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2.7n
W1900_W2100_RTX
C1085
L1020
L1021
1.8n
1.2p
WCDMA DUAL
FL1007
C1111
6
W850_W900_RTX
ANT
1.8n
C1112
L1033
5.6n
0.5p
2
GND1
4
GND2
5
GND3
Band V
Set the phone Tx is ON and
PDM is 210
Check TP3 Over 21dBm?
No
Check TP2 PA_R0 ≥ 2.6V
No
Check TP1 Over 10 dBm?
No
Change the board
LGE Internal Use Only
L1015
2.4n
L1016
C1076
12n
1.8p
FL1006
6
1
ANT
RX
3
TX
2
9
GND1
GND6
C1091
4
8
C1089
GND2
GND5
1p
5
7
10n
GND3
GND4
Band II
PDET_IN
TP3
R1018
110
VBAT
2.7p
RX_WCDMA_900_P
L1029
C1103
C1104
DNI
15n
2.7p
RX_WCDMA_900_M
L1031
1
RX1
8
RX2
L1034
3
TX
3.9n
9
GND5
C1116
DNI
7
GND4
1.2p
C1117
RX_WCDMA_HB
VBAT
C1081
C1082
U1002
2.2u
330p
11
PGND
10
1
VCC2
VCC1
9
2
RFOUT
RFIN
8
3
CPL_IN
VMODE_1
7
4
GND
VMODE_0
6
5
CPL_OUT
VEN
R1017
TP2
51
R1019
8dB
110
2
C1096
C1097
2.2u
680p
1
U1003
11
PGND
10
1
VCC2
VCC1
9
2
RFOUT
RFIN
8
3
CPL_IN
VMODE_1
7
4
GND
VMODE_0
6
5
CPL_OUT
VEN
C1109
100p
Yes
Yes
Check MSM7225A
Yes
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3. TROUBLE SHOOTING
C1080
Close to pin1
330p
FL1004
22
22
4
1
OUT
IN
G3
G2
G1
L1023
3G_PAM_MODE
C1087
5
3
2
PA_R0
C1200
PA_ON0
DNI
C1090
100
C1093
C1094
100p
100p
TP1
C1095
4dB attunation
680p
R1020
22
FL1008
L1102
33p
C1101 1n
4
1
OUT
IN
G3
G2
G1
3G_PAM_MODE
5
3
2
PA_R0
DNI C1107
PA_ON1
C1110
100p
RF Tx Level is OK
Check RTR6285A
Only for training and service purposes
W1900_W2100_TX_OUT
C1088
100
W850_W900_TX_OUT
C1108
DNI
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Table of Contents
Troubleshooting
