LG -E977 Service Manual page 54

TX_ANT_U2100
TX_ANT_U850
TX_GSM_HB
TX_GSM_LB
PA_DET_MMMB
25
GND_SLUG
23
GND2 UMTS_HB_RF_IN
22
UMTS_HB_RF_OUT GSM_HB_RF_IN
21
GND4 HB_EN
20
UMTS_LB_RF_OUT VMODE0
19
GND6 VMODE1
18
U1002
VCC_UMTS MODE
ACPM-7251-TR1
17
VCC_GSM GND1
16
GND5 VBATT
15
GSM_HB_RF_OUT LB_EN
14
GND3 GSM_LB_RF_IN
13
GSM_LB_RF_OUT UMTS_LB_RF_IN
LGE Internal Use Only
C1102 1.2p
L1046
1.5n
TP2
L1049
0.5p
L1052
5.6n
L1053
L1054
+VSMPS
DNI
0.6p
L1059
2.2n
L1061
C1046
DNI
DNI
L1064
5.6n
L1065
C1064
1.5p
DNI
+VPWR
1
2
3
4
5
6
7
8
9
10
11
GSM(QUAD)_ U1/8(EU) MMMB
VBAT
TP3
1950MHz
L1042
2.2n
C1039 33p
PA_ON1_GSMHB
PA0_R0
PA0_R1
MMMB_MODE
PA_ON0_GSMLB
33p
C1042
L1060
DNI
C1062
6.8p
L1062
15n
- 54 - Copyright © 2013 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
PA_DET_MMMB
25
GND_SLUG
23
GND2
22
UMTS_HB_RF_OUT
21
GND4
20
UMTS_LB_RF_OUT
19
GND6
18
U1002
VCC_UMTS
ACPM-7251-TR1
17
VCC_GSM
16
GND5
15
GSM_HB_RF_OUT
14
GND3
13
GSM_LB_RF_OUT
FL1007
3
L1043
G3
4 1
OUT IN
G2 G1
2.7n
5 2
SAFEB1G95KA0F00
TX_OUT_GSM_HB
TX_OUT_GSM_LB
836.5MHz
5 FL1011
C1063
GND
4 1
OUT IN
G2 G1
9.1n
3 2
L1063
DNI
SAFEB836MAL0F00
Only for training and service purposes
1
UMTS_HB_RF_IN
2
GSM_HB_RF_IN
3
HB_EN
4
VMODE0
5
VMODE1
6
MODE
7
GND1
8
VBATT
9
LB_EN
10
GSM_LB_RF_IN
11
UMTS_LB_RF_IN
TX_OUT_U2100
TX_OUT_U850