On Jul 7, 10:11*pm, Don wrote:
I have a 25 year old Sony KV-20XBR TV that's been darn near perfect
over a quarter of a century! *Amazing... last week, however, it
decided to die. *Here are the symptoms: 1). Color was obviously off,
so I checked it with a color-dot-bar generator. *It appears the Red is
gone, as the only bars seen are shades of blue and green, and 2).
Later, the picture slowly went to almost black -- you can make out
images, but vaguely.

Although I'm a tech (RF), I have no experience with TV
troubleshooting. *I know the TV is obsolete, but it's in "as new"
condition (not a scratch), and I really hate to take it to the
recyclers. *Any thoughts... do you think it might be in the red drive
circuit, focus circuit, the flyback, or the Trinitron CRT. *If it's
the latter, cost-effective repair is out the window. *I believe this
series of sets had a problem with cold solder joints. *Although I
doubt this is the problem, I thought I'd just mention it.

Thanks,
Don

Hi Don
I was just going to suggest that. Sony's had A LOT of cold solder
problems. Is it vibration sensitive? Are you certain that it's that
old? If it is the chassis I'm thinking of look at the three pin
regulators especially. The first thing I would do is pull the chassis
and resolder anything that looks suspicious. If the AVboard plugs in
fromthe back and swivels down to remove check the connections on both
boards, especially the mother board. Resoldering fixed a lot of them.
Then try it again. You might get lucky. Let me know. Lenny.