LG 42LV375H Service Manual page 30

RS232C(TVLink)
+3.5V_ST
C1100
0 . 3 3 u F
16V
C1110
IR_OUT_RS232C
0 . 1 u F
16V
C1107
0 . 0 4 7 u F R1100
100
25V
R1101
100
C1108
0 . 3 3 u F
D1100 D1101
16V
30V 30V
C1109
0 . 3 3 u F
16V
R1103
R1102
6.2K
6.2K
EEPROM I2C SWITCH
IC1104
NLASB3157DFT2G
+3.5V_ST
SELECT
6
ON SEMICONDUCTOR
ANALOG SWITCH
VCC
5
C1101
0 . 1 u F
A
4
SCL_EEPROM
EAN38256201
IC1105
NLASB3157DFT2G
SELECT
6
ON SEMICONDUCTOR
ANALOG SWITCH
VCC
5
C1102
0 . 1 u F
A
4
SDA_EEPROM
EAN38256201
Ethernet_HUB EEPROM Switch
ETHUB_SW
OPT
IC1112
NLASB3157DFT2G
+3.5V_ST
SELECT B1
6 1
ON SEMICONDUCTOR
ANALOG SWITCH
VCC GND
5 2
C1119
0 . 1 u F
A B0
OPT 4 3
ETHUB_MDC
EAN38256201
R1114
0
OPT
IC1113
NLASB3157DFT2G
SELECT B1
6 1
ON SEMICONDUCTOR
ANALOG SWITCH
VCC GND
5 2
C1120
0 . 1 u F
A B0
OPT
4 3
ETHUB_MDIO
EAN38256201
R1117
0
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Copyright © 2011 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
10
5
L1100 L1101
9
OPT EXT_12V_9P
4
R1106
0
8
3
L1102
7
EXT_5V_7P
2
OPT
OPT 6
C1111 C1112
220pF
220pF
50V 1
50V
JK1100
SPG09-DB-009
R1110 0
TVLINK_RX
R1111 0
TVLINK_TX
SELECT CONNECTION
L B0 - A EEPROM - NEC
H B1 - A EEPROM - BCM
R1124
B1
0
1
SCL3_3.3V
GND
2
B0
3
NEC_EEPROM_SCL_2
R1125
0
OPT
R1126
B1 0
1
SDA3_3.3V
GND
2
R1129
B0
0
3
NEC_EEPROM_SDA_2
SELECT CONNECTION
L B0 - A RTL8306 - NEC
H B1 - A RTL8306 - BCM
OPT
R1112
0
ETHUB_MDC_BCM
R1113
0
ETHUB_MDC_NEC
OPT
R1115
0
ETHUB_MDIO_BCM
R1116
0
ETHUB_MDIO_NEC
EXT UART SWITCH
BCM_NEC_TX
TVLINK_RX
BCM_NEC_RX
TVLINK_TX
UART DBG SWITCH
SELECT CONNECTION
L B0 - A Debug NEC
H B1 - A Debug BCM
UART_DBG_SW
IC1102
NLASB3157DFT2G
+3.5V_ST
B1 SELECT
1 6
BCM_RX
ON SEMICONDUCTOR
ANALOG SWITCH
GND VCC
2 5
C1113
B0 A 0 . 1 u F
3 4
NEC_RXD_DBG
EAN38256201
IC1103
NLASB3157DFT2G
B1 SELECT
1 6
BCM_TX
ON SEMICONDUCTOR
ANALOG SWITCH
GND VCC
2 5
C1114
0 . 1 u F
B0 A
3 4
EAN38256201
SELECT CONNECTION
L B0 - A I n t e r a c t i v e
H B1 - A USB Download
UART_SW2
IC1108
NLASB3157DFT2G
+3.5V_ST
R1108
0 B1 SELECT
1 6
ON SEMICONDUCTOR
ANALOG SWITCH
GND VCC
2 5
C1103
R1105
0 . 1 u F
B0 A
0
3 4
NEC_RX
EAN38256201
IC1109
NLASB3157DFT2G
R1109
B1 SELECT
0
1 6
ON SEMICONDUCTOR
ANALOG SWITCH
GND VCC
2 5
C1106
R1107
0 . 1 u F
B0 A
0
3 4
NEC_TX
EAN38256201
EXT_SPK_CONTROL & DBG OUT
+3.3V_NORMAL
DBG_SW
IC1110
NLASB3157DFT2G
R1134
3.3K
+3.5V_ST
B1 SELECT
1 6
EXT_VOL+
ON SEMICONDUCTOR
ANALOG SWITCH
GND VCC
2 5
C1115
0 . 1 u F
B0 A
3 4
JK_DBG_TX
EAN38256201
JK_DBG_RX
IC1111
R1123
NLASB3157DFT2G +3.5V_ST
3.3K
B1 SELECT
1 6
EXT_VOL-
ON SEMICONDUCTOR C1116
GND ANALOG SWITCH VCC 0 . 1 u F
2 5
B0 A
3 4
JK_DBG_RX
EAN38256201
SELECT CONNECTION
L B0 - A DEBUG mode
H B1 - A Volum Control
JK1101
PEJ027-01
E_SPRING
3
T_TERMINAL1
6A
B_TERMINAL1
7A
OPT
OPT
C1117
D1102 R_SPRING
1000pF 4
5.6V
50V
T_SPRING
5
B_TERMINAL2
7B
OPT
D1103 T_TERMINAL2
C1118 6B
1000pF 5.6V
50V
OPT
Chameleon(EU_GP2_BCM3556)
xxLV375H-ZA 2 0 1 0 . 1 2 . 2 0
11
UART&Switch
LGE Internal Use Only