Circuit Diagram - LG CU405 Service Manual

7. CIRCUIT DIAGRAM

1 2 3
ANT100 SW100
C80 56p
L90 G2
ANT RF
6.8p G1
KMS-507
14
A
VC1
13
VC2
12
VC3
11
VC4
15nH L106
10
VREG_RF_2.85V VDD
9
C86 C87 GND1
18
0.1u 33p GND2
20
GND3 U100
21
GND4
23
GND5
24
GND6
26
GND7
27
GND8
1K R100 28
ANT_SEL0 GND9
1K R101
B
ANT_SEL1
1K R102
ANT_SEL2
LMSP4LMA-573TEMP
1K R103
ANT_SEL3
C
L121
15nH
NA
ANTENNA SWITCH MODULE LOGIC
L123
LMSP4LMA-573TEMP_Rev B Later
ANT_SEL0 ANT_SEL1 ANT_SEL2 ANT_SEL3
D
GSM900/GSM850 TX HIGH HIGH LOW LOW
DCS/PCS TX HIGH LOW LOW LOW
GSM 850 RX LOW LOW LOW LOW
GSM900 RX LOW LOW HIGH LOW
DCS RX LOW HIGH HIGH LOW
PCS RX LOW HIGH LOW LOW
UMTS 850 HIGH LOW HIGH LOW
UMTS 1900 HIGH
LOW HIGH HIGH
GSM/EDGE
E
WCDMA
WCDMA_1900
FL101
C135 33p
U103
RX TX
ACMD-7402-TR1G
20dB
F L125
C142
RX_WCDMA_1900
82p 5.6nH
C150
U106
56p
FL104
WCDMA_850 ANT TX 22dB
C L129
C156
RX RX_WCDMA_850
39p 15nH
GND1 GND6
GND2 GND5
CP0402A0836BNTR
GND3 GND4
LM56C
D
FL105
2 3
L135 15nH
C163 G1
1
IN
33p G2
5 4
VREG_W
E
FL106
2 3
L142
C183
1 G1
IN
82p G2
2.7nH
5 4
F
1 2 3
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4 5 6 7
L100
NA
L102
L104
1
GSM1800RX1
2
GSM1800RX2
3
GSM1900RX1
4
GSM1900RX2
5 L105
GSM900RX1
6
GSM900RX2
7
GSM850RX1
8
GSM850RX2
L108
L109
C88 56p
15
UMTS1 WCDMA_850
16 1.8nH
UMTS2
22
GSM1800_1900TX
25
GSM850_900TX
17
NA
NC L111 L112
L114
WCDMA_1900
56p
1.5nH
47nH
L118
C101
1.2p
+VPWR
4.7nH
L120
NA
L122
14 1 R108
DCS_PCS_OUT DCS_PCS_IN DCS_PCS_TX
82
2
GND5 BS GSM_PA_BAND
11.4dB
3
GND4 TX_EN GSM_PA_EN
11 4
U102
VCC VBATT
TQM7M5003
5
GND3 GND1
FL100
6
GND2 VRAMP
8 7 5 1
GSM_OUT GSM_IN RFOUT RFIN
R114
7
GSM_PA_RAMP VC
2.2K
LMSM32AA-533
200 R117
GSM_SAW_SW_MODE
VREG_W_PA
VREG_RF_2.85V
C133
C131 8.2p
1.8nH 2200p
C136 FL102
R119
OUT IN
1.2nH
GND2 GND1
B9014
18 1
NC7 VREG_PCS
17 2
NC6 RFIN_PCS
U105
16 3
RFOUT_PCS VREG_CELL
15 4
NC5 RF5144 VMODE_CELL
14 5
RFOUT_CELL RFIN_CELL
13 6
NC4 VCC1_CELL
L127 4.7nH C149
68p
C153 12p
1.5nH
VREG_W_PA
L131
R127 56
PWR_DET
8.5dB
L133 1.2nH
14
RX_WCDMA_850 LB_LNA_IN
10
LB_LNA_OUT
O1 C164 4p 15nH 5
LB_INP
L134
O2 4
LB_INM
15
RX_WCDMA_1900 HB_LNA_IN
C167 4p 15nH
9
HB_LNA_OUT
L137
7
HB_INP
6
HB_INM
L139 1.2nH
100p
32
GPS_PLNA_IN
35
C176 GPS_PLNA_OUT
37
GPS_INP
38
U107
GPS_INM
R132 11.8K (1%) 2
R_BIAS
C181 10p R133 5.62K (1%)
13
R_BIAS_UMTS
C182 L141
33
R_BIAS_GPS
39nH
O1 1.8p
O2
23
SSBDT_RFR SSBI
C189 L143 34
BLANK
1.8p 39nH
24
GND
49
GND_SLUG
C190 10p
R137
22
VREG_MSMP_2.6V VDDM1
25
51
VDDM2
RFR6275
4 5 6 7
8 9 10 11
4.7nH
L101
12nH
4.7nH
5.1nH
L107
