Main Board (Front And Back Side) Component Layout - LG 55LW5600 Troubleshooting Manual

55LW5600 Main Board (Front and Back Side) Component Layout
P502 "MAIN Board" Connector To P201 "SMPS Board"
Pin Label STBY
1 PWR-ON 0V
2-4 24V 0V
5-8 Gnd Gnd
9-12 3.5V_ST 3.56V
13-15 Gnd Gnd
16 GND/VSYNC n/c
17 12V 0V
18 DRV-ON 0V
19 12V 0V
20 A-DIM n/c
21 12V 0V
22 PDIM-1 0V
23 n/c n/c
24 Err OUT n/c
P901 "MAIN Board" To "IR Board" J1
Pin Label STBY
1 SCL 3.55V
3.55V
2 SDA
3 Gnd Gnd
4 KEY 1 3.33V
5 KEY 2 3.33V
6 3.5V_ST 3.55V
7 Gnd Gnd
8 LED_B/BUZZ 0V
9 IR 1.5V
10 Gnd Gnd
11 +3.3V_Normal 0.0V
12 LED_R/BUZZ 0V
13 Gnd Gnd
14 S/T_SCL 3.55V
15 S/T_SDA 3.55V
Run Diode Check
3.4V 2.79V
25V OL
Gnd Gnd
3.51V 1.15V
Gnd Gnd
n/c OL
12.01V 2.09V
3.24V 1.54V
12.01V 2.09V
n/c OL
12.01V 2.09V
0.2V~3.3V 2.4V
n/c OL
P3501
n/c OL
Run Diode Check
3.48V 3.29V
3.48V 3.29V
Gnd Gnd
3.31V 1.84V
3.31V 1.84V
3.48V 1.15V
Gnd Gnd
0V OL
1.41V OL
Gnd Gnd
3.33V 0.55V
0V 2.68V
Gnd Gnd
3.48V 1.91V
3.48V 1.92
P502 P3503
RL_ON Drivers
E E
C C
B B
Q504
Q502 Q501
3
B
2 IC502 Power Det (24V)
C
1
E
INV_CTL
3 IC503
2
Power Det (12V)
1
L1704
Audio Amp
L1703
IC1702
Amp
Mute
Q1701
C
E B
L1708
1.5V_FRC
P1702
IC5403
L1707
E
C
B
Q5201
G S
Q5202
P3502 D
URSA Reset
DDR IC5301
IC5202
IC401
DDR
IC5201
SPI Flash
FRC
IC402 DDR
X5201
Q505 B E
24MHz IC508
C
IC5401
Q506 B 1.5V_DDR
C
E
1.26V_FRC
G
S IC504
Q507 2.5V_BCM35230
D
Panel Vcc Switch
P601 N/C
X601
MICRO
10Mhz
IC602
EEPROM
P901
C Q904
D
E B
C
32.78K X602 G
E
C
Q1001
B E
C
B
Q901
Q906
B E SW1 Wireless Power SW
B
Q902
E C
RS232 SW1
Microprocessor
Reset
IC803
P1302
IC802
IC801
PC EDID
D810
C
PC Data
A1 A2
67
Debug
SW5201
n/c
Debug
P5201
P102
0.9V_Core SW
3.3V_
L505
Q503
Normal
IC501
IC505
0.9V_CORE
Q508
0.9V_Core SW
IC5402
NAND
3.3V_FRC FLASH
X101
IC102
45Mhz
BCM
RGB_DDC_SCL
IC101
G B
Q102
D S
D G
Q101
S B
Video RGB_DDC_SDA
Processor
Q801
IC804
B E
C
Earphone
Amp
MAIN BOARD
p/n: EBR72717002 AUSYLHR
Q1002
p/n: EBR73145701 AUSYLJR
S
p/n: EBR72717004 AUSYLUR
p/n: EBT61398007 AUSYLUR
18. IF p
18
17. IF n
16. IF AGC
15. Reset
14. 3.3V
13. 1.26V
12. GND
TU2101
11. CVBS
10. NC
TUNER
9. SIF
8. NC
7. SDA
6. SCL
5. NC
4. NC
3. 5V
1
2. NC
1. NC
July 2011
P101
N/C
5V_Normal
IC507
IC506
5V_USB
USB2 EDID
IC1203
IC103
NVRAM
IC1204
Q710
CEC
USB1 EDID
G B
D S
IC701
A1 C
A2
HP
D713
Mute
D711
C
HDMI
A1 A2
Selector
D708
A1
C
A2
TU_CVSB
D710
Q2105
C
B E
A1 A2
3 1
C
2
IC2103
B E
C 2
Q2104
1.26V_TU
TU_SIF
A1
C
A2
D707
LCD-DV 55LW5600