LG KS20 Operating Instructions Manual page 155

7. CIRCUIT DIAGRAM
1 2 3
ANT500 ANT501
R500
SW500
0
L500 KMS-506 C503
C502
G2
ANT RF
G1
A 3.9nH 4.7p
33p
C505 C506
L502
ENWY0002301
1.5p NA
100nH
Rev.F
FL500
LSHS-M090UE
14 11
ANT_SEL0
VC1 ANT
15
ANT_SEL1 VC2
16 13
ANT_SEL2 VC3 VDD
1 7
GND1 NC
2
B GND2
C514 C515 C516 4 3
GND3 DCS_PCS_TX
33p 33p 33p
5 6
GND4 EGSM_TX
8 9
GND5 UMTS_TX_RX
10 19
GND6 DCS_RX2
12 20
GND7 DCS_RX1
17 21
GND8 PCS_RX2
18 22
GND9 PCS_RX1
25 23
PGND1 EGSM_RX2
26 24
PGND2 EGSM_RX1
SFAY0010001
C
ANTENNA SWITCH MODULE LOGIC
ANT_SEL0 ANT_SEL1 ANT_SEL2
GSM 850/GSM 900 TX HIGH HIGH LOW
HIGH LOW LOW
GSM 1800/GSM 1900 TX
GSM 850 RX - - -
GSM 900 RX LOW LOW LOW
GSM 1800 RX LOW LOW LOW
D
GSM 1900 RX LOW LOW HIGH
WCDMA HIGH LOW HIGH
E
GSM
F
WCDMA
C545
C
0.5p
FL503
L520 C553
1
RX_WCDMA_2100 RX PGND
1nH 2
33p TX ANT
D
ACMD-7602
C554
SDMY0001301
3p
E
F
1 2 3
LG(42)-A-5505-10:01
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4 5 6 7
L501
VRF_SMPS
15nH
C509
0.1u
L503 5.6nH
DCS(1805-1880 MHz)
L505 5.6nH
L506 5.6nH
PCS(1930-1990 MHz)
5.6nH
L508
L509 27nH
GSM(925-960 MHz)
L511 27nH
GSM_PA_BAND MODE
LOW GSM
DCS/PCS
HIGH
R510
VBAT
2.2K
C533
C538
C534
100p 68p
22u
(1608)
TQM7M5008
C539 C540
14 1
GND6 DCS_PCS_IN
33p
4.7p
13 2
GND5 BS
L512
12 3
2.2nH
VCC TX_EN
U501
11 TQM7M5008 4
GND4 VBATT
10 5
GND3 GND1
C541 L513 FL501
9 6
GSM_OUT VRAMP
EFCH897MTDB1
6.8nH
15p SFSY0030201
8 7
GND2 GSM_IN
L514
12nH
L515
VDD_RX
2.7nH
C543
L516
22p
1nH
C549
33p
WLNA_OUT
4
3
VPWR
SMPY0015501
C555 C556 C557
10u
220p 100p
ACPM-7381
(1608)
11
PGND
10
VCC2
U502
9
C560 33p
GND3
8
RFOUT VMODE1
SCDY0003402 7
33p C561 GND2 VMODE0
6
C563 C564 GND1
1.5p
NA
20dB
As close as possible
R518
51
R519
PWR_DET
75
R520 R521
91 91
10dB
4 5 6 7
8 9 10 11
55
ENV_OUT
C504 6p 46
WCDMA_2100_TX_OUT HB_RF_OUT1
C507 6p 44
DCS_PCS_TX HB_RF_OUT2
C510 4p 43
GSM_TX LB_RF_OUT1
42
L504
LB_RF_OUT2
15nH
24
RTR_TX_ON RF_ON
56
RTR_TX_AGC_ADJ VCONTROL
54
RTR_DAC_REF DAC_REF
L507
12nH 14
C517 SBDT
R501
12p (1%)
12K
3
R_BIAS1
27
R_BIAS2
R502
SSBDT_RTR (1%)
680
L510 Rev.H 31
GCELL_INP
33nH 30
GCELL_INN
32
EGSM_INP
33
EGSM_INN
38
DCS_INP
39
DCS_INN
36
GPCS_INP
37
GPCS_INN
22
Rev.F
CAL_INP
23
CAL_INN
26
RX_WCDMA_2100 WLNA_IN
WLNA_OUT
WCDMA_MIX_IN_P
WCDMA_MIX_IN_M
R509
VMSMP_2.6V
GSM_PA_RAMP 100
C535
0.01u
GSM_PA_BAND
GSM_PA_EN
R511
DCS_PCS_TX
18
R512 R513
300 300
3 dB
4 5
R514
O1 G3 1
IN GSM_TX
G2 G1
18
3 2
R515 R516
300 300
3 dB
WCDMA LNA Circuit
FL502 L517
WCDMA_MIX_IN_P
EFCH2140TDE1 1nH
5 4
C547 L518
1 G2 O2
C546
IN
3.3nH G1 O1 0.5p
33p
C550 2 3
0.75p
L519
WCDMA_MIX_IN_M
1nH
U503
1 4 5 L522
VCC1 C558 L521 C559
2 O1 G3 1
RFIN IN WCDMA_2100_TX_OUT
3 G2 G1
2.7nH
33p 33p 4.7nH
4 3 2
5
L524
VEN 10nH
10nH
C565 L523
C566 100p
FL504
100p
EFCH1950TDF1
WCDMA_PA_R0
WCDMA_PA_ON
8 9
- 157 -
12 13 14 15
RTR_TXIP
C500
180p
C501
180p
RTR_TXIM
2
ENV_LNP RTR_TXQP
1
ENV_LNN C508
180p
51
TX_IP
50
TX_IN C511
53
TX_QP 180p
52
TX_QN RTR_TXQM
7
TCXO TCXO_RTR_19.2MHz
5 C512 3300p
VTUNE1
18 C513 1000p
VTUNE2 VTUNE-Connected directly to GND
12
U500 RX_IP RTR_RXIP
13
RX_IN RTR_RXIM
RTR6275
10
RX_QP RTR_RXQP
11
RX_QN RTR_RXQM
40
PWD_DET_IN PWR_DET
21
TEST
4 R503 5.1
VDDA1
R504 2.2
6
VDDA2 C518
8 1u
VDDA3
9
VDDA4
15 R505 DNI
VDDA5
16 R506 2.2
VDDA6
19 R507 5.1
VDDA7
20
VDDA8 C519 C520
28 R508 10
VDDA9 10u 1000p
41
VDDA10 smd_1608h_9_r
45
VDDA11
47
VDDA12
48
VDDA13
49
VDDA14 VRF_SMPS_SENSE
C536 C537
1000p 22p
TCXO Circuit
C542
C544
1000p 0.1uF
X500
R517
1 4
RTR_TRK_LO_ADJ VCONT VCC
100ohm
2 3 100p C548
C551 GND OUT TCXO_PM_19.2MHz
0.01u
19.2MHz
1000p C552
TCXO_RTR_19.2MHz
EXSK0007802
TG-5010LH_19_2M_75A
Thermistor circuit deleted
LGMC
LGE Internal Use Only
16
A
B
VSYNT_2.85V
VRF_SMPS
C
VDD_RX
D
E
F
VTCXO_2.85V
C
D
E
LG Electronics Inc.