Samsung SPH-A900 - Page 43

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Flow Chart of Troubleshooting
7-15
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C429
C434
L502
V_SYNTH
C413
C419
C421
C411
R400
2
2
3
3
C420
ANT401
1
1
V_RFTX
C428
C409
V_RFTX
L503
L408
C401
C424
C444
C417
C436
RFOUT
1
VCC1 VCC2
10
4
VCONT VREF
5
C408
3
GND
9
GND
7
GND GND
6
11
GND
RFIN
2
8
WS1413
R406
L403
R407
C402
C438
C423
C439
C433
C418
C431
C426
24
GND2
IN
1
OUT
3
C442
C435
F401
GND1
C406
V_RFTX
C430
L405
C410
2
GND1 GND2
4
1
IN
3
OUT
1
G
4
F403
RFS400
2
A
C
3
G
100nF C440
C425
C403
5
GND
9
GND
RFIN
2
RFOUT
7
1
VCC1
8
VCC2
3
VCONT VREF
4
PAM403
GND
6
L406
C422
R408
R401
C404
R403
R405
L400
3
ANT
GND
4
RX
2
TX
1
C400
DUF400
2
5 6
3 1
4
L407
TR400
C412
R402
C432
V1
9
6
V
2
1
V3
7
NC
N
C
10
N
C
1214
N
C
N
C
15
8
RF1
5
R
F
2
2
RF3
U401
11
A
N
T
G
N
D
13
NC
3
4
N
C
R404
TR401
2
5 6
3 1
4
V_SYNTH
V
D
D A
3
2
39
V
D
D A
3
9
40
V
D
D
A 4 0
7
VDDA7
1
VDDM
C437
14
V D
D
A
1
4
16
V
D
D A
1 6
17
V
D
D A
1
7
22
VDDA22
24
VDDA24
26
VDDA26
28
VDDA28
31
VDDA31
32
3
SBCK
4
SBDT
5
SBST
8
TCXO
10
TX_CP
30
VCNTL
12
V
D
D A
1 2
13
V
D
D A
1 3
N
C
20
N
C
21
NC
2
PA_ON
25
P_OUTA
27
P_OUTB
19
R
X
_
C
P
15
R
X
_
L O
I
R E
F
36 I
_
I
N
35
I
_
I
P
34
I
_ Q N
33
I
_
Q
P
6
LOCK
9
NC
11
NC
18
U402
38
B
I
A
S
23
C_OUT
41
G N
D
42
G N
D
43
G N
D
29
GND
37
C441
L404
G
9
12
5
RX
11
TX
C443
1
G
1
G
2
23
G
3
G
4
46
G
5
G
6
79
G
7
10
G
8
DUF402
ANT
8
C445
C407
VPD
PA_ON_PCS
PCS_RX
GPS_RX
GPS_MODE
A
N
T
PCS_MODE
CDMA_MODE
DAC_REF
TX_I_N
TX_I_P
TX_Q_N
TX_Q_P
CP_RX
U
H
F
_
L
O
_
B
U
F
F
PA_R1
PA_ON_CELL
V_BAT
CELL_RX
SYNTH_LOCK
AUX_SBI_CK
AUX_SBI_DT
AUX_SBI_ST
TX_ON
TCXO
TX_AGC_ADJ