ATEC-PANDA 2188 - 4. Signal flow Diagram

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4. Signal flow Diagram
This TV set Consist of main chip LA76814 controlled by Sanyo I
2
C bus and CPU LC863232A .
LA76814 is IC dedicated for NTSC, integrated following circuits inside: amplifying and detecting
in intermedium frequency, AFC, demodulating of sound intermedium frequency, brightness delay-line,
filtering and demodulating of color signal, processing of horizontal-vertical small signals.
TDA7056B is used for power amplifier of sound signal.
LA7840 is used for vertical power amplifier.
The detailed signal flow diagram is shown as follows:
Signal block diagram
V IN EXT AUDIO IN
RF AGC
VEDIO OUT EXT V IN
SELECT V OUT
N201 LA76814
SECAM R-
Y
I
N
SECAM B-Y IN
SDA
SCL
RGB_IN
R/G/B/OUT
BAND1
BAND2
N101 CPU
LA8632XXX
SD
A
SCL
R/G/B OUT
H V
TUNER
SAW
CRT PCB
CRT
A I
V I
H IN
H OUT
V IN
N401
LA7840
DY
SCREEN/
FOCUS
EHT
117V
POWER
UNIT
180V
15V
26V
5V
N304
TDA7056B
Signal flow diagram