Circuit Diagram - LG U990 Service Manual

7. CIRCUIT DIAGRAM

1 1 2 2 3 3
KMS-518
SW100
ANT100 ANT101 ANT102 L100 L101
C101 120p
0 4.7nH
C102 C104 L102
NA
A A
1.2p
12nH
FL100
PQ
5 10
ANT_SEL0 VC1 ANT
4
ANT_SEL1 VC2
3 6
ANT_SEL2 VC3 VDD
7
NC
1
GND1
C113 C115 2 8
47p GND2 UMTS_TX_RX
47p 9 13
GND3 DCS_PCS_TX
11 16
C114 GND4 EGSM_TX
47p 12
GND5
14 19
GND6 DCS_RX2
15 20
GND7 DCS_RX1
17 21
GND8 PCS_RX2
18 22
GND9 PCS_RX1
25 23
B B
PGND1 EGSM_RX2
26 24
PGND2 EGSM_RX1
LSHS-M090UH
C C
ANTENNA SWITCH MODULE LOGIC
ANT_SEL0 ANT_SEL1 ANT_SEL2
GSM 850/GSM 900 TX HIGH HIGH LOW
GSM 1800/GSM 1900 TX HIGH LOW LOW
GSM 850 RX LOW LOW LOW
LOW
GSM 900 RX LOW HIGH
HIGH
GSM 1800 RX LOW HIGH
HIGH
D D GSM 1900 RX LOW LOW
WCDMA LOW
HIGH HIGH
GSM
E E
WCDMA
F F
2.2nH
L121
FL103
SAYZY1G95EB0B00
G G
C167
C168
RX_WCDMA_2100
56p
56p
L125
1.2nH
PQ
H H
1 1 2 2 3 3
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4 4 5 5 6 6
L103 5.6nH
VREG_RF_SMPS
DCS L104
15nH
C109
47p L105 5.6nH
L106 5.6nH
L107
PCS
15nH
L108 5.6nH
L109 22nH
GSM L110
22nH
L111 22nH
14 1
GND6 DCS_PCS_IN
13 2
GND5 BS GSM_PA_BAND
12 3
VCC TX_EN GSM_PA_EN
U101
11 TQM7M5003 4
GND4 VBATT +VPWR
C136 8p
C137 C135
10 5
33u
GND3 GND1 1u
C138
FL101
L112 9 6
GSM_OUT VRAMP
NA
15nH EFCH897MTDB1
8 7
GND2 GSM_IN
R117 2.2K
GSM_PA_RAMP
C146 10p C143
68p
C142
L113
4.7nH
0.75p
GSM_PA_BAND MODE
LOW GSM
DCS/PCS
HIGH
PQ
VDD_RX
L115
C149 EFCH2140TDE1
22p FL102
L114 1nH
1.5nH
2 3
C153 C154
G1 O1
WLNA_OUT
IN
1
C152 56p G2 O2
56p
3.9p 5 4
L117 L118
1.8nH
1nH
PQ
+VPWR
C160 C162 C163 C164
22u
0.01u 100p 1u
U105
11
U104 GND5
10 1
VCC2 VCC1
9 2
C170
SCDY0003403 GND4 RFIN
C169 5.6p 8 3
RFOUT GND1
7 4
1.8p GND3 VMODE
4.7nH 6 5
GND2 VREF
L128 L126
8.2nH
20dB
AWT6277R
C173
100p
R124
R123
51
PWR_DET
68
R125 R126
100 100
8 dB
4 4 5 5 6 6
7 7 8 8 9 9
55
ENV_OUT
C105 56p
46
WCDMA_2100_TX_OUT HB_RF_OUT1
C106 6p 44
DCS_PCS_TX HB_RF_OUT2
C108 5p
43
GSM_TX LB_RF_OUT1
42
LB_RF_OUT2
24
TX_ON RF_ON
56
TX_AGC_ADJ VCONTROL
54
DAC_REF DAC_REF
U100
14
SSBDT_RTR SBDT
R100
(1%)
12K RTR6275
3
C116 R_BIAS1
27
