Hello,
Some bad news, I'm afraid.
Yesterday evening everything looked all right and sharp, but at some point the picture went unstable and way out of focus, I could also hear some strange noises coming out the picture tube.
Now the EHT is missing and I can see an abnormal and too small signal in amplitude on the collector of the line output transistor Q1418. Line control looks normal, Q1418 itself doesn't show any shortcut and looks okay on the tester. + 24.4V is present on Q1418.
I looks to me that the line output transformer T1420 is defective, but it's very difficult to reach as far as I can see.
Is there any trick to test this, other then dismantle it ?
Thanks.
Wilfred
Wilfred