Samsung SGH-G810 Servise Manual page 68

Flow Chart of Troubleshooting
C127 C128 TA129
10V 50V
10V
26
VBATT
10
WCDMA1
UMTS_ANT
21
DCS|PCS_IN
23
GSM_IN
27
BS2
GSM_ANT_SEL1
28
BS1
GSM_ANT_SEL0
29
C147 C148
R122
GSM_PA_PWR_CTL
C183
1
VDDA2
2
CXO TCXO
3
VDDA1
4
VDDA1
5
C126
VTUNE1
6
VDDA1
7
VDDA2
8
VDDA2
9
VTUNE_GPS
C130 10
VDDA1
11
_Q_P PRX_QP
12
_Q_N PRX_QN
13
X_I_N PRX_IN
14
X_I_P PRX_IP
15
_Q_P DRX_QP
16
_Q_N DRX_QN
17
X_I_P DRX_IP
X_I_N
C119
L102
FEM100
ANT 4
RX4
5
RX3
6
RX2
7
RX1
2
MODE
3
RSVD
1
_TXEN
25
R114
C162
GCELL_INN
GCELL_INP
EGSM_INN
EGSM_INP
DCS_INN
DCS_INP
GPCS_INN
U100
GPCS_INP
VDDA2
GPS_IN
WDRXLB
WDRXHB1
WDRXHB2
WPRXSE1
VDDA2
WPRXSE2
WPRXSE1_OUT
C152
25V
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L101 C103
C125
F103
C187
OUT
1
IN
OUT
G G
C185 L124
2 5
L122
F101
2 3 510
G G G G
OUT2 6
4 IN2
BAL2 7
OUT1
8
IN1
1
BAL1 9
C186
L123
C113
C114
C115
C198
51 C101
50
49
GSM_RX_N
48
GSM_RX_P
47
DCS_RX_N
46
DCS_RX_P
45
PCS_RX_N
44
PCS_RX_P
43
42
GPS_PLNA_IN
41
C132
40 C133
39
38 C138
37
36
UMTS_RX
35
C146
C153
L109
R115
25V
VREG_MSMP_2.6V
10-54
4
4
3 3
2
L100
2
1
1
L111
3
4
L112 L113
L114
L131
L103
L104
L132
L128
L106
L107
L129
GSM ANT SEL2
UMTS_TX
DCS1800_PCS1900_TX
GSM900_TX
PWR_DET
2 5
G G
OUT
4
IN
1
OUT
3
F109
4
4
3
3
2
2
1
1
C134
GSM_RX_N
GSM_RX_P
DCS_RX_N
DCS_RX_P
PCS_RX_N
PCS_RX_P
C144
C149