[sdiy] Very strange divider problem in Solina..

[Bob Weigel]

I thought this would go relatively easy.  It's turning into a hellion.  
This thing had 5 SAJ110's that have bad sounding garbled and or wrong 
frequency outputs. I put a socket in to #4 first and tried swapping in 
chips from a scrap unit here whose condition I'm not certain of but hey 
there are 10 chips so I figured I'll probably have 7 at least that work 
right?  Well..curiously only a couple of them worked in *that* 
location..but they did get rid of that problem initialy.  So I went to 
chip #3 which had just a bad patter of strangeness in a leg gehk gehk 
gehk...ghek ghek..ghek ghek ghek... etc. over the top of the wave form 
or it's resetting or something.  Anyway it doesn't matter what chip I 
put in there..it does the same dang thing.  In fact chips that in the #4 
location had the defect on what pin 11 I think... they all work fine on 
pin 11 in that location but pin 9 is consistently doing this patter.  I 
mean...some of the dividers work fine.  #1, #5 and #8 namely.  The other 
5 had one bad sound or another.  3 wast he least annoying but not good 
still.  :-). 

1) does anyone have a better application diagram for the SAJ110 so I can 
rig a test circuit for these chips?  I did what I thought would work but 
it doesn't seem to.  I mean all you should need is pin 1 to -12V or so 
and pin 7 to ground and a pull down resistor of 18K or like that on the 
output you are testing currently right?

2) anybody seen anything of this nature?  I've worked on a lot of 
divider based machines but..usually I just swap chips when there's 
something funny like that and it's fine.  I also swapped the local 
supply cap after reducing ripple on the front end supply a bit but to no 
avail.  Everything is identical.

-Bob