Weird problem with Sony KV-20FV12

[old_coot88]

Yeah, hope so too. When it was doin' the original 'cycling' act, there was no perceptible change in the heaters' normal healthy orange glow. A "Lazarus" CRT is real puzzler for sure.

[zeno]

Newer sets do some strange crap. I had a few of this vintage Sony
with a small ( H & V ) & messed up raster. Who would suspect a bad tuner ?
The data line to the tuner would short & none of the IC's such as
the jungle would get the preset data from the E-prom. So you had to
change the tuner / IF & it just cost too much. Odds are it was a
chip in the tuner shorted but probably a SMD & not available.
BTW to trouble shoot just unsolder the CLOCK, DATA & ENABLE
pins at the tuner. If it gives a full raster its the tuner.......

73 Zeno

Originally Posted by old_coot88

Yeah, hope so too. When it was doin' the original 'cycling' act, there was no perceptible change in the heaters' normal healthy orange glow. A "Lazarus" CRT is real puzzler for sure.