LG LG-E410 - Page 57

4. TROUBLE SHOOTING
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Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Set the phone Rx is On
Check RF Switch (M/S)
No
Yes
Change the board
Check TP1 Signal exist ?
Check TP2 Signal exist ?
Check Tx Module
Refer to 4.4
No
Yes
Schematic of GSM/DCS/PCS Rx Block
DNI
C1005
HJ-ICT-06Y
ANT1005
1
C1001
12p
C1010
100p
SW1000
43
21
ANT COMMON
G3 G4
C1128
DNI
1
2
C1003
DNI
L1001
15n
DNI
C1004
HJ-ICT-06Y
ANT1002
1
C1002
6.8p
3.3n
C1007
L1002
2n
C1127
1.2p
7.5nC1040
DNI
L1003
2
15n
L1005
C1028 7.5n
DNI
L1006
1.2nC1024
1.2nC1022
L1004
4.7n
FL1002
4
3
2
1
5 10
6
7
8
9
GSM1900_Bal_OUT2
GSM1900_Bal_OUT1
GSM1800_Bal_OUT2
GSM1800_Bal_OUT1
GND5GND4
GSM1800/1900_IN
GND1
GND2
GND3
L1007
DNI
C104110p
10pC1048
15n
L1008
10n
L1012
L1035 8.2n
8.2nL1036
DNI
L1013
R1002
2.2K
U1001
16
15
14 13 12 11 10
17
9
8
7
6
4
3
28
1
44
43
42
41
40
39
38
37 36 35
32
33
34
24 23
22
29
30
31
18
21
25
20
26
19
27
5
2
GND2
GND5
GND13
TRX1
ANT
TRX2
GND12
TRX3
VRAMP
PGND3
PGND2
PGND1
GND10
TRX4
GND11
PGND6
PGND5
PGND4
PGND7 PGND8
PGND9
PGND10
PGND11
PGND12
PGND13
PGND14
PGND15
PGND16
GND1
GND14
GND3
GND4
GND6
GND7
GND8
TX_HB_IN
TXEN
TX_LB_IN BS2 BS1 VBATT VCC
GND9
MODE
8.2n
L1009
2
1
100p
C1046
1.2nC1013
FL1001
4
3
2
1
5 10
6
7
8
9
GSM900_Bal_OUT2
GSM900_Bal_OUT1
GSM850_Bal_OUT2
GSM850_Bal_OUT1
GND5GND4
GSM850/900_IN
GND1
GND2
GND3
GSM_PA_RAMP
RX_PCS_P
RX_PCS_M
RX_DCS_M
RX_GSM_900_P
RX_GSM_900_M
RX_GSM_850_P
RX_GSM_850_M
GPS_IN
W1900_W2100_RTX
W850_W900_RTX
RX_DCS_P
GSM(925-960 MHz)
DCS(1805-1880 MHz)
PCS(1930-1990 MHz)
GSM(869-894 MHz)
TP2
TP1