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7. CIRCUIT DIAGRAM
1
1
1
2
2
2
3
3
3
4
4
4
SW500
C500
KMS-512
C501
56p
0
G2 RF
ANT500
ANT G1
ESHS-L090UB
FL500
L502
C502
7
1p
GND1
EGSM_RX1
NA
L504
9
GND2
EGSM_RX2
56nH
11
ANT501
GND3
DCS_RX1
13
GND4
DCS_RX2
18
A
A
A
GND5
PCS_RX1
20
GND6
PCS_RX2
17
ANT_SEL0
VC1
DCS_PCS_TX
15
ANT_SEL1
VC2
EGSM_TX
14
ANT_SEL2
VC3
UMTS_TX_RX
C509
C510
C511
47p
47p
47p
L514
7.5nH
VREG_RFR_2.85V
C519
C520
B
B
B
47p
0.1u
C528
C529
NA
NA
C530
C531
ANTENNA SWITCH MODULE LOGIC
33p
33p
C
C
C
L522
IN_A
IN_B
IN_C
L523
18nH
GSM900 TX
HIGH
LOW
LOW
22nH
L524
DCS/PCS TX
LOW
HIGH
HIGH
1.5nH
PCS RX
LOW
HIGH
LOW
UMTS 2100
LOW
LOW
LOW
DCS RX
LOW
LOW
HIGH
GND6
GSM 900 RX
LOW
LOW
LOW
GND5
12
VCC
D
D
D
GND4
GND3
9
GSM_OUT
GND2
GSM/EDGE
E
E
E
WCDMA
C560
1.8nH
F
F
F
+VPWR
C568
C570
C571
22u
0.01u
0.01u
WCDMA_2100
C
C
C
ACMD-7601
U506
C575
R530
1.8nH
3.9nH
RX
TX
1.2p
L527
47
D
D
D
C580
C581
12p
E
E
E
C586
1.2p
VREG_RFR_2.85V
F
F
F
1
1
1
2
2
2
3
3
3
4
4
4
LG(42)-A-5505-10:01
LG(42)-A-5505-10:01
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5
5
5
6
6
6
7
7
7
8
8
8
1
2
3
4
5
6
8
C507 1.5nH
10
19
WCDMA_2100
C512
C513
NA
NA
GSM_PA_RAMP
R506
2.2K
C536
(1%)
68p
R513
VBATT
0
1
DCS_PCS_IN
C544
C543
100p
22u
2
BS
GSM_PA_BAND
3
U501
TX_EN
GSM_PA_EN
MQW5V0C869M
TQM7M5003
4
10
VBATT
5
R516
15
GND1
R518
15
6
VRAMP
R522
R523
7
R520
R521
12
270
GSM_IN
270
13
220
220
15
14
R524
51
UMC4N
Q500
C558
0.01u
U503
C561
EFCH1950TDC1
3
22p
G3
4
1
OUT
IN
WCDMA_2100_TX_OUT
G2
G1
5
2
L525
L526
8.2nH
3.9nH
R529
6.2K
W_VMODE_N
C569
15p
RFIN
COMM
VOPS VRMS
ADL5500 U504
C572
C573
C574
1500p
0.1u
100p
GND2
VREF
6
5
GND3
VMODE
7
4
RFOUT
GND1
8
3
GND4
RFIN
9
2
VCC2
VCC1
10
1
GND5
11
AWT6277R
U505
ILNA_OUT
13
PLNA_OUT
14
ILNA_OUT
15
PLNA_BIAS
16
PLNA_IN
17
ILNA_BIAS
18
ILNA_IN
19
VDDRF3
20
RX_IP
21
C587
RX_IM
22
680p
RX_QP
23
RX_QM
24
VDDA2
C594
C595
10
0.1u
10p
R535
RX0_Q_M
CP2_OUT
C598
C599
RX0_Q_P
C800
0.1u
100p
RX0_I_M
100p
RX0_I_P
5
5
5
6
6
6
7
7
7
8
8
8
9
9
9
10
10
10
11
11
11
12
12
12
L500
L501
3.3nH
3.6nH
L507
C504
5.1nH
1000p
L510
L505
3.3nH
3.6nH
L508
7.5nH
C508
33p
FB500
C514
VREG_RFTX_2.85V
1000p
L511
L513
C516
C515
5.1nH
7.5nH
33p
33p
R501
(1%)
C521
4.3K
L516
(change to 4.53k)
680p
L517
10nH
C525
9.1nH
0.01u
C526
6.8n
CP_HOLD2
ECHU1C682JX5
29
C527
CP2_OUT
CP2
30
1000p
VDDA9
L519
31
UHF_LO_BUFF
RX_VCO_IN
9.1nH
32
R_BIAS
(1%)
33
R503
11.3K
GSM1800_INN
34
L520
GSM1800_INP
35
