[GreenKeys] KSR33 fixed! Problem and Solution notes

Tue Aug 25 00:53:23 EDT 2015

excellent!  I  am saving this in case I hit some of these  problems  when I 
 go though the  32 and he 33s
(waiting to do  them all at  once)   Ed#

In a message dated 8/24/2015 9:31:43 P.M. US Mountain Standard Time,  
pj at pjbennett.com writes:

I finally got my KSR33 working (in local mode, next is to  try line mode) 
with the help of Wayne and Dave.  I just wanted to say  thanks again for all 
the help from both of them, especially Wayne who sent  multiple emails 
explaining the mechanical workings and what I should be  looking for. 
As a recap:  I have two units, an ASR33 and a  KSR33.  The KSR was 
chattering in line mode for some reason.  The  solution was multiple things.  Each 
one fixed moved us down the road only  to find yet another problem.  Here are 
the things fixed: 
1.        Initial reason for chattering in line mode was that the selector  
magnet wasn’t energizing.  The fault was in the big flat green resistor  in 
the UCC.  It read open circuit on the 1450 ohm and 2k ohm tabs (the  750 
ohm tabs were fine).  I was able to use the green resistor from my  working 
ASR33 to continue to debug the KSR. 
2.        Once the selector magnet was fixed there was still  chattering.  
This was now due to the selector trip lever (hook shaped  part that catches 
the clutch) not catching properly due to being out of  adjustment.  
Adjusting this fixed the chattering. 
3.        During testing I was using the clothes pin method to force the  
armature over.  Be careful!  I popped the armature return spring  loose when 
pulling out the clothes pin (actually using a plastic part which  probably 
contributed to this happening).  I was quite depressed when  after getting 
the chattering to stop then all of a sudden I couldn’t type at  all!  The 
popped spring was the problem. 
4.        Finally back to typing and the carriage wouldn’t advance forward  
properly.  Using the maintenance lever for carriage return did return the  
carriage, but it never reset so that the carriage could properly advance one 
 character at a time.  Turned out that the problem was the dashpot was so  
dirty inside that it wouldn’t allow the carriage to move all the way into 
full  return, therefor not resetting the carriage return lever.  Again, thanks 
 to Wayne for pointing me in the right direction on this problem (which I 
was  making out to be more difficult than it was and looking for all sorts of 
bent  bars or missing springs).  Cleaning out the dashpot and adding a bit 
of  oil fixed this issue.  And that was the last one! 
I would have never found all these problems without the  help from Dave and 
Wayne, or at least I would have given up sooner.  Just  having someone help 
you makes you a bit more accountable to actually try to  find the problem 
and get it fixed.  Thanks again guys, I really  appreciate it. 
I hope this list of problems and fixes I found in my KSR33  helps someone 
else with similar problems. 
Thanks, 
PJ 
_____________________________________ 
PJ  Bennett, BSEE 
918.704.7055  | _pj at pjbennett.com_ (mailto:pj at pjbennett.com)  |  
pjbennett.com 

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