[sdiy] Digital schemos for memorymoog anyone?

[Grant Richter]

1. IMHO always suspect solder flakes on the PC board. They took the  
Space Shuttle down 5 levels of redundancy, and that was NASA solder.

2. Turn the whole keyboard over cover open on a large towel and  
gently tap and shake the garbage out of the bottom and from  
underneath all PC boards.

3. Inspect the garbage on the towel to make sure there are no solder  
flakes, coins, pieces of trimpot, key whiskers, itty-bitty screws,  
lost dental filings, paper clips, christmas ornament hangers. tinsel,  
glitter, metalized confetti, good luck charms, bra underwires,  
showgirl eyelashes, knives, bullets, bullet fragments, packets of  
aluminum foil (empty), fake security badges, razor or Xacto blades,  
remnants of pyrotechnic displays, pieces of cigarette packs, gum  
wrappers, bristles from metal hair brushes, broken teeth from metal  
combs or any other tiny little piece of sh!t conductor that no one  
knows how it got there to intermittently short traces out.

4. Inspect the rest of the garbage on the towel to make sure no  
"bits" fell out. If so, they will need to be replaced in the ROM.  
Handle the bits carefully in case they have "bit rot". If they do,   
they will crumble before you can get them back into the ROM.

Good Luck

On Mar 12, 2007, at 8:53 PM, Bob Weigel wrote:

> This thing started flailing as soon as I got it set up to tune the  
> oscillators.  I tell ya.. it's like functional sabbotage of  
> anything of late here that looks like it stands a chance of getting  
> completed :-).
> Again today when it started up all was fine but then suddenly  
> lights flashed and it reset to patch 1 and was locked up on the  
> buttons. KNOBS STILL READ!  But ...no buttons will respond or LED's.
> I thought possibly it was something thermal at that point but  
> reboot half an hour later proved no change.. so a cold boot does no  
> good.  Hmm.  Anyway..it would be great to see the detailed schemos  
> of that section at this time.  I see every other stitch of  
> information online..except the cpu and panel board pretty much it  
> appears.  Anyone know where they exist in pdf? -Bob