LG KT520 Service Manual page 177

7. CIRCUIT DIAGRAM
1 2 3
A
VCC_PA
B
C201
0.01u
WTX_BAND_1_EN
WPA_BIAS C204
C205 1000p
C207 10p
U201 SKY77174
22p
1
VCC1 PGND
2
ENABLE VCC2
3
VCONTROL GND3
C208
4
WTXMOD_BAND_I RF_IN RF_OUT
56p VBAT
GND2
C211 C210
5
DNI DNI VBIAS GND1
C
D
E
5 2
G2 G1 C219
WTXMOD_BAND_I OUT IN
4 1
G3
56p
3
SAFEB1G95KA0F00 FL202
F
VRADA_2V8
WTX_I_P
WTX_I_N
WTX_Q_P
WTX_Q_N
G
H
1 2 3
LGE Internal Use Only
C206
1000p
11
10
9 L201 IS201 CES201G95DCB000
LDC181G9519B-327
1.5nH N201
GND1 GND2
8 1 6
IN M_OUT IN OUT
GND3 GND4
7 2 5
GND1 GND2
10nH
C212
6 L203 3 4
0.5p C_OUT TERMINATE
WPOW_SENSE
C218
C217
DNI
56p
FL201 SAFEB2G14FA0F00
VRADA_2V8
VRADA_2V8
WPA_BIAS
WPA_VCC
VDIGRAD_1V8 VRADA_2V8
1 30
GNDTX NC9
2 29
NC1 LNA1_OUT
3 28
NC2 NC8
C225 5.6p
4 27
TX_1 U204 LNA1_IN
5 26
NC3 NC7
6 25
VCCLOTX NC6
7 24
TXIA VCCLORX
8 23
TXIB RF3100_OM6195HN NC5
9 22
VDD
TXQA
10 21
TXQB TST
R206 200
RF_CTRL_DATA WRX_Q_N
R207 200
RF_CTRL_CLK WRX_Q_P
R208 200
RF_CTRL_STRB WRX_I_N
R209 200
C230 5.6p
WCLK WRX_I_P
4 5 6
VBAT
WTX_BAND_1
WPA_VCC
WDCDC_EN
C202 C203
10u 0.01u
VRADA_2V8
C215 C216
0.1u 10p
R203
WPOW_SENSE
220
WRX_BAND_1
22p
L205 C227
4.7nH
L206
NA
FL203 SAYZY1G95EB0B00
2 7
ANT RX
5
TX
1 3
GND1 GND6
4 6
GND2 GND5
8 9
GND3 GND4
7 8 9
- 178 -
VCC_PA
U202
LM3208TL
L202
B1 A2
VDD SW
A1 3.3uH
PVIN
C3
FB
C2
VCON C213
B3
SGND 4.7u
C1 A3
EN PGND
U203 LMV221
R202
1 6
VDD OUT WPOW_DET
1K
2 5
RF_IN REF
3 4
GND EN WPOW_DET_EN
C220
33nF
WRF_BAND_1
WRX_BAND_1
WTX_BAND_1
10 11 12
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Only for training and service purposes
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