12p R_BIAS2
R101 (1%)
680
31
GCELL_INP
C117 22p 30
GCELL_INN
32
EGSM_INP
33
EGSM_INN
38
DCS_INP
39
DCS_INN
36
GPCS_INP
37
GPCS_INN
22
CAL_INP
23
CAL_INN
26
RX_WCDMA_2100 WLNA_IN
WLNA_OUT
WCDMA_MIX_IN_P
WCDMA_MIX_IN_M
VREG_MSMP_2.7V
C132
0.01u
R111
DCS_PCS_TX
68
R112 R113
10 dB
91 91
3 2
R114
G2 G1
IN GSM_TX VREG_TCXO_2.85V
1
O1 G3
51
4 5 8 dB
R118 R119
120 120
TCXO_PM
RTR6275_TCXO
L116
WCDMA_MIX_IN_M
1nH
C155
0.5p
L119
WCDMA_MIX_IN_P
1nH Rev. 1.1
VREG_MMC_3.0V
FL104
EFCH1950TDF1
C159
8.2p
4 5 C161
O1 G3
1
IN WCDMA_2100_TX_OUT
L123 G2 G1
56p
L124 15nH 3 2 C165
3.3nH NA L122
NA
PA_R1
Q100
VREG_TCXO_2.85V
PA_ON
KRX102E
7 7 8 8 9 9
- 171 -
10 10 11 11
C100
180p
TX_IP
C103
180p TX_IM
2
ENV_LNP
1
ENV_LNN
C107
51
TX_IP 180p TX_QP
50
TX_IN
53
TX_QP
52
TX_QN C110 TX_QM
180p
7
TCXO
C111 3300p
5
VTUNE1
C112 1000p
18
VTUNE2 VTUNE-Connected directly to GND RTR6275_TCXO
12
RX_IP RX_IP
13
RX_IN RX_IM
10
RX_QP RX_QP
11
RX_QN RX_QM
40
PWD_DET_IN R102
PWR_DET
21
TEST
R103 NA
0
4 R104 5.1
VDDA1 VREG_RF_SMPS
6
VDDA2
8
VDDA3 22u
9 R107 2.7
VDDA4 C118
15
VDDA5
16
VDDA6
19
VDDA7
20
VDDA8
28
VDDA9
41
VDDA10
45
VDDA11
47
VDDA12 VREG_SYNTH_2.6V
48
VDDA13 C126 C127 C125
49 1u
VDDA14 22p 100p
VDD_RX
C128
22p
VREG_RF_SMPS
C131 C129
100p 0.1u 22u
C130
SMPS circuit for RF
C133 C134
22p 1000p
near to 48pin
TCXO
X100
OUT GND
3 2
R115 100ohm
VCC VCONT TRK_LO_ADJ
4 1
19.2MHz
C139 C140 C141
Thermistor circuit deleted
0.1u 1000p 0.01u
VREG_BT_2.85V
C145
C144 1000p R120 100K
1000p
C147 1000p C148 8200p
TCXO_BT
U102
TC7SH04FS
FM RADIO
C150 C151
0.1u 0.01u
U103 TEA5766UK
E6
VAFR FM_AUDIO_R
A1 E5
CPOUT VAFL FM_AUDIO_L
A2 E4
LOOPSW MPXOUT
L120
A3 E3
LO1 VREFDIG VREG_MSMP_2.7V
47nH
A4 E2 TP100
LO2 CLOCK I2C_SCL
A5 E1 TP101
VCCVCO DATA I2C_SDA
C157
A6 D6
C158 VCC TMUTE
0.1u
1u
B1 D5
SWPORT ISS
TP102 B2 D3
FM_INTX INTX DGND2
B5 D2
AGND DGND1
B6 D1
RFIN1 VDD
C1 C6
FREQIN RFIN2
C2 C5
FM_BUSEN BUSEN RFGND
C166
100p
C171
56p
L127
100nH
C172
27p
TP103
SLEEP_CLK
10 10 11 11
LGE Internal Use Only
12 12
A A
B B
C C
D D
E E
F F
G G
FM_ANT
H H
12 12