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RS232C
L3801-*1
CB2012PK501T
SAMHWA_NEW
IR_OUT_RS232C
+3.5V_ST
IC3800
MAX3232CDR
C3800
0.1uF
C1+
VCC
1
16
C3804
C3801
0.1uF
V+
GND
0.1uF
D3804
2
15
20V
OPT
C1-
DOUT1
3
14
C3802
0.1uF
C2+
RIN1
4
13
C2-
ROUT1
5
12
+3.5V_ST
C3803
0.1uF
V-
DIN1
6
11
DOUT2
DIN2
R3811
7
10
4.7K
RIN2
ROUT2
8
9
EAN41348201
NVRAM I2C SWITCH
UART_SW2
CONNECTION
L
B0 - A
NVRAM - NEC
H
B1 - A
NVRAM - MTK
EEPROM_SW
+3.5V_ST
SCL_NVRAM
C3821
0.1uF
SDA_NVRAM
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 © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
1A@5V /1A@12V FOR COMMERCIAL(RS-232C POWER)
EXT_12V
EXT_5V
10
5
L3801
9
SS_OLD
4
8
R3820
100
3
L3802
7
SS_OLD
R3821
100
2
L3802-*1
CB2012PK501T
6
D3805
20V
1
OPT
SAMHWA_NEW
+3.5V_ST
SPG09-DB-009
JK3803
R3834
50V
1K
BAP70-02
D3803
R3814
4.7K
RS232_RX
RS232_TX
IC3809
NLASB3157DFT2G
SELECT
B1
6
1
I2C_SCL5
ON SEMICONDUCTOR
ANALOG SWITCH
VCC
GND
5
2
C3820
0.1uF
A
B0
4
3
NEC_EEPROM_SCL
EAN38256201
IC3810
NLASB3157DFT2G
SELECT
B1
6
1
I2C_SDA5
ON SEMICONDUCTOR
ANALOG SWITCH
VCC
GND
5
2
A
B0
4
3
NEC_EEPROM_SDA
EAN38256201
EXT UART SWITCH
DBG_SW
CONNECTION
MTK - RS232C ADJ.
L
B0 - A
MTK - PHONE JK. DEBUG
H
B1 - A
UART_SW1
IC3811
NLASB3157DFT2G
+3.5V_ST
SELECT
B1
6
1
MTK_DBG_TX
ON SEMICONDUCTOR
ANALOG SWITCH
VCC
GND
5
2
C3822
0.1uF
A
B0
4
3
SOC_TX
EAN38256201
IC3812
NLASB3157DFT2G
SELECT
B1
6
1
MTK_DBG_RX
ON SEMICONDUCTOR
ANALOG SWITCH
VCC
GND
5
2
C3823
0.1uF
A
B0
4
3
SOC_RX
EAN38256201
UART DBG SWITCH
UART_DBG_SW
CONNECTION
L
B0 - A
Debug NEC
H
B1 - A
Debug MTK
+3.5V_ST
IC3805
R3844
NLASB3157DFT2G
4.7K
B1
SELECT
1
6
MTK_DBG_TX
ON SEMICONDUCTOR
GND
ANALOG SWITCH
VCC
2
5
C3814
0.1uF
B0
A
3
4
NEC_DBG_TXD
EAN38256201
+3.5V_ST
IC3807
R3845
NLASB3157DFT2G
4.7K
B1
SELECT
1
6
MTK_DBG_RX
ON SEMICONDUCTOR
GND
ANALOG SWITCH
VCC
2
5
C3815
0.1uF
B0
A
3
4
NEC_DBG_RXD
EAN38256201
UART_SW2
CONNECTION
RS232C - NEC_UART3,INTERACTIVE
L
B0 - A
MTK - NEC_UART3,NEC USB D/L
H
B1 - A
UART_SW2
IC3802
NLASB3157DFT2G
+3.5V_ST
B1
SELECT
1
6
ON SEMICONDUCTOR
ANALOG SWITCH
GND
VCC
2
5
C3811
R3843
0.1uF
B0
A
22
3
4
NEC_TX3
EAN38256201
RS232_TX
IC3804
NLASB3157DFT2G
B1
SELECT
1
6
ON SEMICONDUCTOR
ANALOG SWITCH
GND
VCC
2
5
C3813
R3846
0.1uF
B0
A
22
3
4
NEC_RX3
EAN38256201
RS232_RX
EXT_SPK_CONTROL & DBG OUT
+3.3V_NORMAL
IC3806
NLASB3157DFT2G
R3849
+3.5V_ST
UART_DBG_SW
3.6K
B1
SELECT
1
6
EXT_SPK_VOL+
ON SEMICONDUCTOR
+3.5V_ST
GND
ANALOG SWITCH
VCC
2
5
B0
A
3
4
JK_DBG_TX
EAN38256201
JK_DBG_TX
+3.3V_NORMAL
IC3808
R3851
NLASB3157DFT2G
3.6K
B1
SELECT
1
6
EXT_SPK_VOL-
ON SEMICONDUCTOR
ANALOG SWITCH
GND
VCC
2
5
B0
A
3
4
JK_DBG_RX
JK_DBG_RX
EAN38256201
UART_SW3
CONNECTION
MTK - NEC_URAT0,NORMAL COMM.
L
B0 - A
MTK - NEC_UART3,NEC USB D/L
H
B1 - A
IC3813
UART_SW3
NLASB3157DFT2G
+3.5V_ST
B1
SELECT
1
6
ON SEMICONDUCTOR
ANALOG SWITCH
R3864
GND
VCC
2
5
0
NEW_UART
C3824
NEW_UART
OLD_UART
0.1uF
B0
A
3
4
NEC_TX0
MTK_NEC_RX
EAN38256201
R3866
0
OLD_UART
IC3814
NLASB3157DFT2G
B1
SELECT
1
6
ON SEMICONDUCTOR
ANALOG SWITCH
GND
VCC
R3867
2
5
NEW_UART
0
C3825
NEW_UART
OLD_UART
0.1uF
B0
A
3
4
NEC_RX0
MTK_NEC_TX
EAN38256201
R3868
0
OLD_UART
DBG_SW
CONNECTION
L
B0 - A
DEBUG_NEC/MTK
DBG_SW
H
B1 - A
EXT.SPK VOL Control
C3816
0.1uF
JK3801
PEJ027-04
E_SPRING
3
T_TERMINAL1
6A
+3.5V_ST
B_TERMINAL1
7A
OPT
OPT
C3818
D3806
R_SPRING
4
1000pF
C3817
5.6V
50V
0.1uF
T_SPRING
5
B_TERMINAL2
7B
OPT
D3807
T_TERMINAL2
C3819
6B
1000pF
5.6V
50V
OPT
EXT_SPK_CONTROL
2012.12.10
xxLP860H-ZA
RS232/UART
38
LGE Internal Use Only
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