10nH
VDDA10
36
GSM900_INP
37
GSM900_INN
38
R507 100
(1%)
(1%)
VDDA11
R508
0
39
TX_MOD_CP
40
C535
VDDA12
R510
41
C537
330p
TX_VCO_FB
42
120p
100
C539
(1%)
5.6n
ECHU1C562JX5
C541
82p
TX_ON
R514
100ohm
VREG_MSMP_2.7V
C545
C546
C547
0.01u
1000p
100p
U502
FB502
3
VC
VB
VREG_RFTX_2.85V
R517
100ohm
1
9
OUT_GSM
SW1
GSM_TX_VCO_0_EN_N
5
11
R519
100ohm
OUT_DCSPCS
SW2
GSM_TX_VCO_1_EN_N
8
2
C553
TX VCO CONTROL LOGIC
GND5
GND1
4
4.7u
GND6
GND2
C554
C557
6
tcc_1608h_9_r
GND7
GND3
7
33p
15p
C556
SW2
SW1
GND8
GND4
15p
GSM850/900
HIGH
LOW
C555
0.1uF
DCS1800/PCS1900
LOW
HIGH
NO OSCILLATION
HIGH
HIGH
TCXO
VREG_RFTX_2.85V
19.2MHz
C559
100p
PA_ON
TCXO_PM
OUT
GND
3
C562
1000p
RTR6250_TCXO
VCC
VCONT
4
C563
1000p
X500
RFR6250_TCXO
VREG_TCXO_2.85V
C566
C567
0.1uF
1000p
HDET1
IMT_RX_P
IMT_RX_M
VREG_TCXO_2.85V
C582
C583
C585
100p
0.1u
100p
49
PGND
48
GLNA_BIAS
47
GLNA_IN
R532
46
R_BIAS
45
11.3K
VDDA8
44
SBST
RF_SBST
43
SBDT
RF_SBDT
42
(1%)
SBCK
RF_SBCK
R533
41
VDDM
VREG_MSMP_2.7V
40
GRX_IP
C589
C590
51
39
GRX_IM
10p
1u
38
GRX_QP
R534
37
GRX_QM
C592
C593
10
100p
4.7u
RFR6250_TCXO
UHF_LO_BUFF
C597
100p
9
9
9
- 195 -
13
13
13
14
14
14
15
15
15
16
16
16
DAC_REF
TX_I_M
L503
C503
2.2uH
47p
L506
2.2uH
TX_I_P
TX_Q_M
L509
C505
2.2uH
47p
L512
2.2uH
TX_Q_P
R500
C517
10
0.1uF
L515
47nH
VREG_SYNTH_2.85V
C522
L518
C523
C524
C518
33p
100p
0.1uF
4.7u
47nH
RX_IN
RX0_I_M
14
RX_IP
RX0_I_P
13
RX_QN
RX0_Q_M
12
RX_QP
RX0_Q_P
11
VDDA4
10
L521
VCO_TUNE
R504
0
9
47nH
RTR6250D
VTUNE_REF
8
U500
VDDA3
VREG_RFTX_2.85V
7
TCXO
RTR6250_TCXO
6
R505
0
VDDA2
5
VDDA1
(1%)
4
R509 3.3K
FAQ1
C534
C532
C533
3
CP1
0.1uF
33p
33p
2
CP_HOLD1
C538
1
3.9n
ECHU1C392JX5
C540
R512
0.01u
6.2K
C542
(1%)
390p
WCDMA_2100_TX_OUT
TX_AGC_ADJ
FB501
R515
1K
VREG_RFTX_2.85V
C549
C550
C551
C552
33p
100p
C548
0.1uF
4700p
4.7u
RF_SBST
RF_SBDT
RF_SBCK
Thermistor Circuit
R525
2
100ohm
TRK_LO_ADJ
1
C564
R526
0.01u
80.6K
VREG_RFTX_2.85V
PA_THERM
(1%)
R528
C565
470K
0.068u
R527
(1%)
68K
IMT_RX_P
L528
2.7nH
FL501
B7827
2
3
G1
O1
1
L529
ILNA_OUT
IN
G2
O2
33nH
5
4
L530
L531
2.2nH
2.7nH
IMT_RX_M
Section
Date
Sign & Name
MAY
MODEL
JOY 1.3
Designer
LGE
2006
Checked
DRAWING
RF
NAME
NAME
Approved
Approved
DRAWING
DRAWING
LG Electronics Inc.
LG Electronics Inc.
NO.
NO.
LG Electronics Inc.
LG Electronics Inc.
LGE Internal Use Only
A
A
A
B
B
B
D
D
D
E
E
E
F
F
F
C
C
C
C
C
C
D
D
D
E
E
E
Sheet/
Sheet/
Sheets
Sheets
5/7
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