Samsung SCH-i830 Service Manual page 60

Flow Chart of Troubleshooting
CELL_OUT
PCS_AOUT
TX_AGC_ADJ
DAC_IREF
TX_Q_P
TX_Q_N
TX_I_P
TX_I_N
VREG_RFTX
C1149
SYNTH_LOCK
VREG_MSMP
F1101
C1128
1
PCS_AOUT IN OUT
GND1 GND2
C1132
2
VREG_RFTX
L1107
C1146 C1147
F1105
C1163
1 3
CELL_OUT IN OUT
GND1 GND2
24
C1167
R1114
C1126
C1138
48 47 46
52 51 50 49
53
NC
54 NC
C1140
1
TX_QN
2
TX_IP
3
TX_IN
4
VDDA
5
RX_Q_P RX_QP
6
RX_Q_N RX_QN
U1102
7
RX_I_P RX_IP
8
RX_I_N RX_IN
9
LOCK
10
SB_CK SBCK
11
SB_DT SBDT
12
SB_ST SBST
13
TX_ON RF_ON
14 15 16 17
R1125
L1119
VREG_RFTX
VREG_SYNT
C1172
C1174
C1177
C1178
PACONT
37
GG
G
4
C1127
VCONT
2
3 RFIN
C1135 1
4
3
4
C1141
5
PA_ON_PCS
2
VBAT
6
1
TR1100 L1111
TA1150
TR1101
3
4
PA_ON_CELL
5
2
C1155
C1156
6
1
5
C1165 VCC1
4
RFIN
2
PA_RANGE0 VCONT
R1124
GG
3 79
C1169
PACONT
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VREG_RFTX
C1124
C1130
C1131
C1133
C1134
45 44 43 42 41 40 39 38
37
TX_MOD_CP
36
VDDA
C1145
35
TX_VCO_IN
34
R1116
VDDA
33
DCS_INP
32
DCS_INN
31
VDDA
30
EGSM_INP
29
EGSM_INN
C1153
28
PLL2_VCO_IN
R1120
27
CP_HOLD2
26
FAQ2
25
CP2
18 19 20 21 22 23 24
L1117
VREG_TCXO
C1173
R1127
R1128
VREG_SYNT
TA1179
C1180
9 61 1
G
G
CPL1102
5
C1106
VREF
8
RFOUT
1
OUT
50OHM
10
PAM1103 L1122
C1137
CX77107
R1129
C1139
C1142 C1143
VREG_RFTX
R1117
L1109
1
ZD1100 2
R1118
C1148
R1119
C1154
C1157
C1158
PAM1104 R1130
CPL1106
CX77105
6 C1162
VCC2
8 1
RFOUT OUT
VREF 50OHM
1
GG G
10 11
L1118 C1168
7-34
MOD_CP
L1105 F1100
3 OUT
IN 1
4 OUT
L1106
TXVCO_IN G G
5 2
L1108
L1110
L1112
F1104
3
L1113
OUT
L1114
1
IN
OUT
4
UHF_LO_BUFF
G G
5 2
L1115
FAQ_RX
CP_RX0
L1103
C1125
F1103
3
C1129
ANT
2
1 2
IN TX RX
COUP
GND
4 3
4
R1115
FB
D1101
3
H_DET
C1151
FB
L1116
DUF1107
C1164
8
ANT
2 5
11
IN TX RX CELL_RX
COUP
43
11 2 34 67 9 10 12 3
R1126
C1144
DCSRX
C1152
EGSMRX
PCS_RX