James Sweet wrote:
Grumps wrote:
Sony KVX2142, ae-1c chassis. Picture is severely squashed
vertically, with bright band in the centre. Preliminary
investigation suggests that the HT is ok (I get a picture), and the
horizontal drive is also ok. The 27V for the vertical deflection
circuitry sits as 12V; there must be some path from the 12V to the
27V. According to the circuits, the FBT generates the 27V supply via a
resistor (0R47), diode, and a elec cap. There would appear to be no
volts either end of the res. This would seem to indicate the FBT is
kapput, but only the secondary that is used for the 27V bit. Is this
possible/likely? Before I splash out £50+ for a replacement, I'm
wondering if I
could make a separate 27V supply.
Comments? Ta




Very unlikely to be a bad flyback, sounds like something is shorted in
the vertical deflection circuit and pulling the supply down.

My mistake. I had not looked under the circuit board, so just assumed which
was the FBT feed to the resistor. I got the wrong end! The 0R47 is open. Q
is, why did it blow?!