LG E700S Service Manual - Page 31

LM1269, MHz I, C RGB Video Amplifier System with OSD & DACs, LM2480, 80V Triple Bias Clamp

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LM1269 110 MHz I2C RGB Video Amplifier System with OSD & DACs 24 13 1 12 Block and Connection Diagram R OSD 1 G OSD 2 B OSD 3 OSD Select 4 R Video 5 G Video 6 B Video 7 Analog GND 8 Vcc 9 VREFREXT 10 SDA 11 SCL 12 R Analog/ Digital R To Other Video Channels OSD Contrast Clamp DC Restore Amp H Blank Hi Z Input Buffer Amp R Contrast Auto Beam Limit Amp OSD Mixer R Gain Output Buffer Amp Register's To internal Block with "R" I2C Interface VREF R DACs DC DACs Offset R 24 H Flyback 23 Clamp 22 ABL 21 VREF OUT 20 R Out 19 G Out 18 B Out 17 Digital GND 16 DAC 1 15 DAC 2 14 DAC 3 13 DAC 4 LM2480 80V Triple Bias Clamp VIN 1 VIN 2 VIN 3 GND VOUT 1 VOUT 2 VOUT 3 VCC Pin Configuration Block Diagram Vcc 18 R IBIAS INPUT R 35k OUTPUT - 31 -

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LM1269
110 MHz I
2
C RGB Video Amplifier System with OSD & DACs
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
R OSD
G OSD
B OSD
R Video
G Video
B Video
OSD
Select
Analog
GND
Vcc
SDA
SCL
V
REF
R
EXT
V
REF
V
REF
OUT
R
R
Analog/
Digital
OSD
Contrast
To Other Video Channels
Clamp DC
Restore Amp
H Blank
H Flyback
Clamp
ABL
R Out
G Out
B Out
Digital
GND
DAC 1
DAC 2
DAC 3
DAC 4
Hi Z Input
Buffer Amp
Contrast
Auto Beam
Limit Amp
OSD
Mixer
Gain
Output
Buffer Amp
DC DACs
Offset
R
R
R
R
Register’s
To internal
Block with "R"
DACs
I
C Interface
2
1
12
13
24
Block and Connection Diagram
LM2480
80V Triple Bias Clamp
V
1
IN
V
1
OUT
V
2
OUT
V
3
OUT
V
CC
V
2
IN
V
GND
3
IN
OUTPUT
INPUT
IBIAS
18 R
35k
R
Vcc
Block Diagram
Pin Configuration