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5-26
SGH-R225 Flow Chart of Troubleshooting and Circuit Diagrams
VC1 : GSM
TX
Antenna S/W Control Circuit
L
L
Tx(GSM)
VC1
VC2
VC2 : DCS
TX
L
5
POUTDCS
POUTGSM
4
2
V
APC
VCTL
7
3
VDD1
VDD2
6
Tx(DCS)
RX
H
H
L
11
G3
G4
12
13
G5
G6
14
15
G7
G8
16
17
G9
1
GSM
PF08123B
U476
DCS
8
9
G1
18
G10
G2
10
1NF
C270
270PF
C585
IN-
2
IN2-
15
ModeSW
8
PS
10
RFin1
12
RFin2
13
V
APC1
1
V
APC2
16
VCC1
4
VCC2
9
U61
1
HD155173ANP
AMP0
7
6
AMPIB
DACin
5
GND1
14
GND2
11
IN+
3
10K
R238
27PF
C267
10UF/6.3V
C145
100PF
C658
120PF
C657
ANTENNA
10K
R651
C249 220UF
A200
33nH
L408
2PF
C773
1
C664 33PF
DTC1
14YE
U209
2
3
G6
10
GSM_RX
5
GSM_TX
PCS_RX
1
3
PCS_TX
2
VC1
VC2
11
R626 22K,1%
U203
LMG002S-5029A
ANT
8
4
GG
1
67
G2
G3
9
12
G4
G5
13
14
100PF
C144
82
R628
R629
82
R618
10K,1%
L606
C143
2.2nH
2
5
6
3
1
4
33PF
R240
10K
RN4985
U492
C538
3PF
U493
RN4985
2
5
6
3
1
4
C661
47PF
120
R625
C244
39PF
C237
22PF
33PF
C263
27PF
C767
U623
1
C.OUT
GND
2
4
IN
OUT
3
1
C.OUT
GND
2
4
IN
OUT
3
DCS214A-1880
270
DCS214E-0897
U622
R681
R679
330
330
R680
27PF
C665
8.2nH
L597
1
4
L409
33nH
U204
RN4985
2
5
6
3
R624 5.6K
C713
27PF
L596 12nH
R241
10K
27PF
C269
270PF
C655
L599
5.6nH
27PF
C586
1NF
C720
C264
33PF
10K,1%
R617
CN1
KMS-157
2
A
C
3
G
1
G
4
PCSRX
GSMRX
+VBA
TT
VC2
3VTXEN1
3VTXEN2
GSMTX
TXPOWER
VC1
VC2
3VTXEN1
TXEN2
3VBANDSEL
VC1
VC2
PCSTX