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Flow Chart of Troubleshooting and Circuit Diagrams
5-24
VC1
TX (GSM)
TX (DCS)
RX
H
H
L
L
L
Antenna S/W Control Circuit
VC1 : GSM TX
VC2 : DCS TX
SGH-T508_REV2.0
Title
Size
Date:
Model & VER.
VC2
Sheet
6 of 6
RF Part2
L
A4
NC
C604
C617
22PF
100PF
NC
L602
C607
NC
C690
12nH
L606
C605
NC
25
63
14
R608
100K,1%
BCR10PN
U603
100K,1%
R607
R603
R691
12K,1%
C613
27PF
0
C601
2
5
6
3
1
4
33PF
BCR10PN
U601
VRAMP
5
VREG
12K,1%
R690
GSMIN
GSMOUT
9
11
PCSOUT
3
TXEN
VBATT
4
10
VCC
VCC2
8
12
VCC2
6
U600
RF3110
BAND
2
DCSIN
1
13
GND
7
33nH
L605
IN
1
OUT
2
NC
L603
CN600
MHC-175
GND1
34
GND2
GND3
56
GND4
C608
1NF
C616
22PF
C602
100PF
2.7nH
L607
R604
10K,1%
33PF
C614
L604
33nH
33PF
C630
C611
27PF
10UF/6.3V
C603
7
G
9
12
GG
13
14
G
VC1
2
11
VC2
LMG002S-5047A
8
ANT
1
DCS_RX
3
DCS_TX
EGSM_RX
10
EGSM_TX
5
4
GG
6
G
25
63
14
U605
L601
HF201209
U602
BCR10PN
C600
*
C612
33PF
6.3V
100UF
A500
_BANDSEL
BANDSEL
C615
27PF
DCSTX
TXPOWER
GSMTX
+VBATT
VC1
TXEN
3VRF
DCSRX
GSMRX
VC1
VC2
VC2
VC1
3VRF
TXEN