Check Of Rf Signal Path (B40) - LG -D855 Service Manual

3.7.3.7 Checking RF signal path (B40)
TP1
C1845 C1823
ANT_TX_B40
4.7n
3.3n
LGE Internal Use Only
U1803
TP2
TP1
TP2
FL1801
C1818
4 1
OUT IN
G3 G2 G1
3.6n
5 3 2
<Main Top>
C1850
+VPA0
10n
U1803
RF7940
6
SCLK SDATA
7
GND VIO
8
NC VBATT
9
RF_OUT RF_IN
10
VCC2 VCC1
11
PGND
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3. TROUBLE SHOOTING
RFFE1_CLK
5
RFFE1_DATA
4
3
C1820
2
C1819 1.8p
2 1
1
100p
Only for training and service purposes
WTR_B40_TX_HB2