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B4
22 Vpp
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3.S SV LINEAR REGULATOR
(Refer to circuit diagram Fig-B)
The 6V regulator is consists of 0207 and error
amplifier 0315b.
The reference voltage (6V) on pin 3 of 0315b is
provided by resistor divider R231 and R232.
The
feedback signal is fed to pin 2 of 0315 via R229.
The output signal is fed to the base of 0207 via R228.
The 6V voltage is derived from the emitter of 0207
and R227-C210.
is an AC design based on a single chip power
amplifier module (TDA-1675A).
Vertical deflection coil is connect to pin 1 of 0301 via
P301.
The ramp generator which is inside the TDA-167SA,
generates ramp signal through a buffer stage to pin 9,
then send to linearity provides adjustable frame
I inearity for product set up purposes. Pin 12 is the
inverting input of the amplifier.
The output of power amplifier from pin 1 of 0301
drives the vertical deflection coil by a negative slope
current ram ply, R309 and C307 are used to stabilize
the power amplifier.
R307 and R310 define the dc level across C309, so
allowing a correct centering of the output voltage.
R308 and C308 in conjunction with R307 and R310,
applied at the feedback input pin 12 of 0301, a small
part of the parabola, available acrossC309, and the
AC feedback voltage, taken across R312.
BV LINEAR REGULATOR
Fig-B
Pin 14 is the main supply voltage (+ 24V) input. Pin 8
OUTPUT
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INPUT
12V
The 5V voltage is derived from 6V via diode D046.
There is a 0.7V voltage drop on the diode, so S.3V
voltage is available after the diode.
3.7 DEFLECTION CIRCUIT
The deflection circuit consists of the mode selection,
horizontal oscillator, horizontal deflection, vertical
deflection, position control, DPC control, dynamic
focus, and X-Ray protection circuit.
3.8 VERTICAL DEFLECTION CIRCUIT
(Refer to circuit diagram Fig-B)
The power amplifier driving the vertical yoke assembly
is the ground pin.
The supply voltage of the power stage is forced at pin
2.
During the trace time the voltage of pin 2 is
obtained from the main supply voltage via 0301; while
during the retrace time pin 2 is supplied from flyback
generator via C302 and pin 15 of
0301.
The vertical SYNC. is applied to pin 5 of 0301 via
R30 1-C30 1.
R341-0303-C304-R302 connected to
pins 3, 4, 6 determine the free-run frequency and pull-
in range of the oscillator inside 0301.
The pull-in
range is from 45Hz to 100Hz.
Pin 9 is the output of the current mirror that charges
the series of C313 and C305.
This pin is also the
input of the buffer stage.
Pin 10 is the output of the buffer stage and it is
internally coupled to the inverting input of the power
amplifier through R 1.
Network R306-R30S-C30S-C313-R311 is connected
between input and output of the buffer stage (pins 9,
10) which determine the linearity of the vertical
deflection with R311 enabling the fine adjustment.
= 3-7 =
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