Read LG 42LP860H (CHASSIS:LD33B) Service Manual online
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.
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.
C3802
0.1uF
C3803
0.1uF
+3.5V_ST
IR_OUT_RS232C
R3814
4.7K
C3801
0.1uF
JK3803
SPG09-DB-009
1
2
3
4
5
6
7
8
9
10
IC3800
MAX3232CDR
EAN41348201
3
C1-
2
V+
4
C2+
1
C1+
6
V-
5
C2-
7
DOUT2
8
RIN2
9
ROUT2
10
DIN2
11
DIN1
12
ROUT1
13
RIN1
14
DOUT1
15
GND
16
VCC
R3811
4.7K
C3800
0.1uF
R3821
100
R3820
100
+3.5V_ST
EXT_12V
RS232_RX
RS232_TX
D3804
20V
20V
OPT
D3805
20V
20V
OPT
L3802
SS_OLD
L3801
SS_OLD
EXT_5V
C3804
0.1uF
JK_DBG_TX
JK_DBG_RX
MTK_DBG_TX
JP3802
DBG_SW
C3814
0.1uF
0.1uF
IC3805
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
ON SEMICONDUCTOR
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
NEC_DBG_TXD
C3818
1000pF
50V
OPT
UART_DBG_SW
EXT_SPK_VOL+
JK_DBG_TX
D3806
5.6V
OPT
IC3808
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
ON SEMICONDUCTOR
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
NEC_DBG_RXD
C3815
0.1uF
0.1uF
+3.5V_ST
IC3806
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
ON SEMICONDUCTOR
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
C3817
0.1uF
0.1uF
+3.5V_ST
+3.5V_ST
JK_DBG_RX
EXT_SPK_VOL-
MTK_DBG_RX
IC3807
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
ON SEMICONDUCTOR
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
C3819
1000pF
50V
OPT
D3807
5.6V
OPT
JP3801
C3816
0.1uF
JK3801
PEJ027-04
EXT_SPK_CONTROL
6B
T_TERMINAL2
7B
B_TERMINAL2
5
T_SPRING
4
R_SPRING
7A
B_TERMINAL1
6A
T_TERMINAL1
3
E_SPRING
C3821
0.1uF
0.1uF
C3820
0.1uF
0.1uF
IC3809
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
ON SEMICONDUCTOR
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
IC3810
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
ON SEMICONDUCTOR
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
+3.5V_ST
EEPROM_SW
SDA_NVRAM
SCL_NVRAM
I2C_SDA5
NEC_EEPROM_SDA
NEC_EEPROM_SCL
I2C_SCL5
+3.5V_ST
D3803
50V
BAP70-02
R3834
1K
1K
R3849
3.6K
R3851
3.6K
R3844
4.7K
R3845
4.7K
+3.5V_ST
+3.5V_ST
+3.3V_NORMAL
+3.3V_NORMAL
IC3812
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
ON SEMICONDUCTOR
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
MTK_DBG_TX
RS232_TX
C3811
0.1uF
0.1uF
+3.5V_ST
UART_SW1
NEC_TX3
C3822
0.1uF
0.1uF
R3866
0
OLD_UART
IC3804
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
ON SEMICONDUCTOR
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
R3867
0
OLD_UART
IC3802
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
ON SEMICONDUCTOR
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
RS232_RX
UART_SW3
NEC_RX3
MTK_DBG_RX
MTK_NEC_TX
R3843
22
C3825
0.1uF
0.1uF
NEW_UART
R3868
0
OLD_UART
R3846
22
C3813
0.1uF
0.1uF
IC3813
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
ON SEMICONDUCTOR
NEW_UART
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
MTK_NEC_RX
IC3814
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
ON SEMICONDUCTOR
NEW_UART
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
R3864
0
OLD_UART
UART_SW2
SOC_RX
+3.5V_ST
C3824
0.1uF
0.1uF
NEW_UART
C3823
0.1uF
0.1uF
+3.5V_ST
NEC_TX0
IC3811
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
ON SEMICONDUCTOR
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
NEC_RX0
SOC_TX
L3801-*1
CB2012PK501T
SAMHWA_NEW
L3802-*1
CB2012PK501T
SAMHWA_NEW
RS232C
38
RS232/UART
2012.12.10
1A@5V /1A@12V FOR COMMERCIAL(RS-232C POWER)
xxLP860H-ZA
EXT_SPK_CONTROL & DBG OUT
CONNECTION
UART DBG SWITCH
B0 - A
EXT.SPK VOL Control
B1 - A
B0 - A
DEBUG_NEC/MTK
Debug MTK
Debug NEC
CONNECTION
B1 - A
L
UART_DBG_SW
L
DBG_SW
H
H
NVRAM I2C SWITCH
B0 - A
NVRAM - NEC
H
L
CONNECTION
NVRAM - MTK
UART_SW2
B1 - A
H
L
H
B1 - A
B0 - A
UART_SW3
B0 - A
CONNECTION
UART_SW2
B1 - A
H
CONNECTION
L
MTK - RS232C ADJ.
RS232C - NEC_UART3,INTERACTIVE
CONNECTION
EXT UART SWITCH
B0 - A
MTK - NEC_UART3,NEC USB D/L
MTK - NEC_URAT0,NORMAL COMM.
B1 - A
MTK - NEC_UART3,NEC USB D/L
L
DBG_SW
MTK - PHONE JK. DEBUG
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