RCA TV model 14F512T, ch M123SP with Vertical Deflection Problem

[Brad]

Hi,

I have a RCA TV model 14F512T, ch M123SP (NO Schematic) in my TV service
shop with a vertical deflection problem. I replaced R409 1 ohm which was open
(in -12.6 source) and I replaced the vertical IC "IC301". Note: both +12.6
and -12.6 source (measured at source) are present, but still no vertical
deflection. Horizonal line is abt. 3/4 down from top of screen. When I open
the -12V circuit, in effect removing -12V source, the horizontal line is a
little above the middle. Yoke test revealed yoke is not shorted or open. I
tested several parts around "IC301".

Has anyone repaired this (or similar) model TV with this problem?

Thanks in advance, Brad

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[James Sweet]

Hi,

I have a RCA TV model 14F512T, ch M123SP (NO Schematic) in my TV service
shop with a vertical deflection problem. I replaced R409 1 ohm which was
open
(in -12.6 source) and I replaced the vertical IC "IC301". Note: both
+12.6
and -12.6 source (measured at source) are present, but still no vertical
deflection. Horizonal line is abt. 3/4 down from top of screen. When I
open
the -12V circuit, in effect removing -12V source, the horizontal line is a
little above the middle. Yoke test revealed yoke is not shorted or open.
I
tested several parts around "IC301".

Has anyone repaired this (or similar) model TV with this problem?

Check electrolytic capacitors in the vertical circuit.