Samsung SGH-V205 Service Manual page 40

SGH-V205 Flow Chart of Troubleshooting and Circuit Diagrams
21. Transmitter & Receiver Circuit Diagram
1
A
B
C
GSM_PAM_I N
DPCS_PAM_IN
D
E
F
1
2 3
ANT1
1
1
2
2
3
3
L1000
NC
L1004
18nH
R1000
18
R1001
R1002
R100 3 180
300
300
R1004
18
U1001
R1005
R1006 VBA T
R100 7
180
300
300
C1012
33PF
VCC2
VCC2
VCC
C1013
100U F
6.3V
TX_BAND_SEL
R1008
C1015 100K,1 %
33PF
TX_EN
C1016
33PF
2 3
SAMSUNG Proprietary-Contents may change without notice
4 56
CN1001
C100 1
C100 0
2.7n H
47PF
1 3
OUT IN
GND GND
4 2
C100 2
4.7n H
U1005
13
ANT
EGSMRX
11 VC1 1
GSM_TX_EN
EGSMRX 2
DCS_TX_EN 9 VC2
L1003
5 VC3 DCSRX 3
PCS_RX_EN
3.3n H
8 DCS/PCSTX DCSRX 4
10 EGSMTX PCSRX 6
G
GG G G
C1007
71 2 14 15 16
47PF
C1008
1P F
VPA C
C1014
1N F
TXPOWER
TRANSMITTER & RECEIVER
Changed by
user 8
456
6-22
78
C1003
0.75P F
GSM_LNA_IN_N
L100 1
C100 4
30nH
0.75PF
GSM_LNA_IN_P
C1005
0.75PF
DCS_LNA_IN_N
L1002
C1006
8.2nH
0.75PF
DCS_LNA_IN_P
C1017
10PF
F1003
C1009
0.75PF
4
2 OUT 1 PCS_LNA_IN_N
IN
6
L1006
OUT 2 C1010
7.5N H
G1 G2 G3
0.75PF
1 35 PCS_LNA_IN_P
Engineer
JD Yang
Drawn by
JD Yang
R&D CH K
DOC CTRL CH K
MFG ENGR CH
Date Changed Time Changed QA CHK
2002.10.21
3:12:36 pm
7
A
B
C
D
E
COMPANY NAME
Address
F
City
Size
TITLE :
A3
SGH-V205
K
REV Drawing Numbe r
Shee to f
10 11
0. 8
8