Circuit Diagram - LG D686 Service Manual

6. CIRCUIT DIAGRAM

RF_MAIN
MAIN_ANT
SW101
2
G1
3
C110 2.2n 100p L109
G2
4 1
G3 ANT
ENWY0005601
L107
0.5p
PA_EN
Mode ANT_SEL0 ANT_SEL1 ANT_SEL2
Stand-by 0 0 0
TRX1 0 1 0
G1800
TRX2 0 1 1
TRX_B2_G1900
TRX_B8_G900_RX TRX3 0 1 0
NA TRX4 0 1 1
TRX_B1
TRX5 0 0 1
TRX_B5_G850_RX TRX6 0 0 0
TX_DCS_PCS TX_HB 1 0 1
TX_GSM850_GSM900 TX_LB 1 0 0
WCDMA
B5 TRx / G850 Rx
L121 6p
TRX_B5_G850
L122
18n
C150 5.6n
B1 TRx
C160 8.2p
TRX_B1
C163
L128
DNI 2.7n
B8 TRx / G900 Rx
L132 3.9n
TRX_B8_G900
DNI
C173
B2 TRx / G1900 Rx
C137 100p
TRX_B2_G1900
2.2n
DNI
C139
LGE Internal Use Only
Tx Module
SW102 TRX_B1
L104 2.2n
2
ANT COMMON
1
G3 G4
3 4
C111
L108
0.5p 44
100n
PGND16
43
PGND15
42
PGND14
1 41
GND1 PGND13
2
GND2
3
GND3
4
GND4
5 22
GND5 TRX4
6 21
GND6 TRX3
U102
7 20
GND7 TRX2
8 19
GND8 TRX1
18
0
VRAMP
17
0 TXEN
29 16
PGND1 MODE
0
30 15
PGND2 GND9
31
1
PGND3
32
PGND4
1
33
PGND5
34 40
0
PGND6 PGND12
39
PGND11
1
38
PGND10
1
1
C122 100p C176 100p
TX_DCS_PCS
C125
VBATT
DNI
C126 C127 C128
6.8p 1n 22u
C129 100p C177 100p
TX_GSM850_GSM900
R103
C130
R104
DNI
R105
C148 2.7n
RX_B5_G850_INN
L119
FL103
L120
DNI
33n
6 1
ANT RX1 C149 2.7n
8
RX_B5_G850_INP
RX2
C151 1.8n
3
TX
2
GND1
4 9
GND2 GND5
5 7 L123
L124
GND3 GND4
DNI 1p
881.5MHz
C155 6.8p
RX_B1_INN
FL105 L125 L126
4.7n
DNI
6 1
ANT RX1
C162 6.8p
8
RX2 RX_B1_INP
C164 33p
3
TX
2
GND1
4 9
GND2 GND5
5 7
GND3 GND4
L129 8.2n
2140MHz
C166
8.2n
+3V4_VWPAM_MTK
C171 100p
RX_B8_G900_INN
L130 L131
FL106
DNI 33n
6 1
ANT RX1 C172 100p
8
RX2 RX_B8_G900_INP
L134 15p
3
TX
L133 2
GND1
6.8n 4 9
GND2 GND5
5 7 22n 18n
GND3 GND4
C174 C175
942.5MHz
C131 100p
RX_B2_G1900_INN
L115
22n
FL102
6 1
ANT RX1 C138 100p
RX_B2_G1900_INP
8
RX2
C140 12p
3
L117 TX
2
GND1
4 9
GND2 GND5
5 7
L118
GND3 GND4
C141
0.5p
5.6n
C115 100p
TRX_B5_G850
C117 100p
TRX_B8_G900
C113 100p
TRX_B2_G1900
L112
L110 L113
12n 12n DNI
L101 1.2n
RX_G1800_INP
RX_B5_G850_INN
2 3
RX_B5_G850_INP
FL101
L103 10p 1 G1 O1 L102
IN
G2 O2 8.2n
5 4
L106 1.2n
1842.5MHz
L105
RX_G1800_INN
5.6n RX_B8_G900_INN
RX_B8_G900_INP
RX_B2_G1900_INN
RX_B2_G1900_INP
R101 1K
GSM_PA_RAMP
GSM_PA_EN RX_G1800_INN
R102 1K RX_G1800_INP
C120 C121
39p 39p
1K
ANT_SEL0
1K
ANT_SEL1
1K
ANT_SEL2
+3V4_VWPAM_MTK
C135
0.1u
VBATT
U103
14 1
RFOUT_LB VEN_LB PA_ON_B5_EN
13 2
GND2 RFIN_LB 3GTX_B5
12 3
VCC VBATT
11 4
RFOUT_HB RFIN_HB
10 5
CPL_IN NC
9 6
GND1 VMODE PA_R0
8 7
CPL_OUT VEN_HB PA_ON_B1_EN
C145 C146 C144
100p 100p 100p
2
2
C134 C154
22p
2.2u
1
1
U104 VBATT
14 1
RFOUT_LB VEN_LB PA_ON_B8_EN
13 2
GND2 RFIN_LB
12 3
VCC VBATT
11 4
RFOUT_HB RFIN_HB
10 5
CPL_IN NC
9 6
GND1 VMODE PA_R0
8 7
CPL_OUT VEN_HB PA_ON_B2_EN
C156 C167 C169 C168
100p
2.2u 100p 100p
R108 R109
PDET
27 27
R110
36
- 152 -
C101 10p
C102 10p
C104 10p
C107 10p
U2
LNA1N
V3
LNA1P
A2 C112 1n
REFCLK1
U4 B3
LNA2N REFCLK2
V5 A4
LNA2P REFCLK3
U6 B5
RX_B1_INN
LNA3N VDDXO
V7
RX_B1_INP LNA3P
A6
NC4
U8
LNA4N
V9 B7
LNA4P XO2
U101 A8
XO1/REFIN
U10 B9
LNA5N VTUNE
V11
LNA5P
A10
CLK_MODE
U12 B11 C119
LNA6N VSUP2b
V13
LNA6P
A12
GND1
U14
LNA7N
V15 B13
LNA7P PDET
V17 B17
LNA8N TX_IN
U16 C18
LNA8P TX_IP
D17
TX_QN
E18
TX_QP
C123 C124
1u 1u
+2V8_VTCXO_MTK
+2V8_VTCXO_MTK
R106
39K
RF_TEMP_ADC AFC
L136 2.2n
3GTX_B1
PT101 R107
C142 C143
100K 215K
C180 C181
DNI 0.1u
DNI DNI
TX_SPDT
C152 100p
3GTX_B5 6
C182
5
DNI
4
FL104
3
GND PORT2
900MHz
C161 2.7n
3GTX_B8
3GTX_B8
L135 1.5n
3GTX_B2
C183 ANT_BAND_SEL2
Logic Check
C178 C179 DNI
DNI DNI
C165
100p
ANT_BAND_SEL1 ANT_BAND_SEL2
3GTX_B5 1 0
3GTX_B8 0 1
6. CIRCUIT DIAGRAM
SYSCLK
+2V8_VTCXO_MTK
C114 1n
MAIN_CLK_26MHz
C118
0.1u
1u
PDET
GSM_UMTSTX_IN
GSM_UMTSTX_IP
GSM_UMTSTX_QN
GSM_UMTSTX_QP
X101
1XXA26000FTA
4 3
VCC OUT MAIN_CLK_26MHz
1 2
VCONT GND
26MHz
2
ANT_BAND_SEL1
1
C153
100p
C157 100p
3GTX_B5_B8
C159
L127
DNI
15n
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