Table of Contents
Advertisement
(2) Checking Mobile SW &TX Module
TP3
TP2
RF_ANT_SEL[0]
RF_TX_EN
RF_TX_RAMP
U101
TP1
Figure 4.2.4
RF_ANT_SEL[0]
RF_TX_EN
SW101
2
ANT_FEED
ANT
COMMON
1
G3
G4
3
4
TP1
LGE Internal Use Only
U101
RF_ANT_SEL[1]
RF_ANT_SEL[1]
RF_ANT_SEL[0]
RF_TX_RAMP
RF_TX_EN
TP4
TP2
TP1
TP3
SW101
RF_ANT_SEL[1]
RF_ANT_SEL[1]
RF_ANT_SEL[0]
R104
1K
RF_TX_RAMP
RF_TX_EN
C115
C116
C117
C105
39p
39p
39p
39p
2.2n
C109
L138
L139
C111
DNI
DNI
0.5p
DNI
L105
TP4
Figure 4.2.4
EGSM Rx
TP4
TP4
RF_TX_RAMP
GND8
15
VRAMP
16
TxEN
17
RSVD
U101
18
GSM850 / DCS
SKY77550-21
Rx1
19
RSVD3
20
EGSM / PCS
Rx2
21
GND7
22
TP3
L112
5.6n
FL101
1
U_P_1960/
B_P_1960/1842_5MHz_1
942_5MHz
B_P_1960/1842_5MHz_2
4
U_P_1842_5/
881_5MHz
B_P_942_5/881_5MHz_1
2
GND1
B_P_942_5/881_5MHz_2
3
GND2
5
GND3
GND4
- 65 -
Copyright © 01 LG Electronics. Inc. All right reserved.
SW101
4. TROUBLE SHOOTING
C101
R102
12
33p
C102
33p
L102
L103
DNI
DNI
C103
C104
GND6
DNI
8
VBAT
DNI
GND5
7
GND4
6
GND3
5
VBATT2
4
VBATT1
3
C106
C107
GND2
C108
2
GND1
33u
10n
15p
1
(10V,2012)
(16V,K,X7R)
(50V,J,NP0)
TP2
L106
1.8n
L108
DNI
8
L110
9
1.8n
6
7
L111
10n
10
C114
0.5p
L114
10n
Only for training and service purposes
RF_HB_TX
L101
RF_LB_TX
0
TP4
RF_HB_RXN
L109
0.75p
RF_HB_RXP
RF_LB_RXN
L113
DNI
RF_LB_RXP
Advertisement
Table of Contents
Troubleshooting
