Circuit Diagram - LG GU280 Service Manual

7. CIRCUIT DIAGRAM

16 15
L
GSM with FEM
ANTENNA_PAD
ANT102 ANT101
ANTENNA_PAD
RF-800
K SW101
C163 C175 C110 33p
0 15p
G2 2
R110 ANT RF
G1
1n
L101
1
C104 C105
100n
1p 10n 8
10
12
13
23
24
J
L106
VREG_MSMP_2.6V 15n
C122
33p
I
ANT_SEL[0]
ANT_SEL[1]
ANT_SEL[2]
ANT_SEL[3]
H
L116 DNI FL101 B7686
C149 DNI
6 3
WCDMA_1900 ANT TX_IN
1
1 RX_OUT1
C127 8
RX_OUT2
DNI 4
GND1
5 2
2
GND2 GND4
9 7
GND3 GND5
G
WCDMA_1900
1880,1960MHz
C134 2.2p
WLNA_HB1_IN_M
1 L121
DNI
F
2
C138 2.2p
WLNA_HB1_IN_P
B7696
L120 4.7p C144 3.3n FL106
E
1 6 3
WCDMA_2100 ANT TX_IN
2
1
L119 RX_OUT1
8
DNI RX_OUT2
2
GND1
4 7
WCDMA_2100 GND2 GND4
5 9
GND3 GND5
1950 MHz,2140 MHz
C116 1.8n
D
1
WLNA_HB2_IN_M
2
1
L115
1p
2
C142 1.8n
1
WLNA_HB2_IN_P 2
C
FL103 B7671
R111 6.8n C148 8.2p
1 6 3
WCDMA_LB ANT TX_IN
2
1
C160 RX_OUT1
8
12n RX_OUT2
2
GND1
4 7
GND2 GND4
5 9
GND3 GND5
B
836.5 MHz,881.5 MHz
WCDMA_850/900
L108 33p
WLNA_LB_IN_M
L107
10n
A
L109 33p
WLNA_LB_IN_P
16 15
ACPM-5201
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
14 13 12 11 10
C114 2.7n
1
GLNA_HB_IN_P
2
2
L112
L113
DNI
DNI
1
C113 2.7n
1
GLNA_HB_IN_M
2
C174 1n
2
1 PCS_IN_M
FL105
C157 1n
85090019002100
1
17 PCS_IN_P
PCN_RX2 2
16
PCN_RX1
ANT
19
PCS_RX2 L105 33p
18
PCS_RX1 GLNA_LB_IN_P
GND1
15
GND2 GSM850_RX_EGSM_RX2
C162
14
GND3 GSM850_RX_EGSM_RX1 C115
0.5p
GND4 15n
21
GND5 WCDMA_850 WCDMA_1900
22
WCDMA_2100 L104 8.2n
GND6 WCDMA_1900
20 1
GND7 WCDMA_2100 WCDMA_LB GLNA_LB_IN_M
2
11
GSM850_EGSM_TX
9
PCN_PCS_TX
C153
15p
1n
C120
GSM_PA_BAND MODE
LOW GSM
HIGH DCS/PCS
C161
9.1n
2
C112 6p
L103 9p BAND_SELECT
9
GSM_OUT
1
DCS_PCS_IN
11
DCS_PCS_OUT
C102 1.5n 8
L102 27p
GSM_IN
U101
7 3
C111 GND1 TQM7M5012H TX_EN
DNI 12
GND2
4
VBATT
6
NC1 R101
10 5
NC2 VRAMP
2.2K
C152 C121
39p 22n
GU280 Rev 1.0_ECO (Band I + GSM Quad)
0
2 1 PCS_IN_M
C126
DNI C133
+VPWR
2
1 2 2
C173 C147
C151 C158
DNI
330p
2.2u 330p
1
L118 2 1 1
10n
ACPM-5201 U102
11
PGND
10 1
C128 1n VCC2 VCC1
1 9 2
DNI C129 R103 RFOUT RFIN
2 8 3
1
2 ISO VBP
49.9 7 4
1 1
C135 C159 GND VMODE PA_R0
