Circuit Diagram - LG KT520 Service Manual

7. CIRCUIT DIAGRAM

1 2 3
A
VBAT
ANTSW0
B TX_DCSPCS
ANTSW1
ANTSW2
VAPC
TX_EGSM
RX1800
RX1900
RX900
C C104 C103 C102 C101
10u 10u 0.01u 22p
D
E
L108
R106
TX_DCSPCS
2.7nH
24
C135 C136 R107
F 3.3p 2.7p 220
G
H
1 2 3
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4 5 6
1 32
ENABLE GND18
2 31
DCS_PCS_IN GND17
3 30
BS_1 GND16
4 29
BS_2 GND15
5 28
VBATT GND14
6 27
VAPC GND13
7 26
U101
GSM_IN WCDMA WRF_BAND_1
8 25
MODE GND12
9 24
GND1 SKY77513 GND11
10 23
GND2 GND10
11 22
GND3 GND9
C114 22p
12 21
GND4 ANT
13 20
GND5 GND8
14 19
DCS_RX1 GND7
15 18
DCS_RX2 GND6
16 17
GSM_RX1 GSM_RX2
R130 51
DNI
C648
C112 C113 C105
22p 22p 22p
C126 22p
C123 22p
RX1800
L102
10nH
FL101 SAFEB1G84FA0F00 FL102 SAFEB1G96FA0F00
L104 5.6nH L107 5.6nH
C130 C131 C133
5.6p 5.6p 5.6p
R103
TX_EGSM
36
1 30
GNDA5 GNDA6
2 29
VAPC AMMOD RX900N
3 28
GNDA7 RX900P
4 27
TXHB GNDA8
5 26
GNDA9 RX800P
6 U103 25
RF_CTRL_STRB STR RX800N
7 24
RF_CTRL_DATA DATA RF3000_OM6191HN VCCA
8 23
RF_CTRL_CLK CLK GNDA10
9 22
R108 TESTOUT TESTOUT DATAC
10 21
220 MCLKREQ MCIKREQ DATASTR
WCLK
X101
4 3
1 2 R111
100K
26MHz
KSX-23-26000KFA-QA0R
R113
100K
MCLK
120K 27p
C139 C140
4 5 6
7 8 9
ANT101 OUT101 GND101
KMS-512 SW101 C115
G2
RF ANT
G1
0
DNI
C116
L101
22nH
C124 22p C125 22p
RX1900
L103
10nH
C134
5.6p
C129 12p
4 5
L105 FL103 C127 22p C128 22p
O2 G2
IN RX900
18nH 1
O1 G1 SAFEB942MFL0F00
3 2
C132 12p
L106
10nH
VRADA_2V8
AMP_LSB_FREQ_LSB
DCLK_DATSTR
27p C138
0.01u
C137
QDATA_AMP_MSB
IDATA_FREQ_MSB
VDIGRAD_1V8
7 8 9
- 177 -
10 11 12
LGE Internal Use Only
A
VDDK_2V75
B
FB101
60
U102 SN74LVC1G125DRLR
1 _OE 5
BT_CLKREQ_n VCC
2
MCLK A
R101
3 4
GND Y BT_CLK
33
C121 C122
0.1u 4.7u
C
D
E
ADOUT
RTEMP
F
G
H
10 11 12
LGE Internal Use Only