Samsung SGH-S300 Service Manual page 25

SGH-S300 Fl ow Chart of Troubl eshooti ng and Ci rcui t Di agram s
1
A
B
C
C1038
10N F
D
TX_BAND_SEL
C1026
270PF
TXPOWE R
E
F
12
2 3
VBA T VPA C
C1043 C1045
C1044
3.3U F
100U F 3.3U F
6.3 V 6.3V
6.3V
TX_E N
L100 7
33nH
C1016
33PF U1001
10 8 12
21
BAND
DCSIN
3 7
TXEN GSMI N
4 11
VBAT T
PCSOUT
5 9
R1038 VREG
GSMOUT
6
VRAMP
100K GND
13
R1037
C1027
NC 1N F
3
SAMSUNG Proprietary-Contents may change without notice
4 56
F1002
13
ANT
11 VC 1
GSM_TX_EN
9 VC 2
DCS_TX_EN
5V C3
PCS_RX_EN
8 DCS/PCST X
10 EGSMTX
G
G GG
7 12 14 15
C100 3
0.5PF
C100 6
NC
R1014
10
DPCS_PAM_IN
R1016 R101 5
820 82 0
L101 4
L1011
R1010
1n H
6.8PF
15
GSM_PAM_I N
R101 1
R1012
22 0 L101 2
270
NC
L1013
15n H
TRANSMITTER & RECEIVER
Changed by
user12
4 5
6-22
7
4
4
CN1001
3
C1012
2
33PF 2
3 1
I N OUT
1
1
GND GND
2 4
L101 5
C100 2
8.2nH
0.75P F
C100 7
0.75PF
L1001
C101 1
27n H
0.75PF
C1014
EGSMRX 0.75PF
1
EGSMRX
2
DCSRX L100 2
3
C101 7
DCSRX 7.5nH
4
0.75PF
PCSR X 6
F100 5
G
C1015
16
1.2PF
4
OUT 1
2
I N
6
L1006
OUT2
C1019
6.8n H
G 1 G 2 G 3
1.2PF
1 35
Engineer
SEOY H
Drawn by
SEOY H
R&D CH K
TITLE :
DOC CTRL CH K
MFG ENGR CH K
Date Changed Time Changed QA CH K REV
2002.11.1 3
6:04:13 pm
6 7
8
A
ANT 1
3
B
GSM_LNA_IN_N
GSM_LNA_IN_P
DCS_LNA_IN_N
C
DCS_LNA_IN_P
PCS_LNA_IN_N
PCS_LNA_IN_P
D
E
COMPANY NAME
Address
F
City
Size
A3
SGH-S30 0
Drawing Numbe r
Shee t of
10 10
8