I have posted on my site a copy of
TV Servicing, a 45-page booklet published by RCA in 1951:
http://antiqueradio.org/art/RCA_TV_Servicing_1951.pdf
This is not a comprehensive service guide, but a collection of articles, mostly written by John Meagher, author of RCA's
Pict-O-Guide television books and one of my favorite technical writers from that era.
The intro says that these articles appeared in
RCA Service News, a publication I haven't seen before. Is anyone else familiar with it? A quick search didn't turn anything up.
Enjoy!
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html