.....snip
It seems there are quite a lot of such bulldust merchants around----I remember some allegedly ex-Tektronix guys trying to tell us that the seriously dire Tek 650 series of picture monitors were really "all made by Sony!'.
Funny thing, they all had "Beaverton , Oregon" all over them!
They might have been partially correct. Sony learned a lot from Tek on CRT manufacturing and applied that to the development of the Trinitron CRT. It's possible that those monitors had a Trinitron CRT but were still built in Beaverton.
Here is one of those Tek picture monitors I saw last week but forgot to post, didn't sell at 99 euros, no idea if it's a Sony or not.
https://www.ebay.de/itm/275037647046
Not sure I would want to touch anything Sony TV related from the 1970's, after watching the recent Shango066 video.
David
I wouldn't take
Shango 066 as a guide---like many other "youtubers" he is a legend in his own lunchbox!"
I looked up the video, got about 2m30s into it & gave up, as his diagnosis technique is so painful.
The fault report says "no HT" (presumably they mean "EHT").
A sneaky trick is to turn on the TV, put your forearm close to the screen (the outside part), & if the EHT is coming on, the hairs on your arm will be attracted to the screen.
If they just flick out, then return, you may have a failed Horiz o/p device, but if they stay out, you haven't lost EHT, but have another fault (just one of the tricks you develop after fixing stuff for a living!)
I vaguely remember fixing a similar set with the SG264A, but happily that device was OK.
Most of the Sony stuff I fixed just used ordinary BJTs in that position, & were, if not super easy, reasonably so.
I avoided Philips "K" series stuff, Sharp weren't bad, neither were Sanyo, or National/Panasonic.
One weird thing about Sony is the number of different SMPS they used---Sanyo, on the other hand, kept the same design for decades!
Convergence of a Trinitron is a dream, compared to "Delta gun" tubes!
Unfortunately, the "direness" of the Tek 650 series was in the stuff
they sourced, not the Trinitron tube & accessories---Sony used the same display bits in their BVM1301, which was "reliable as old boots".