[GreenKeys] 28ASR KBD cleaning - finished

Kevin H. Phillips kh-phillips at 9-5usa.org
Sun Apr 10 16:49:57 EDT 2022


I made a push to finish cleaning the keyboard on the 28ASR I recently 
acquired so it would not drag into next week.  I managed to get it all 
back together which surprised me a little bit.  One thing I would like 
to ask is was/is there some "secret" to getting the keyboard cover back 
on over the keys?  What I ended up doing was slipping it over the red 
keys first.  Then I found a small brass rod which was long enough to go 
across the keyboard.  I used that to keep the QWERTY key row lined up 
until I could get them slipped into the cover.  Then I used needle nose 
pliers to guide each key of the lower rows into place using the key stem.


The keys cleaned up well.  I stumbled upon another unorthodox solution.  
I mentioned that I had used the Fast Wax product to soak the keys to 
remove the accumulated grime.  Some keys still had very slight hints of 
the brown stuff on them.  I tried another automotive product called 
Mothers Mag & Aluminum Polish to see if it would remove the last 
vestiges of the brown stuff.  It worked so well that I went back to each 
key, removed it, then polished with Mothers.  I would use one cloth to 
apply the cream, then rub it, then used a clean cloth to buff it.  I 
would go until the key felt very smooth with the clean cloth.  I will 
let you judge the results for yourself.  It really made the colors of 
the red keys pop out, I though.


Perhaps the best news for me is that this low-level cleaning seems to 
have solved the problem I was having with random LF's being punched on 
the tape.  I don't know if the keyboard cleaning did this or the extra 
oiling I tried to give the punch while I had the typing unit out.  I am 
attaching a photo of the keyboard as it was when I got the machine for 
comparison.


Another question I have is that on the "J" key there is an inverted 
triangle symbol.  The printer does print something there but it is hard 
to distinguish.  Was that symbol for anything in particular?


73


Kevin

W5TTY


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