Vintage Synth Repair

Thanks for all the relies to my earlier question - I should have seen that... however I do have couple of other things confusing me on this schematic - where it says "selected for 2.45v at TPA..." - are those refering to Q8 and Q9...? And would TPA be the "A" on the base of Q7. 

Also, Q7 says "selected" but with no explanation! What is it selected for (or matched with?)

Finally, what diode could be used for D2 CL-1 ... could that be a IN34?

Cheers,
TOM

Sorry, I forgot to include the link again...
http://www.freeinfosociety.com/media/images/4142.jpg

--- In vintagesynthrepair@yahoogroups.com, "Quazimodo" <noddyspuncture@...> wrote:

>
> Thanks for all the replies to my earlier question - I should have seen that... however I do have couple of other things confusing me on this schematic - where it says "selected for 2.45v at TPA..." - are those refering to Q8 and Q9...? And would TPA be the "A" on the base of Q7. 
> 
> Also, Q7 says "selected" but with no explanation! What is it selected for (or matched with?)
> 
> Finally, what diode could be used for D2 CL-1 ... could that be a IN34?
> 
> Cheers,
> TOM
>

Hi,
 
Does anyone on the list service or know about Lowrey organs?  I have a rare
three manual GX-361 / G-7000 that needs some repairs.  The lower two
keyboards and pedals work fine.  The upper keyboard, which is a solo section
doesn't work properly.  Just about all the solo voices have a fuzzy / buzzy
sound to them and don't play in tune -- random pitches, not following the
keyboard notes.
 
To keep this on topic, said solo section sounds are polyphonic analog
synthesis generated (i.e. no samples)
 
Thanks

Yes, the solo keyboard was a Kawai K1 as I recall. It has been some time since I 
have seen or worked on one. Kawai bought the Lowrey Organ Company. 
www.lowrey.com  Russ Pfeffer, Service Manager -- Current Model Lowrey Organ 
Parts, Service Manuals, Owners Manuals, support, and service, 

Toll Free: (800) 451-5940

I think the the voices are ram based and battery backed up. Sorry been 10 years 
since I worked on a K1 and 15 since working on a G-7000. That means that on 
could dump any Kawai K1 voices into the 3rd manual. Look in the menu for a dump 
que.  The was card to reload too. All too far in my past!!!
R



________________________________

From: Samuel Adams <SamuelAdams7@...>
To: vintagesynthrepair@yahoogroups.com
Sent: Mon, February 21, 2011 7:30:41 AM
Subject: [vintagesynthrepair] Lowrey Organ Synthesizer

  
Hi,
 
Does  anyone on the list service or know about Lowrey organs?  I have a rare  
three manual GX-361 / G-7000 that needs some repairs.  The lower  two keyboards 
and pedals work fine.  The upper keyboard, which is a solo  section doesn't work 
properly.  Just about all the solo  voices have a fuzzy / buzzy sound to them 
and don't play in tune  -- random pitches, not following the keyboard notes.
 
To  keep this on topic, said solo section sounds are polyphonic analog  
synthesis generated (i.e. no samples)
 
Thanks