LG 42LV5500 Training Presentation page 58

42LV5500 Main Board (Front and Back Side) Component Layout
P201 "SMPS Board" To P502 "MAIN Board"
Pin Label STBY Run
n/c n/c
24 ERROR
n/c
23 n/c n/c
PWM 0V 0.2V~3.3V
22
(1)
21 12V 0V 12V
n/c n/c n/c
20
19 12V 0V 12V
18 DRV-ON 0V 3.26V
12V 0V 12V
17
16 V_Sync 0V 0V
Gnd Gnd Gnd
13-15
9-12 3.5V 3.55V 3.53V
Gnd Gnd Gnd
5-8
2-4 24V 0V 24.5V
1 PWR-ON 0V 3.41V
P901 Connector "MAIN Board" To "IR Board"
Pin Label STBY Run
1 SCL 2.9V 3.49V
2 SDA 2.92V 3.49V
3 Gnd Gnd Gnd
4 KEY 1 3.26V 3.28V
5 KEY 2 3.26V 3.28V
6 3.5V_ST 3.55V 3.49V
7 Gnd Gnd Gnd
8 LED_B/BUZZ 0V 0V
9 IR 1.48V 1.45V
10 Gnd Gnd Gnd
11 +3.3V_Normal 0.35V 3.34V
12 LED_R/BUZZ 0V 0V
13 Gnd Gnd Gnd
14 S/T_SCL 3.55V 3.49V
15 S/T_SDA 3.55V 3.49V
P502
Q504
B
Diode Check C
E
INV_CTL
OL
Driver
OL
2.35V
2.07V
OL
P1702
2.07V
1.53V
2.07V
OL
P1502
Gnd
1.15V
Gnd
P1501
OL
2.89V
Q505
B
C
Diode Check
Panel Vcc Switch
3.28V
3.28V
Microprocessor
IC602
Gnd
1.88V Q904
C
E B
1.88V
E
B
P901
1.15V
Gnd
OL
OL
P1302
Gnd
0.53V
2.67V
Gnd
1.86V
1.86V
RL_ON Drivers
E E
C C
B B
Q502 Q501
Power Det (24V)
3 IC502
2
1
P102
3 Power Det (12V)
2 IC503
1
Q1701
L1704
C
Audio Mute
L1703
E B +0.9V_CORE
IC1702
Audio Amp
L1708
L1707
MAIN BOARD
P1702
12.2V
Each Pin
IC401
DDR
IC402 DDR
Panel Vcc
E
IC508
Drivers
C
B +1.5V_DDR
Q506
E
G S
Q507
+2.5V_BCM35230
D
IC504
EEPROM
P601 N/C
X601
IC601
D
Q1002
Q906
C
G S
X602
C
B E
C Q1001
Q901
B E SW1 Grayed out components are on the back
B
Q902
C
E
SW1
RS232
Microprocessor
Reset
IC803
IC801 IC802
C
D810
A1 A2
58
P1601
0.9V FET Switch
3.3V_
N/C
L505
Q503
Normal
IC505
IC501
Q508
0.9V FET Switch
L509
USB2 EDID
NAND
FLASH
IC102
BCM
NVRAM
RGB_DD Q102
IC101
C_SCL
G B
IC1204
D S
D G
RGB_DD
S B
Q101
Video
C_SDA
USB1 EDID
Processor
Earphone
IC804
Amp
B E
Q801
C
HDMI
Selector
p/n: EBR71850702
p/n: EBR73146501
p/n: EBR71850705
Wireless Dongle Switch
18
B E
Q2105
TU2101 C
B E
Q2104
TUNER
C
+1.26V_TU
1
May 2011
P101
N/C
5V_Normal
IC507
L516
IC506
L515
5V_USB
IC1203
IC103
Q710
CEC
G B
IC701
D S
A1 C
A2
D713
TUNER
D711
18. IF p
C
17. IF n
A1 A2
16. IF AGC
15. Reset
14. 3.3V
D708
13. 1.26V
A1
C
12. GND
A2
11. CVBS
10. NC
9. SIF
D710
C 8. NC
3 1
A1 A2
7. SDA
2
IC2103
6. SCL
2
5. NC
D707
4. NC
A1
C
3. 5V
A2
2. NC
1. NC
LCD-DV 42LV5500