> back to disengage it from the key comb. The black panel on the 
front 
> has to be removed to slide the key back.
> What is your time frame for doing this? I was planning to repair a 
> couple keys on one of the H's in the shop this weekend...I planned 
to 
> photograph the process for my picture collection, if this would 
help 
> you.
> 
> Bob
> 
> 
> - In vintagesynthrepair@yahoogroups.com, "fsimon100" <fsimon001@> 
> wrote:
> >
> > Bob,
> > Thanks. I'm certain I need to take it apart and fix it properly. 
> Your 
> > picures gave me great insite of the mechanics. Does it 
disassemble 
> > from the front or start at the top and work down? 
> > 
> > Also the very low volume I'm assuming is unrelated because I can 
> hold 
> > the preset keys down to hear the organ. As I said the finals are 
> > good. Where would you recommend I start scoping the audio signal.
> > 
> > --- In vintagesynthrepair@yahoogroups.com, "Bob" <bobmannn@> 
wrote:
> > >
> > > The preset keys can have the same problem as any of the 
> keys...that 
> > is 
> > > that dirty contacts will prevent them from operating. I had the 
> > same 
> > > symptoms on my H when I first got it, and still do from time to 
> > time on 
> > > those keys that see little usage. Normal operation on mine 
> returns 
> > when 
> > > I hold the Cancel key down and tap the offending key rapidly 20 
> or 
> > so 
> > > times to clean the contacts. Maybe you will get lucky and this 
> will 
> > > help...at least it is worth a try.
> > > As far as the key not staying down, this is not too hard to 
> > > fix...however getting to the mechanism can be a challenge, 
> > especially 
> > > on the lower manual.
> > > The mechanism is simple; there is a spring loaded bar that 
swings 
> > on an 
> > > arc under the preset keys. When a key is pressed, a 
> > flexible "finger" 
> > > under the key holds on to that rod. The Cancel key pushes that 
> rod 
> > away 
> > > from the finger, and releases the preset key.
> > > When the preset key no longer stays down, the "finger" is 
> probably 
> > worn 
> > > or stuck with dried grease, and can be cleaned and/or bent 
> slightly 
> > to 
> > > restore it, assuming the finger is not broken.
> > > I can send pictures of the mechanism if you would like.
> > > In order to reach the mechanism, the keys obviously need to be 
> > removed.
> > > If you have never done this, please let me know and I can walk 
> you 
> > > through it. Also, if you find broken parts during the process, 
> > please 
> > > let me know as I  have a couple H's in pieces out in the shop 
and 
> > would 
> > > be glad to donate what I can.
> > > Bob
> > > 
> > > 
> > > --- In vintagesynthrepair@yahoogroups.com, "fsimon100" 
> <fsimon001@> 
> > > wrote:
> > > >
> > > > H-100
> > > > My preset keys won't stay engauged. How do you disassemble to 
> get 
> > > > underneath keys to fix. Also I have low volume if I hold them 
> > down 
> > > > manually. 
> > > > I know final tube outputs are good but not sure where the low 
> > signal 
> > > > is. Do I scope out from the tonewheel somewhere then at a pre-
> > amp. 
> > > Like 
> > > > I said I injected a tone into the final tube amps and have 
> strong 
> > > final 
> > > > stage.
> > > >
> > >
> >
>