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Flow Chart of Troubleshooting
5-26
L
L
H
H
Tx(GSM)
Antenna S/W Control Circuit
L
L
2
5
VC3
VC2
RX
VC1 : GSM TX
VC1
BCR08PN
L
L
H
6
4
1
Tx(DCS)
3
VC2 : DCS TX
5.6nH
L320
22K
R326
G4
6
1
IN
2
OUT
C361
56PF
RFGND
J301
MHC-173
G1
3
4
G2
G3
5
2
B2
5
6
C1
C2
3
1
E1
E2
4
RFGND
3VTXEN1
BCR08PN
U309
B1
R364
82
R353
R346
12
R357
0
NC
100PF
RFGND
RFGND
C353
C386
RFGND
C351
100PF
1
3PF
12
DTC114YE
Q301
2
3
RFGND
RFGND
R365
RFGND
RFGND
IN
3
4
IN1
OUT
1
V+
5
V-
2
C406
220PF
U306
LM7131ACM5
L311
33nH
120,5%
R330
U314
BCR08PN
2
B1
5
B2
C1
6
3
C2
E1
1
4
E2
27PF
6.8nH
L326
RFGND
C394
10K
R332
R344
10K
DO
5
6
GD
2
GD1
GI
1
GO
7
TM
4
RFGND
U318
LDC15D190A0007A
8
CO
DI
3
100
R363
RFGND
R366
15
E2
RFGND
560
R324
U310
BCR08PN
2
B1
5
B2
C1
6
3
C2
E1
1
4
1NF
C382
33nH
L314
RFGND
RFGND
ANT301
3198.17
L325
33nH
1608
100PF
C404
C352
1.8NF
RFGND
C357
820PF
R335
15
33PF
C364
10NF
C402
RFGND
RFGND
RFGND
33PF
C334
RFGND
33PF
C377
C323
820PF
3VTXEN1
2.7K
R362
RFGND
3.9K,1%
R361
RFGND
NC
C372
0
R358
1.2K
R322
R329
1.8K
R318
27PF
C369
RFGND
680
R347
10K
1K
R327
8.2K
R321
VC1
VC2
14
11
VC3
100PF
C340
GG
81
0
GG
12
15
G
17
G
9
GSM_RX
7
GSM_TX
4
ANT
2
DCS_RX
16
DCS_TX
13
G
1
G
18
3
GG
56
560
RFGND
RFGND
SHS-L090DE
U304
RFGND
RFGND
R323
RFGND
RFGND
4
POUTGSM
2
VAPC
7
VCTL
VDD1
36
VDD2
51
R360
G5
13
14
G6
G7
15
16
G8
G9
17
PINDCS
8
PINGSM
1
POUTDCS
5
U312
PF08107B-TB
G1
9
18
G10
10
G2
G3
11
12
G4
NC
C385
RFGND
RFGND
RFGND
D301
HSMS-2805-L31
1
2
3
4
12K
R368
RFGND
C396
220UF
6.3V
3VTXEN1
+VBATT
TXEN2
3VBANDSEL
VC2
VC1
GSMTX
DCSRX
GSMRX
DCSTX
3VTX
RXEN1
VC1
TXPOWER
Summary of Contents for SGH-N300
Page 2: ...Samsung Electronics Co Ltd Printed in Korea 06 2001 Rev 1 0 GH68 02097A ELECTRONICS ...
Page 11: ...Exploded Views and Parts List 1 8 1 10 Desk Top Charger DESK TOP CHARGER GH44 00206A ...
Page 12: ...2 1 PCB Diagrams Schematic Diagrams 2 PCB Diagrams 2 1 Main Top ...
Page 13: ...2 2 PCB Diagrams Schematic Diagrams 2 2 Main Bottom ...
Page 41: ...Flow Chart of Troubleshooting 5 12 J101 SPK101 U110 PWO1P PWO1N SPK SPK 6 2 3 SPK SPK ...