3. TROUBLE SHOOTING
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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
4.7u
C1110
C1111
10u
10u
C1113
L110
1
0.5p
22
p
C1115
+VPA_BATT0
22
p
C1116
+VPA_BATT0
DNI
L1105
22
p
C1117
C1118
22p
22
p
C1119
C1109
22p
C1114
10n
100p
C1101
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
RX
1
18
GND2
2
AN
T
15
SPDT_IN
19
SPDT_OU
T
21
RX
2
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_I
N
36
SPD
T
35
SW
0
38
SW
1
37
HB_E
N
39
LB_E
N
40
MODE
0
41
MODE
1
42
PGND
43
1.5n
C1102
C1112
100p
22
p
C1120
22
p
C1121
2.2n
C1100
C1176
33p
100p
C1173
DNI
L1106
L1147
DNI
C1103
3.3n
L1148
100n
SW1101
4
3
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