Sony color KV1354R shorted horizontal output

[radiotvnut]

It could have very well taken out the regulator. About 20 years ago, I was given a 19" Sony from the same time period as yours and it had a shorted HOT. I didn't want to fool with it and I gave it to a friend. He found that the flyback was what took out the HOT and after replacing the flyback and HOT, the set went into shutdown; but, would stay on at lower line voltage. He determined that the combination audio output/voltage regulator IC was bad.

Out of all the sets that I've serviced (all brands), I've found these parts to be common failures. Sometimes, a HOT will blow on it's own; but, more times than not, something caused it to blow and based on my experience, I'd look at the flyback as being the cause.

When replacing the parts, try to stay away from NTE parts and go with the original part numbers, if you can find them.

[zeno]

Pretty sure if it has the big audio / regulator IC the
H out didnt blow. Most the audio failed with crackling.
Also they loved to get cold joints. The FBT was usually the culprit.
Also look at the little disc caps going E-C of the HOT. IIRC
this had the 220pf that shorted often.

Story. I think it was this model. Set came in, bad HOT, FBT, fuse.
Customer said to junk it so I put the chassis in our junk yard.
Another came in a few days later same problems. Put that
chassis on top of the other & happened to look at the serial
tags. CONSECUTIVE !! Called both customers. They both
got there sets at Lechmeres on xmas eve..........
Both ran abt 15 yrs without service & died within days
of each other. Maybe they do put timers in them.

73 Zeno