LG LG-D618 - Multimedia; Picture and Video Management

3. TROUBLE SHOOTING
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Copyright © 2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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
Schematic of GSM(850/900)/DCS/PCS Tx Block
R1100
1.8n
DNI
R1101
R1102
DNI
4.7uC1110
C1111 10u
10uC1113
L1101
0.5p
22pC1115
+VPA_BATT0
22pC1116
+VPA_BATT0
DNIL1105
22pC1117
C1118 22p
22pC1119
C1109 22p
C1114
10n
100pC1101
SKY77573-31
U1100
SKY77573-31
TRX1
24
GND3
3
VCC1
4
VCC2
5
GND4
6
GND17
25
GND1
1
GND11
13
GND14
17
GND13
16
GND12
14
GND9
11
GND8
10
GND6
8
RX1
18
GND2
2
ANT
15
SPDT_IN
19
SPDT_OUT
21
RX2
20
GND5
7
GND10
12
GND7
9
GND15
22
GND16
23
NC1
33
VBATT
32
GND20
31
TRX4
30
GND19
29
TRX3
28
GND18
27
TRX2
26
NC2
34
RF_IN
36
SPDT
35
SW0
38
SW1
37
HB_EN
39
LB_EN
40
MODE0
41
MODE1
42
PGND
43
1.5nC1102
C1112
100p
22pC1120 22pC1121
2.2nC1100
C1176
33p
100pC1173
DNIL1106
L1147
DNI
C1103 3.3n
L1148
100n
SW1101
43
2
1
ANT
COMMON
G3 G4
PA0_R_1
PA0_R_0
SPDT_SEL
ANT0_SW_SEL_0
ANT0_SW_SEL_1 ANT0_SW_SEL_2
ANT0_SW_SEL_3
WTR_TX1_OUT
TX_MODULE_TRX_2
TX_MODULE_TRX_4
TX_MODULE_TRX_1
ANT_PATTERN
TX_MODULE_TRX_3
for W7 CI (06/07)
RX_G1900
RX_G1800
W7
for W7 CI (06/07)
TP2
TP1