5-26
SGH-N500 Flow Chart of Troubleshooting and Circuit Diagrams
H
H
L
VC1 : GSM TX
Antenna S/W Control Circuit
L
L
VC2
VC2 : DCS TX
L
Tx(GSM)
VC1
Tx(DCS)
RX
C244
39PF
33PF
C263
15
IN2-
8
ModeSW
10
PS
12
RFin1
13
RFin2
1
VAPC1
16
VAPC2
4
VCC1
9
VCC2
FP100
HD155173ANP
U611
7
AMP0
AMPIB
6
5
DACin
14
GND1
11
GND2
3
IN+
2
IN-
R734 NC
G
1
G
4
10K
R241
CN1
KMS-157
A
2
C
3
120
R667
22K,1%
R626
C269
27PF
U625
1
C.OUT
GND
2
4
IN
OUT
3
R681
150
DCS214E-0897
L597
10UF/6.3V
C145
12nH
C655 180PF
R733 0
82
R665
33nH
L409
R624
68
R680
10K,1%
R618
1.8K
C774
27PF
3
1
R679
68
U209
DTC114YE
2
1NF
R238 10K
C264
33PF
C720
L612
33nH
C267
27PF
C237
22PF
2
5
6
3
1
4
RN4985
U493
100PF
L596 3.3nH
L408
33nH
C658
U624
1
C.OUT
GND
2
4
IN
OUT
3
C270
1NF
DCS214E-1747
C713 47PF
100PF
C144
27PF
C764
C249 220UF
R651 10K
C657 120PF
C665 27PF
C664 33PF
4
R617
10K,1%
U492
RN4985
2
5
6
3
1
G
9
G
12
G
10
GSM_RX
5
GSM_TX
2
VC1
VC2
11
ANT
8
DCS_RX
1
DCS_TX
3
G
46
G
7
RN4985
U204
2
5
6
3
1
4
LMG002S-5008B
U203
5
POUTDCS
POUTGSM
4
2
VAPC
VCTL
7
3
VDD1
VDD2
6
11
G3
G4
12
13G5
G6
14
15G7
G8
16
17G9
1
GSM
PF08122B-10-TB
U476
DCS
8
9G1
G10
18
G2
10
82
R666
10K
R240
C143
270PF
C585
33PF
VC2
VC1
3VTXEN2
VC2
+VBATT
VC2
GSMTX
DCSTX
3VTXEN1
DCSRX
TXPOWER
GSMRX
3VTX
TXEN2
3VBANDSEL
VC1