LG LG-D855 - Phone Software Update; Updating Software from the Internet; Over-the-Air (OTA) Software Update

3. TROUBLE SHOOTING
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Only for training and service purposes
LGE Internal Use Only
3.7.1.11 Checking RF SP2T Switch (B28 A/B)
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TP2
TP1
FL1655
FL1752
100p
L1822
100p
C1844
1n
C1843
FL1752
5
2
6
4
3
1
VDD
GND
PORT2
ANT
PORT1
VCTL
+2V7_VREG_L16
L1855
22n
C1840
DNI
GRFC_2
PRX_B28B
WTR_B28_PRX_LB4
PRX_B28A
PORT 1
CTRLVDD
H
H
PORT 2
B28A_B PRX
H L
TP2
TP1