LG CG225 Service Manual page 106

7. CIRCUIT DIAGRAM
1
A
ANT_PAD
B
RF2.85V
C529
1000p
ANT_SW1
C
ANT_SW2
D
E
LGIC(42)-A-5505-10:01
2 3 4
ANT_SW1 ANT_SW2
PIN 15 PIN 14
GSM850_EGSM RX L L
GSM850_EGSM TX L H
DCS/PCS RX H L
C506
100p
DCS/PCS TX H H
L503 1.5nH
C508 8.2p
C511
C512 L505
100p
1.5p 5.6nH
SW501
KMS-507
C514 1.5p
C515 1.5p
C516
22p
C518 1.2p
C519 1.2p
11 1
VDD GSM850_RX1
2
GSM850_RX2
15 3
CTRL1 GSM900_RX1
14 4
CTRL2 GSM900_RX2
FL501 5
GSM1800_RX1
9 6
DGM081
GND1 GSM1800_RX2
13 7
GND2 GSM1900_RX1
16 8
GND3 GSM1900_RX2
C521 1.2p
18
GND4
19
GND5
20 12
GND6 GSM850_900_TX
10
C522 1.2p
GSM1800_1900_TX
C526 1p
C527 1p
RF2.85V
R513
270K
R515
680
R516
4.7K
2 3 4
5 6
L501 6.8nH
GSM_OUT GSM_IN
8 7
C540
C507 VRAMP
1.5p
6
1p GND23
32
U501
GND22 GND
31 5
GND21 RF3166
30
GND20 VBATT
29 4
GND19
28
GND18 TX_ENABLE
27 3
GND17
26
BAND_SELECT
2
L504 2.7nH
DCS_PCS_OUT DCS_PCS_IN
9 1
C509 C510
2p 1.5p
RF2.85V
L506
33nH
C517
0.1u
L507
24
RFIAN SCLK
23
33nH
RFIAP _SEN
22
RFIEN SDIO
21
RFIEP U502 BQN
20
RFIDN SI4210 BQP
19
RFIDP BIN
18
RFIPN BIP
17
RFIPP XOUT
RFOH
L508
8.2nH
RFOL
RF2.85V
C524 C525
0.1u 0.1u
L509
6.8nH
VBAT
U503
1 5
VDD VOUT
2
GND
3 4
RF_EN CE NC
R1114N281D-TR-F
C560 C532
1000p 4.7u
R514
22K
TEMPSENSE
Iss. Notice No. Date Name
5
- 105 -
7 8 9
VBAT
C504 C501 C502 C503
33u 0.1u 47p 10p
R501 24
R503 R502
C505
220 220 0.1u
R517
C539 0
27p
R504 20
R505 C513
R506
100p
10K
300
R530
100
R531
100
R532
100
C561 C531 C562
18p 33p 8p
1
2
3
4
5
6
7
8
R507 560
C520
390p
R508 560
C523 R509 560
390p
V_IO
R510 560
R511 560
RF2.85V
RF2.85V
X501 26MHz
R512
1 3 C528 1000p
AFC VCONT OUT
12K
2 4
GND VCC
C530
C533 C534 C535 C536
1u
NA 10u 1u 1000p
Section Date Sign & Name
MODEL
CG225
060210 C.S.CHO
Designer
B.Y.YANG
Checked
DRAWING
NAME
Approved H.KANG
DRAWING
LG Electronics Inc.
NO.
10
RFOL
APC
PA_ON
PA_BAND
RFOH
TCXO_OUT
S_CLK
S_EN
S_DATA
RXQN
RXQP
RXIN
RXIP
C
TXQN
TXQP
TXIN
TXIP
26MHz
PDNB
D
TCXO_OUT
Sheet/
Sheets
5/5
RF_AERO II
REV_1.0
LG Electronics Inc.