The both sets use bonded yokes. The yokes are glued on the CRT
& the convergence / purity rings are often unadjustable.
Purity problems are from:
Unglued yoke.
Trim magnet fell off, they are usually V shaped on RCA.
Something magnetic near by.
If a big magnet got near the auto degauss may not fix it,
manual degauss it.
Degauss circuit not working.
Bad CRT, shadow mask moved.
Its best NOT to touch the neck rings. They wont need adjusting unless
it was messed with.
The most common pin problems with RCA of that vintage were
open caps or the pin diode. Also had a few pin out transistors fail.
BTW with RCA use the chassis number. Its on the tag and or
in the set. Starts CTC###.
73 Zeno
Quote:
Originally Posted by Vintv49
I have two of these, which I purchased this year, one from a thrift and the other from Craigslist. They are both Colortrak 2000's, but different. One is a F27155AK June 1988 Thomson Electronics model with a SCART connector and the rest typically found on the Dimensias(?). It has a pincushion effect. Sound is great with external speakers added.
The other is a FLR2522T October 1985 RCA, which has a purity/convergence problem in the upper right corner(haven't tried to degauss, yet, not sure if that's the problem either). The sound on this unit is really nice, without adding any speakers. I may do that later.
I have read that the pincushion/convergence issue could be a pincushion circuit replacement need(maybe?). Since it rarely but occasionally turns off and comes on again - there are some solder joints that need resoldering, most likely(?).
I enjoy these alot, especially the one with SCART connector. They could both use repair and tune - finding someone in this Atlanta area might be in order, since I am NOT equipped with instruments or the tv repair know-how. Hope you enjoy the photos - everyone's contributions here add to the videokarma.org value. Thank you.
The tvs's are at : https://www.flickr.com/photos/41385747@N02/sets |