6 5
0 DNI DNI CPL VEN 2
1
2 1 PCS_IN_P C140
C143
C123 2 2
33p 1n
2 1
WCDMA_PA_ON0
2
C139
1n
1
1
L117
DNI
2
+VPWR
2
C146
680p
1
L123 DNI
VCC2 VCC1
6
RFOUT RFIN
7
ISO VBP
1 1 8
GND VMODE
C132 C180 9
CPL VEN
DNI DNI
10
PGND
2 2
11
ACPM-5305 U104
WCDMA_PA_ON1
2
R109
PWR_DET
1 2 1
1 68
C124
0.5p
2
14 13 12 11 10
9 8 7 6
ANTENNA SWITCH MODULE LOGIC
ANT_SEL0 ANT_SEL1 ANT_SEL2 ANT_SEL3
GSM850/EGSM TX 1 1 0 0
PCN/PCS TX 1 0 0 0
WB850/WB900 0 0 1 1
WB 1900 0 1 0 1
WB 2100
0 0 0 1
GSM850 RX 0 0 1 1
EGSM RX 0 1 1 0
PCN RX 0 1 0 0
PCS RX 0 0 0 0
+VPWR
R102 C131 82p
C154 TX_GSM_HB
10u 18
C176
2.7n
3 dB
GSM_PA_BAND
D1048 FL108
GSM_PA_EN
C178 100p C177 100p C101 8.2p
5 1
RFOUT RFIN TX_GSM_LB
7
VC
GSM_SW_MODE
GSM_PA_RAMP
L114
DNI
C103
100p
836.5MHz,25MHz
+VPWR
2
C130
WCDMA_1900
2.2u
1
C181 DNI
WCDMA_1900_TX_OUT
FL104 B9414
C119 1.5n C118 2.7n C117 33p
1 4 1 1
OUT IN WCDMA_2100_TX_OUT
2 G3 G2 G1 2
PA_R1
5 3 2
2
1 1950MHz WCDMA_2100
C150
2 L125 C141 L122
C155 DNI 4.7n 0.5p
DNI
1n 2 1
1
+VPWR
2
C145
680p
1
FL102 B9425
L110 DNI C125 DNI
4 1
OUT IN WCDMA_900_TX_OUT
G3 G2 G1
2 5 3 2
L111 836.5MHz WCDMA_850/900
5 1
L124
4 DNI
PA_R1 DNI
3 1
PA_R0
2
2
2 2
1 C137 C156
DNI DNI
1 1
C136
DNI
9 8 7 6
- 109 -
5 4 3 2 1
TCXO CIRCUIT
VREG_TCXO_2.85V
1n
C107
C106
100n
X101 DSA321SCA
R113 2K 4 3
R104 VDD OUT 19M_XTAL_IN
1 2
TRK_LO_ADJ
VCONT GND
100 19.2MHz
C108
C179
10n
33n
Close to QSC
BLUETOOTH
BTS4025
C172
1u
C166 C165 C164
1u 10p 10p
R112
470K
C5
VREG_MSME_1.8V VDD_IO
B4
SYSRST_B BT_PWR_ON
A5
C171
VDD_DIG
1u F4
PCM_IN BT_PCM_DOUT
E5
PCM_OUT BT_PCM_DIN
B5
PCM_SYNC BT_PCM_SYNC
C1 D5
VDD_ANA PCM_CLK BT_PCM_CLK
F3 E4
VREG_MSMP_2.6V VDD_PA U103 AUX_TXD
C4
BTS4025 HCI_5
E6
HCI_4
D6
C167
L126 HCI_3 UART1_CTS_N
F5
10p
1n HCI_2 UART1_RFR_N
C6
UART1_RX_DATA
HCI_1
F1 F6
RF_BIAS HCI_0 UART1_TX_DATA
C3
MFP_4
D4
MFP_3
E1
RF_TXRX
D3
CLKREQ_OUT
2450MHz
TP
D2D_SLEEP_CLK
ANTENNA_PAD TP101
ANT104 ANT103
C170 100p
ANTENNA_PAD
X102 DSX321G-32M
4 3
L128 L127
DNI DNI 1 2
32MHz
18p 18p
C169 C168
5 4 3 2 1
L
K
J
I
H
G
F
E
D
C
B
A
LGE Internal Use Only