Samsung SGH-2400, Service Manual, Page: 28 / 41

5-4 Schematic Diagrams
5-4 Receiver
R360 SOT
(1608)
(1608)
(3216)
COIL CRAFT : L300,L301,L303,L320
(1608)
(1608)
(1608)
Coilcraft
NOTE
(1608)
+3VDC
C365
R306 180
R357
10uF
330
MI
11 12
MIX
MO
5 6
MOX
STB
13
7
VCC
+3VLNAGSM
100pF C368
U300
AI
2
AO
15
AREF
1
GC
16
3
GND1
4
GND2
GND3
14
10
GND4
LO
9 8
LOX
1.2pF
MIXER
R300 20K
C349
1
2
3 4
6
+3VDC
+3VLNADCS
1nF
C311
U303
UMC5N
15pF
C316
1
2
3 4
6
R354 3.3K
U302
UMC5N
C358
1nF C379
SOT L311
100nF
100pF C362
C380
C317 9pF
6pF
C300
NC
100nF C363
4pF
4pF
C377
C350
10nF
+3VDC
1K_1%
C359
2pF
R313
L303 56nH
C346
REXT
Vs
4.7K R351
U307
BCR400
CONTR
GND
+3VDC
22nH L328
C304 470pF
51 R364
0.5pF C313
Q300 BFP405
22nH
C352 1nF
R303
L329
R355
1K_1%
C378
332_1%
SOT
22pF
R304
C370
18
100pF C318
C305 22pF
C360 10nF
L301 56nH
100pF C337
470pF
C357
1nF C371
330
R365
6pF
C307
100nF
C372
C325 39pF
51
L323 18nH
100pF
R305
L324
C303
6.8nH
L325
22nH
47K
R353
L319 3.9nH
+3VLNAGSM
L326 5.6nH
C353
C330 22pF
4pF
4.3K R301
C376
1nF
C351
22pF
L318 2.2nH
1nF
C375
C341 1.8pF
C356 1nF
33pF C302
R326 0
R317 180
+3VDEMOD
C354 1nF
33pF C319
L300 82nH
12pF C310
GND2
4
GND3
6
GND4
IN
2
OUT
5
6pF
C315
MI MIX
12
MO
5
MOX
6 13
STB
VCC
7
B4703 FILTER
F301
1
GND1
3
MIXER
U305
2
AI
15
AO
1
AREF
16
GC
GND1
3
GND2
41
4
GND3
GND4
10
9
LO
LOX
8 11
L305 8.2nH SOT C369
180
0
R312
R311
0
R361
33pF
C306
+3VLNADCS
C374 22pF
R363 10K
C367 SOT
7
OUT-R
8
12nH
L308
F300 B4818
10
COIL
GND1
3
GND2
4
GND3
6
GND4
9
GND5
12
IN
1
IN-R
2
OUT
FILTER
B4693
F304
GND
1
GND1
3
GND2
4
GND3
5
GND4
7
GND5
8
IN
2
6
OUT
FILTER
L321 33nH
R359 SOT
47K
R352
10pF C348
C321 4pF
1uF C364
10nH L327
L320 39nH
R362 160
C373
1nF
18
LOIP
4 8
MXOP
3
PRUP
17
QOUT
RFHI
6 5
RFLO VMID
9
VPS1
20
VPS2
16
+3VDEMOD
L306 3.9nH
U301
COM1
2
13
COM2
15
DMIP
1
FDIN
19
FLTR
GAIN-RS
12
7
GREF
10
IFHI
11
IFLO IFOP
14
IOUT
F302
GND1
1
GND2
3
GND3
4
GND4
6
IN
2
5
OUT
DEMODULATOR
FAR-F5CH-942M50-L2KM
FILTER
C339 7pF
GND6
10
GND7
11
GND8
12
GND9
1I
N
OUT
8
C333 10nF
F303
FILTER
GND
2
3
GND1
13
GND10
14
GND11
4
GND2
5
GND3
6
GND4
GND5
7
9
C342 2.2pF
CFECS13.0ME23-TC
F305
FILTER
13MHz
2
GND
5
1
IN
NC
36
OUT
4
1nF C361
2.7K
R309
180 R316
R356
7pF C314
330
L302 100nH
33nH L322
10
R308
2.7nH
L307
L309 6.8nH
L310 8.2nH
RXL02
VAGC
RXEN_FEGSM
VMID
+3VLNAGSM
+3VLNADCS
+3VDC
+3VDEMOD RXL01GSM
RXL01DCS
QRXP IRXP
RXGSMIN
RXEN_FEDCS
RXDCSIN
DEMODEN RXL03