LG 42LV5500 - Main Board (Front and Back Side) Component Locations

May 2011 LCD-DV 42LV5500
42LV5500 Main Board (Front and Back Side) Component Layout
58
5V_Normal
Grayed out components are on the back
P901
P1702
P502
IC802
IC803
IC602
EB
C
Q901
P1501
P1502
P1302
E
B
C
Q902
X601
SW1
IC504
IC508
P601 N/C
EB
C
Q1001
D
SG
Q1002
BCM
IC101
IC102
IC804
IC401
IC402
IC1702
L505
Q503
Q508
IC501
IC507
IC506
IC505
IC1203
IC103
IC1204
IC701
1
2
3
2
IC2103
P101
N/C
P102
N/C
P1601
Q501Q502
E
B
C
E
B
C
L1704
L1707
L1708
L1703
X602
IC801
P1702
12.2V
Each Pin
MAIN BOARD
p/n: EBR71850702
p/n: EBR73146501
p/n: EBR71850705
L509
L516
L515
SW1
Microprocessor
Reset
5V_USB
3.3V_
Normal
0.9V FET Switch
0.9V FET Switch
+0.9V_CORE
USB2 EDID
NVRAM
USB1 EDID
CEC
Earphone
Amp
RGB_DD
C_SDA
RGB_DD
C_SCL
NAND
FLASH
HDMI
Selector
+1.26V_TU
1
18
TUNER
18. IF p
17. IF n
16. IF AGC
15. Reset
14. 3.3V
13. 1.26V
12. GND
11. CVBS
10. NC
9. SIF
8. NC
7. SDA
6. SCL
5. NC
4. NC
3. 5V
2. NC
1. NC
TU2101
TUNER
RS232
Microprocessor
EEPROM
+2.5V_BCM35230
+1.5V_DDR
DDR
DDR
Audio Amp
RL_ON Drivers
Power Det (24V)
Power Det (12V)
INV_CTL
Driver
Wireless Dongle Switch
Pin Label STBY Run Diode Check
24
ERROR
n/c n/c OL
23
n/c
n/c n/c OL
22
(1)
PWM 0V 2.35V
21
12V 0V 12V 2.07V
20
n/c n/c n/c OL
19
12V 0V 12V 2.07V
18
DRV-ON 0V 3.26V 1.53V
17
12V 0V 12V 2.07V
16
V_Sync 0V 0V OL
13-15
Gnd Gnd Gnd Gnd
9-12
3.5V 3.55V 3.53V 1.15V
5-8
Gnd Gnd Gnd Gnd
2-4
24V 0V 24.5V OL
1
PWR-ON 0V 3.41V 2.89V
P201 "SMPS Board" To P502 "MAIN Board"
0.2V~3.3V
P901 Connector "MAIN Board" To "IR Board"
Pin Label STBY Run Diode Check
1SCL 2.9V 3.49V 3.28V
2SDA 2.92V 3.49V 3.28V
3Gnd Gnd Gnd Gnd
4KEY 1 3.26V 3.28V 1.88V
5KEY 2 3.26V 3.28V 1.88V
6 3.5V_ST 3.55V 3.49V 1.15V
7Gnd Gnd Gnd Gnd
8 LED_B/BUZZ 0V 0V OL
9IR 1.48V 1.45V OL
10 Gnd Gnd Gnd Gnd
11 +3.3V_Normal 0.35V 3.34V 0.53V
12 LED_R/BUZZ 0V 0V 2.67V
13 Gnd Gnd Gnd Gnd
14 S/T_SCL 3.55V 3.49V 1.86V
15 S/T_SDA 3.55V 3.49V 1.86V
Panel Vcc Switch
Panel Vcc
Drivers
Video
Processor
Audio Mute
EB
C
Q904
IC601
E
B
C
Q906
SG
D
Q507
E
B
C
Q506
EB
C
Q505
D810
C
A1 A2
EB
C
EB
C
Q2105
C
A1
A2
D707
D710
C
A1 A2
C
A1
A2
D708
D711
C
A1 A2
C
A1
A2
D713
Q102
G
S
B
D
G
S
B
D
G
S
B
D
Q101
EB
C
Q801
Q710
Q2104
3
1
2
IC502
3
1
2
IC503
E
B
C
Q504
EB
C
Q1701