LG -E615 Service Manual page 40

DNI
C1058
EXT_LNA_EN
U1003
C1059 10p 1 6
RFIN RFOUT
2 5
EN RREF
L1020
3 4
2n
GS VCC
7
C1062
100p
C1074
WCDMA_HB_RTX
2.7p
L1026
3.3n
W900 Tx (880-915MHz)
[Duplexer]
BC 1 B7697 SDMY0003001
BC 2 ACMD-7407 SDPY0004701
BC 5 B7671 SDDY0005101
BC 8 B7953 SDMY0002801
W900
FL1008
6
L1041
ANT RX1
RX2
WCDMA_LB_RTX
39p
TX
2
L1044 L1045
GND1
4
22n 6.2n
GND2 GND5
5
GND3 GND4
Set the phone Tx is On and
PDM is 210
Check TP3 Over 21dBm?
No
Check TP2 PA_RO ≥ 2.6V
No
Check TP1 Over 10 dBm?
No
Change the board
LGE Internal Use Only
6.8p L1016
27K C1065
R1017
C1038
100p
C1063
10n
VREG_TCXO_2.85V
W2100 Tx (1920-1980MHz)
FL1004
6 1
ANT RX
L1028
3
TX
L1027
2 9
1.8n GND1 GND6
4 8
8.2n
GND2 GND5
5 7
GND3 GND4 C1078
1950MHz,2140MHz
TP3
6dB Atten.
R1022
PDET_IN
43
R1023
180
L1031 10n
RX_WCDMA_900_P
L1032
12n
C1087 DNI
L1034 10n
RX_WCDMA_900_M
1
8
3
9
7
2.7p
L1046
WCDMA DUAL
DNI
RX_WCDMA_1900
RX_WCDMA_2100
C1067 C1068
10u 33p
U1004
11
PGND
10 1
1n
VCC2 VCC1
9 2
RFOUT RFIN
8 3
ISO NC
7 4
GND VMODE
6 5
C1080
CPL VEN
DNI
C1082
100p
R1024
180
C1084 C1085
10u 33p
U1005
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
R1021
18n
C1097
Yes
Yes
Yes
- 40 - Copyright © 2012 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
VBAT
C1070
1n
C1073
DNI
FL1005
C1076
L1029
4 1
OUT IN
3.3n G3 G2 G1
100p
5 3 2
PA_R0
C1079 1950MHz
PA_ON0
DNI
C1083
100p
TP1
TP2
VBAT
C1086
1n
FL1007
L1039 L1040
C1092
4 1
OUT IN
G3 G2 G1
1.5n 10n
6.8n
5 3 2
PA_R0
PA_ON1
L1043
3.3p
C1099
C1100
100p
100p
RF Tx Level is OK
Check MSM7225A
Check RTR6285A
Only for training and service purposes
C1077
WCDMA_2100_TX_OUT
2.7p
L1030
2.2n
C1093
WCDMA_900_TX_OUT
100p
L1042
39n