Samsung SGH-M300 Service Manual page 37

C101 3
GSM_LNA_IN_N
4
L102
C106
GSM_LNA_IN_P
3
C113
DCS_LNA_IN_N
4
L108
C116
DCS_LNA_IN_P
C117 3
PCS_LNA_IN_N
4
L109
C120
PCS_LNA_IN_P
DPCS_PAM_IN
VBAT
TX_PWR
TX_EN
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F100
OUT
1
OUT
IN
G G
C103
5 2
F101
OUT
1
OUT IN
G G
C115
5 2
F102
OUT
1
OUT
IN
G G
C118
5 2
21 GND5
U100
19 GND4
17 GND3
15 GND2
GND1
13
C126
C127
R106
C128 C129
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L103
L104
L105
C111
C112
VCC2
L110
VCC1
V1
C124
C125
C130 C131 C132
3-22
Flow Chart of Troubleshooting
RFS101
R110
R109
C109
C107
GSM_PAM_IN
VMOD_EN
BAND_SEL2
BAND_SEL1
ANT101
1
1
2
2
3
3
4
4
5
5
6
6
ANT
ANT102
1
1
2
2
3
3
4
4
5
5
6
6