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Deflection Block
There are several sections to a TV's main horizontal and vertical Deflec-
tion stage:
Deflection Sections
Name
Sections
Horizontal
Y/C Jungle
Output
Drive
Output
Pincushion
Y/C Jungle (E/W =
east/west) Pincushion
Amp
High Voltage
Horiz. Output
Flyback Transformer
(FBT)
Horiz (HP)
Horiz Output
AFC /
Resistive Voltage
Protection
Dividers, Transistors
Jungle IC
Micro
ABL
FBT
Vertical
Jungle IC
Vertical Output
Purpose
Horiz. oscillator.
Horiz. amplifier.
Horiz. amplifier to drive the horizontal
deflection yoke.
Hourglass shaped pictures occur in
o
yoke deflection angles 100
or more.
This stage increases width at left and
right sides to compensate.
Makes primary drive signal.
Develops picture tube accelerating high
voltage.
Makes remainder of tube and vertical
output voltages.
Compares huge horiz output pulses
(HP) and video sync for AFC lock of H.
oscillator.
Excessive B+ current or FBT voltages
are detected by the Jungle IC. Data
transmitted to the Micro will shut OFF
the TV.
Limits picture brightness by using tube
current to reduce RGB drive.
Vertical Oscillator.
Vertical Amplifier to drive the
deflection yoke.
83
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