Daewoo TVZ 1321 Service Manual page 80

Tv/vcr in one board, chassis : cn-140 ntsc-m system
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DESCRIPTION OF PINS
Pin
Function
No.
wave Information
12
H. Vcc
13
AFC FILTER
14
AFC FSP IN
15
32H OSC
X-RAY
16
PROTECT
(cont.)
Voltage and
6.25V
FDP
3.8V
Peripheral circuitry
24k
3k
R
1.35k
300
CSB
500F18
2k
2k
1.2k
2k
3k
78
Circuit description
Power supply pin for
horizontal and vertical
systems. it's current is
about 34mA.
Increasing R provides a
faster AFC response to
minimize picture skew-
ing in the VCR mode.
However this will
increase horizontal jitter
6.25V
in weak signal areas
Flyback pulse is limited
to 4V, to generate the
AFC 2 detector pulse.
Peaks around 4V caus-
4V
es jitter;also the picture
is displaced to the right
due to the integration of
the flyback pulse.
CSB500F18 is used.
300
300
300
Applying voltage of 0.7V
1.2k
or more operates the X-
ray protector. connect to
GND if not using the pin.

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