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DEFLECTION
HORIZONTAL
PINCUSHION CORRECTION CIRCUIT
This circuitry provides a east/west pincushion correc-
tion by providing a smaller horizontal deflection current
at the upper and lower portions of the flat screen, thru
the dual OP-AMP IC3300 . In addition, the overall hori-
zontal width is adjusted using this circuit.
SHUTDOWN CIRCUIT
This shuthdown circuit operates by means of a sample of
HV taken from pin 3 of the sweep transformer TX3200.
This sample of voltage is rectified, filtered and then com-
pared with a reference voltage (fixed by ZDX3002) by
the transistor QX3001. When the HV reaches the maxi-
mum permitted voltage, the transistor QX3001 enters in
conduction mode; like consequence the transistor QX3002
also enters in conduction too, switching a DC voltage
on pin 32 of IC2200.
When IC2200 receives this DC voltage, the X-ray protec-
tion is activated and the TV set is shutting off.
VERTICAL
The FA chassis uses a 221-01410 on ICX2100, which
contains; On-chip Thermal Protection, Pump-Up Stage
and Power Amplifier. The vertical drives comes from pins
13 & 14 from the video processor IC2200, which are a
negative and positive vertical Ramps. The Output to
the yoke is on PIN 2 of ICX2100 . Dual power supply is
needed for this IC (+/- 14Vdc), Applied on pins 6 & 1
respectively.
SERVICING
SMALL SIGNAL
AUDIO & VIDEO PROCESSING
The FA chassis has a stereo amplifier, IC800 P221-1488,
which is the final audio stage. This chassis does not
have phone output, however it has Matrix Output. The
Matrix output is used to connect a center speaker, in
serial with the two stereo speakers. This feature is used
to connect an additional 8 Ohm 10W speaker.
The stereo amplifier provides an power output of 10W x
2. The IC1400, 221-01127 is the audio processor and
provides the Bass, Treble, Balance, front surround and
soundrite features, this IC is controlled thru the IIC bus.
IC1400
CXA2054S
Comp. Audio In
19
AUX2-R
41
AUX2-
42
VIDEO PROCESSING
The IC2200, P221-01519 or TB1253AN/N is a TV Signal
Processor IC, which contains PIF,SIF, Video, Chroma
and deflection signal processors for NTSC systems. Also,
it has V and EW geometric correction Outputs.
Features
IF Stage.
Inter-carrier input.
Digital AFT
Tank coil less PIF VCO
Adjustment Free
Video Stage
Built-in AV Switch
Video monitor Output for CCD MCU
Built in chroma trap
Black stretcher, DL Aperture Control
Scan Velocity Modulation output.
3-3
IC2900
CXA2089S
RV4
30
28
LV
A/V
SWITC
RV3
24
LV
22
RV2
17
LV
15
AUX1-
R
39
47
AUX1-
L
RV1
40
45
10
LV
8
2
I C
L
L
7
R OUTPUT
R INPUT
6
2
I C
17
IC6000
Hard
REAR
JACK -
Matrix-
Pr
Pb
R
L
Y
V
R
L
SVout
SVin R
L
FRONT
JACK-
SVin
V R
L
IC800
TDA7263
Output
1
10
AUDIO
AMPLIF
5
8
3
Output R
FA - SERVICING
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