12nH 55
ENV_OUT
5.1nH
46
WCDMA_1900_TX_OUT HB_RF_OUT1
C89 6p
44
DCS_PCS_TX HB_RF_OUT2
C90 6p
43
GSM_TX LB_RF_OUT1
C93 5p
L110 22nH 42
WCDMA_850_TX_OUT C94 12p LB_RF_OUT2
24
TX_ON RF_ON
L113
56nH 56
TX_AGC_ADJ VCONTROL
L115 22nH
54
DAC_REF DAC_REF
C99
U101
14
12p
SBDT
R104 12K (1%) RTR6275
L116 27nH 3
R_BIAS1
27
R_BIAS2
L117
R105 680 (1%)
SSBDT_RTR
47nH
31
GCELL_INP
30
GCELL_INN
L119 27nH
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
WLNA_IN
8dB
R112
GSM_TX
51
VREG_MSMP_2.6V
EGSM LOW
GSM850 HIGH
remain LOW when not transmitting
Q100 VREG_TCXO_2.85V
PA_ON2
VREG_RF_2.85V
KRX102E
R120
WCDMA_1900_TX_OUT
0
TCXO_PM
Q101
RTR6275_TCXO
RFR6275_TCXO
PA_ON1
VREG_RF_2.85V
KRX102E
FL103
L128
WCDMA_850_TX_OUT
OUT IN
3.3nH
GND2 GND1
B9003
17
RX_QP
RX_QP
18
RX_QM RX_QM
19
RX_IP RX_IP
20
RX_IM RX_IM
27
GRX_QP RFR6275_TCXO
28 10K R130
GRX_QM
C170
C169
29
2.2n
GRX_IP 150p
30
(PPS)
GRX_IM
45
TCXO
C174
41
GPS_CP_OUT
47 0.01u
UMTS_CP_OUT
12
NC1 C180
43
NC2 0.068u
44
NC3
R134
1
VDDA1 VREG_RFRX_1_2.6V
L140 47nH
3
VDDA2 0
8
VDDA3
11
VDDA4 C184 C185 C186
16
VDDA5 33p 0.1u 33p
21
VDDA6
26
VDDA7
31
VDDA8
36
VDDA9
39 R136 10
VDDA10
40
VDDA11
42
VDDA12
46
VDDA13
48
VDDA14
VREG_W
8 9
- 133 -
12 13 14 15
TX_IP
C83
180p
C84
180p
2
ENV_LNP TX_IM
1
ENV_LNN
TX_QP
51
TX_IP C91
50
TX_IN 180p
53
TX_QP
52
TX_QN C95
180p
7
TCXO RTR6275_TCXO TX_QM
5 C96 3300p
VTUNE1
C97 1000p
18
VTUNE2
VTUNE-Connected directly to GND
12
RX_IP RX_IP
13
RX_IN RX_IM
10
RX_QP RX_QP
11
RX_QN RX_QM
40
PWD_DET_IN PWR_DET
21
TEST
R106 5.1
VREG_RFRX_1_2.6V
4
VDDA1
6
VDDA2
8
VDDA3
9 R107 5.1
VDDA4
15
VDDA5
16
VDDA6
19
VDDA7
20
VDDA8
28
VDDA9
41
VDDA10
45
VDDA11
47 10 R109
VDDA12 VREG_SYNTH_2.6V
48
VDDA13
49
VDDA14
VREG_RFTX_2.6V
TCXO
Thermistor Circuit
R118
4 1 100ohm
VCC VCONT TRK_LO_ADJ
3 2
OUT GND
TG-5010LH_19_2M
X100
19.2MHz
R121
VREG_RF_2.85V
C137 0.01u
80.6K
R122
(1%) C141
C140 1000p
470K
0.068u
(1%)
C144 1000p R124 100K
C145
1000p
VCC
5
C147 1000p
2 4
TCXO_BT
U104
3
TC7S04FU GND
BLUETOOTH
10OL21C7AJ00003
NC GND L132 GND1
16
FEED ANT M100 GND2
4.7nH
GND3
NA RB04
ANT101
C161
C166
0.1u C175
C177 100p
Section Section Date Date Sign & Name Sign & Name
CU405
09/15
CU400
MODEL MODEL
J.H.PARK
Designer Designer
2006 2006
Checked Checked
DRAWING DRAWING
NAME NAME
Approved Approved
DRAWING DRAWING
Rev_1.1
LG Electronics Inc. LG Electronics Inc.
NO. NO.
LGMC
LGE Internal Use Only
16
A
B
C
D
E
PA_THERM
F
C
1
7
15
D
VREG_BT_2.85V
1u
VREG_MSMP_2.6V E
Sheet/ Sheet/
Sheets Sheets
1/6
RF/BT
LG Electronics Inc. LG Electronics Inc.