Samsung GT-i8910 Service Manual page 104

GSM_TX
R103
R104 R105
7
GSM_IN
DCS_PCS_TX DCS|PCS_IN
1
R106
④
R107 R108
TP_GSM_PA_BAND
GSM_PA_BAND
TP_GSM_PA_EN
GSM_PA_EN
TP_GSM_PA_PWR_CTL
GSM_PA_PWR_CTL
1
1
2 2
3
3
ANT102
TP_GSM_ANT_SEL0_N
GSM_ANT_SEL0_N
TP_GSM_ANT_SEL1_N
GSM_ANT_SEL1_N
TP_GSM_ANT_SEL2_N
GSM_ANT_SEL2_N
TP_GSM_ANT_SEL3_N
GSM_ANT_SEL3_N
8
GSM_OUT
DCS|PCS_OUT
9
③
PAM100
V_BAT
C134
TA100
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RFS100
1
1
2
2
G A C G
3
1 2 3 4
3
ANT101
①
C100
C101
L103
C102
L102
VREG_FEM_2.7V
C108
20
ANT
11
VDD
15
VC1
14
VC2
13 VC3
12
VC4
24
GSM850|900_TX
22 GSM1800|1900_TX
②
G G G G G
9 10 19 21 23 25
C123
L111
L110
C131
L113
L112
PIN15 : HIGH
PIN14 : LOW
PIN13 : LOW
PIN12 : LOW
9-67
Flow Chart of Troubleshooting
L100
L101
L104
L105
F100
L106
L107
1
GSM850_RX1
2
GSM850_RX2
3
C109
GSM900_RX1
GSM900_RX2 4
L108
GSM1800_RX1 5
GSM1800_RX2
6
C110
GSM1900_RX1 7
GSM1900_RX2 8
C114
UMTS_TRX1 16
UMTS_TRX2 17
18
UMTS_TRX3
L109
G G G G
C121
26 27 28
UMTS_1900_TRX
UMTS_900_TRX
UMTS_2100_TRX
GSM850_RXM
GSM850_RXP
GSM900_RXM
GSM900_RXP
DCS_RXM
DCS_RXP
PCS_RXM
PCS_RXP