LG -E435 Service Manual page 46

WCDMA DUAL
C1085 8.2p
W1900_W2100_RTX
L1021
3.9n
C1111 33p
W850_W900_RTX
C1112
L1033
DNI
5.6n
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 2n
C1076
DNI
FL1006
6 1
ANT RX
L1022 10p
3
TX
L1020
DNI 2 9
GND1 GND6
4 8 C1089 C1091
GND2 GND5
DNI 0.75p
5 7
GND3 GND4
1950MHz,2140MHz
Band I
PDET_IN
TP3
L1029 3.3p
RX_WCDMA_900_P
C1103
C1104
DNI 6.8n
L1031 3.3p
FL1007
6 1
ANT RX1
8
RX2
L1034 3.9p
3
TX
2
GND1
4 9
GND2 GND5
C1117
5 7
C1116
GND3 GND4
27n
8.2n
Band VIII
RX_WCDMA_HB
L1016
3.6n
VBAT
C1081 C1082
U1002
2.2u 330p
11
PGND
10
VCC VBAT
9
RF_OUT RF_IN
8
CPL_IN VMODE1
7
GND VMODE0
6
CPL_OUT VEN
REV_1.1
R1017
51
R1019
R1018
8dB
110 110
TP2
VBAT
C1096 C1097
2.2u 680p
U1003
11
PGND
10 1
VCC VBAT
9 2
RF_OUT RF_IN
8 3
CPL_IN VMODE1
7 4
GND VMODE0
6 5
CPL_OUT VEN
RX_WCDMA_900_M
REV_1.1
Yes
Yes
Check MSM7225A
Yes
- 46 - Copyright © 2013 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
C1080
Close to pin1
330p
1950MHz
C1087 3.3n
1 FL1004
L1023 4.7n
2 4 1
OUT IN
3 G3 G2 G1
3G_PAM_MODE
4 5 3 2
PA_R0
5
C1090
PA_ON0
0.5p
C1093 C1094
DNI DNI
TP1
C1095
680p
897.5MHz
FL1008 L1102 12n
C1101 4.7n
4 1
OUT IN
G3 G2 G1
3G_PAM_MODE
5 3 2
PA_R0
C1107
PA_ON1
DNI
C1109
C1110
DNI DNI
RF Tx Level is OK
Check RTR6285A
Only for training and service purposes
W1900_W2100_TX_OUT
C1088
DNI
W850_W900_TX_OUT
C1108
DNI