Service Manuals, User Guides, Schematic Diagrams or docs for : LG TV LP-XG1 066eblk
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BLOCK DIAGRAM
1. Power Block Diagram
220V
AC
NORMAL COMMON 15.5V
THEMOSTAT FILTER FILTER RECTIFIER BALLAST
LINE FILTER 12V
ANALOG
5V
FLYBACK TRANSFORMER
DIGITAL
17V OUT FILTER 5V
SNUBBER 1
N1
12
2 N 6 11
3 N7 N 5 10 15V OUT FILTER ST/BY
5V
CONTROLLER N49 6V OUT FILTER
5 8
TOP225Y N2 N3 7 FAN
6 6V OUT FILTER 12V
PRIMARY SECONDARY
OPTO
UVLO BIAS Ref. / Soft Start
COUPLER COLTROL
- 1 -
2. Digital Block Diagram
CVBS Y Y
Video 8 8 Video
Y,C C VRAM C
Decoder Processor
(SDA9255) 4 R,G,B
(VPC3215) 4 (DDP3310)
H,V H,V H,V
Memory
(SDRAM)
SCL SCL SCL Black Clamp
SDA SDA SDA Ref. Adjust
R,G,B
Video R,G,B R,G,B
R,G,B R,G,B DAC
H,V Controller ADC 24
PC Input R,G,B 48 (AD9708)
Select (TDA4885) (AD9483)
IN1 Input
R,G,B 65MHz V_MUTE3
(BA7657) SCL S/D Scaler
H,V
Select SDA H,V
Clamp ADCCLK DS (MX88281)
R,G,B (BA7657)
H,V Hsync CLK
PC G Sync
Vsync
Clock OSD
IN2 AV/PC H,V Processor Generator H,V
(M52347) (ICS1523) 14.318MHz
PC_SEL
88281_CS
- 2 -
OP
R,G,B AMP EEPROM 88281_SDI OSD_SCL LCD Driver
PC_SEL 88281_SCLK OSD_SDA
PC (AD8023) (24LC04) Hsync AV/PC Board
Vsync SCL S/D V(Ouptut) V_MUTE3
OUT SDA
H,V Buffer EEPROM_SCL
EEPROM_SDA
(74HC04)
SCL,SDA
DDC_SCL SCLK,SDATA
DDC_SDA MICOM
EEPROM 2453_CS,3106_CS
(24LC21) A-MUTE
CLK VCOM
F/F_CLR MODE_Ch DATA IR IR
CS
Hsync
FAN1 OP_LED1 KEY_IN0
Reset FAN2 OP_LED2 KEY_IN1
88281_CLK TEMP1 TEMP_LED1 KEY_IN2
TEMP2 TEMP_LED2 KEY_OUT0
V_MUTE1 CASE LAMP_LED1 KEY_OUT1
FAN_O IR1 IR2 BAL_DET LAMP_LED2 KEY_OUT2
PWR
LAMP
3. LCD DRIVER Block Diagram
PSIG/VCOM
R
R/G/B(1Vp-p) SAMPLE & HOLD
AL023BLM
LEFT RIGHT
R/G/B DRIVER G (CXA2112R) R1~6
1.5W 1.5W
(R) 13.5V/20mA
(CXA2111R) B 5V / 42mA 15.5V / 52mA
R- CLK / CLK- XRGT
15.5V / 6mA
IIC BUS 5V / 180mA
SAMPLE & HOLD
POS1 R7~12
POS2 (CXA2112R)
L+ L- R+ R- DLYC
INVC
PSIG
SOUT / V33
CLP PRG VCOM
SAMPLE & HOLD
3W+3W SOUND
G1~6
AMPLIFIER (CXA2112R)
AL023BLM
TIMING
(TDA7057Q) GENERATOR
(G)
FRP CLK / CLK- RGT
G-
(CXD2453Q) ENB
- 3 -
12V / 1A SAMPLE & HOLD
G7~12
3.3V / 40mA
(CXA2112R)
L R CLOCK PSIG
(TTL)
65M
SDAT/SCLK/
V VCOM
TGCS
H SAMPLE & HOLD
STEREO B1~6
(CXA2112R)
AL023BLM
PROCESSOR
PLL
(B)
(TEA6320T) CLK / CLK- XRGT
(CXA3106Q) B-
9V / 30mA
CLOCK SAMPLE & HOLD
(PECL)
5V / 150mA
(CXA2112R)
65M B7~12
MUTE
L1 / R1
L2 / R2
L3 / R3
IIC BUS
H SDAT/SCLK/
PLLCS
RGT/XRGT/HST/HCK1/HCK2/BLK/ENB/VCK/VST
PC SOUND DWN/HB/VB
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