Samsung SGH-L770V, Service Manual

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Flow Chart of Troubleshooting
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10-33
FEM
C108
C120
L112
R102
R100
L103
C117 L110
C113
C116
C118
L106
VC1
14 VC2
13 VC3
VC4
12
VDD
11
1
2
GSM850_RX2
GSM850|900_TX
24
3
GSM900_RX1
GSM900_RX2
4
UMTS_TRX1 16
17 UMTS_TRX2
18
UMTS_TRX3
15
27
G G
28
5 GSM1800_RX1
6
GSM1800_RX2
22
GSM1800|1900_TX
GSM1900_RX1 7
GSM1900_RX2 8
GSM850_RX1
ANT
20
10
G G
9
G
19 21
G G
23 25
G G
26
F101
C112
R105
L105
C109
RFS100
A
2 3
C
1
G
4
G
R104
C107
L107
L111
C110
C114
L104
L108
R103
VREG_FEM_2.7V
R101
C119
2
ANT103
1
L109
C115
ANT_JTAG
PCS_RXM
PCS_RXP
DCS_RXM
DCS_RXP
GSM_ANT_SEL1_N
GSM_ANT_SEL2_N
GSM_RXP_900
GSM_RXM_900
GSM_ANT_SEL0_N
0
0
3
C
C301
C303
4
0
3
C
C305
6
0
3
C
7
0
3
C
9
0
3
C
8
0
3
C
C310
C311
C313
4
1
3
C
C315
6
1
3
C
7
1
3
C
C318
1
2
3
C
2
2
3
C
7
3
3
C
8
3
3
C
1
4
3
C
3
4
3
C
C501
3
0
5
C
4
0
5
C
5
0
5
C
8
0
5
C
C509
9
2
5
C
C530
3
3
5
C
5
3
5
C
6
3
5
C
C538
2
0
6
C
F60 0 F60 1 F60 4
9
0
6
C
P
F
GSM_PA_EN
HD C60 0
MODE300 MODE301
R302
R303
4
0
3
R
6
0
3
R
8
0
3
R
5
1
3
R
R319
0
2
3
R
0
0
5
R
6
0
5
R
R517
3
2
5
R
4
2
5
R
7
2
5
R
1
0
6
R
2
0
6
R
0
0
3
A
_
P
T
UCP300
MSM6260-NSP
C109 C113 C114
0
0
2
C
1
0
2
C
2
0
2
C
C203
4
0
2
C
5
0
2
C
C206
C207
C208
C209
0
1
2
C
C211
2
1
2
C
3
1
2
C
4
1
2
C
5
1
2
C
6
1
2
C
7
1
2
C
8
1
2
C
9
1
2
C
0
2
2
C
C221
C222
C223
C224
C225
C226
7
2
2
C
8
2
2
C
2
3
2
C
C233
4
3
2
C
5
3
2
C
6
3
2
C
7
3
2
C
9
3
2
C
8
4
2
C
9
4
2
C
0
0
2
F
FP
C60 6
L200
L201
L202
2
L
Q20 0
R103
R200
R202
1
1
2
R
TP200
U20 2
RT R62 80
F101