Инструкции По Обслуживанию для Samsung SGH-R220
5-26
Flow Chart of Troubleshooting and Circuit Diagrams
Antenna S/W Control Circuit
L
L
Tx(GSM)
VC1
VC2
VC2 : DCS TX
L
Tx(DCS)
RX
H
H
L
VC1 : GSM TX
3.9nH
L599
C655
270PF
C270
1NF
10K,1%
R618
C658
100PF
C264
33PF
220UF
150
R667
2
5
6
3
1
4
C249
C145
RN4985
U204
L408
33nH
10UF/6.3V
1
4
U492
RN4985
2
5
6
3
33PF
C143
U209
DTC114YE
2
3
1
5.6K
R624
C713
27PF
100PF
C144
C665
27PF
33PF
C263
R724
51
270PF
C585
33nH
L409
10K
R240
3
1
4
68
R666
RN4985
U493
2
5
6
8.2nH
L597
22K,1%
R626
ANTENNA
A200
C269
27PF
10K
R241
C720
1NF
L596
3.9nH
C267
27PF
1PF
C747
C244
39PF
KMS-157
CN1
A
2
3
C
1
G
4
G
4PF
C538
6
G
7
G
9
GG
12
10
GSM_RX
5
GSM_TX
2
VC1
VC2
11
ES-A5010B
U203
ANT
8
DCS_RX
1
DCS_TX
3
G
4
C664
R617
10K,1%
33PF
6
GD
2
GD1
GI
1
GO
7
TM
4
68
R665
VCC2
U318
LDC15D190A0007A
8
CO
DI
3
DO
5
7
AMP0
AMPIB
6
5
DACin
14
GND1
11
GND2
3
IN+
2
IN-
15
IN2-
8
ModeSW
10
PS
12
RFin1
13
RFin2
1
VAPC1
16
VAPC2
4
VCC1
9
C657
120PF
HD155173ANP
U611
R651
10K
3
VDD1
VDD2
6
R238 10K
15
G7
G8
16
17
G9
1
GSM
5
POUTDCS
POUTGSM
4
2
VAPC
VCTL
7
DCS
8
9
G1
18
G10
G2
10
11
G3
G4
12
13
G5
G6
14
PF08122B
U476
C586
C237
22PF
GSMTX
27PF
3VTXEN1
3VTXEN2
VC1
VC2
+VBATT
DCSTX
VC2
DCSRX
TXPOWER
VC1
GSMRX
VC2
3VTX
TXEN2
3VBANDSEL