LG D405 Service Manual page 29

+VPA_BATT0
TX_MODULE_TRX_1
TX_MODULE_TRX_2
TX_MODULE_TRX_4
C1145 3.9p
WTR_TX1_OUT
Check TP1~7 (High Level)
Check the ANT Logic in each mode
LGE Internal Use Only
TP8
C1110
4.7u
for W7 CI (06/07)
SPDT_SEL
TP1
ANT0_SW_SEL_0
ANT0_SW_SEL_1
TP2
Schematic of the Antenna Switch Block
1.4V < Voltage < 3.0V
Yes
GND15 GND10
22 12
GND16 GND9
23 11
TRX1 GND8
24 10
GND17 GND7
EAT62073401
25 9
TRX2 GND6
26 SKY77573-31 8
GND18 GND5
27 7
U1100
TRX3 GND4
28 6
GND19 VCC2
29 5
TRX4 VCC1
30 4
GND20 GND3
31 3
VBATT GND2
32 2
NC1 GND1
33 1
TP6
TP3 TP4
TP5
No
Check the TP8,9
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3. TROUBLE SHOOTING
RX_G1800
L1138 2n
RX_G1900
L1139 2n
TP9
PA0_R_1
PA0_R_0
ANT0_SW_SEL_3
ANT0_SW_SEL_2
TP7
Only for training and service purposes
+VPA_BATT0