LG D405 Service Manual page 59

3.6.1 Checking TCXO Block
Refer to 3.3
3.6.2 Checking Tx module Block
Refer to 3.4
3.6.3 Checking RF TX level
G1
G2 ANT
SW1100
VREG_L6_1V8
+VPA_BATT0
TX_MODULE_TRX_1
TX_MODULE_TRX_2
TX_MODULE_TRX_4
TP2
C1145 3.9p
WTR_TX1_OUT
LGE Internal Use Only
SW101
C1160 100p
ANT
1
R1109
750KTOL=0.01
C1163
100p
WTR_PRX_LB_2_IN
22
23
24
25
26
27
28
29
30
31
32
33
C1110
4.7u
for W7 CI (06/07)
SPDT_SEL
ANT0_SW_SEL_0
ANT0_SW_SEL_1
Schematic of GSM(850/900)/DCS/PCS Tx Block
C1165
2
COMMON
G3 G4
3 4
R1107
TP1
4.7K
RADIATION_PWR_ANT
C1164
100p
L1140
C1106 100p
15n
SWAP the RX Filter
RX_G1800
RX_G1900
GND15 GND10
12
GND16 GND9
11
TRX1 GND8
10
GND17 GND7
EAT62073401
9
TRX2 GND6
SKY77573-31 8
GND18 GND5
7
U1100
TRX3 GND4
6
GND19 VCC2
5
TRX4 VCC1
4
GND20 GND3
3
VBATT GND2
2
NC1 GND1
1
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3. TROUBLE SHOOTING
L1102
100p
1.2n
L1148
27n
5 3 2
C1107 100p
G3 G2 G1
OUT IN
4 1
FL1101
881.5MHz
G850
EAM62732801
G900
EAM62732901
L1138 2n
L1139 2n
+VPA_BATT0
PA0_R_1
PA0_R_0
ANT0_SW_SEL_3
ANT0_SW_SEL_2
Only for training and service purposes
C1101
18p
L1101
100n
C1108 100p