Samsung SGH-A500 Service Manual page 25

13. RF Circuit Diagram
A
VRF1
U10 5
3 4
TX900_RX180 0
2
5
6
1
B
VRF1
U10 4
3 4
TX1800_RX90 0
2
5
6
1
C
D
BAND_SEL
VTIC_OUT
VRF1
E
R108
33 K
Q103
3
1
TXONP A
2
F
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U101
DCS_R X 12
1 GND 11
DCS_RX VC2
C101
2 10
47PF
GSM_RX
VC1 GSM_RX
3 9
DCS_TX GND
4
GND ANT
8
C112
5 7
GSM_TX GND 33PF,NPO,060 3
GND
6
F104
1
GND GND
C102 F103
27PF 4
IN OUT
8
CO
7 1
GO GI DCS_OUT
C104
6 2
10PF
GD GD1
5 3
GSM_OUT
DO DI
C110
TM
33PF
C115
4
NC
R101
TXONPA
51
TX_POWER
R109
C108
270
27PF
R121 C122
C121
68 27PF
150PF
C129
18N F
OSC101
3
CONTROL OUT1 6
4 NC OUT2 10
5 SELECT 7
POWE R
12 8 9 11 12
C117
VRF1
100PF
F10 5
L103
4 IN 3
TIC_FD OUT
1 2
GND GND
C132
C131 1U F
27PF X5R TYPE
F105 WILL BE CHANGED BETWEEN 1 AND 3 IN LAYOUT
SAMSUNG Proprietary-Contents may change without notice
ANT 1
1
1
2 2
3
3
4
4
CON101 L104
1.5n H
2 1
O U T IN
G4 G3 G2 G1
6 5 4
3
L101
10nH
2
C111
R107
27PF
1K
3
VRF1
D101
BAT62-02W
C109
100N F
U10 2
10 VCG 1
VDD
9 _VIN T 2
BS
R113
1K
8 VCD 3
C126
PU
27PF
7 VS 14
VDAC
VS S VS 2 5
R114 6
1K
16 15 14 13 12 11
C123
C107 C125
680P F 27PF 27PF
F10 1 BAND_SEL
4 OUT 3
IN
1 2
GND GND
F10 2
4 IN 3
OUT
1 2
GND GND
R110
22 0
R111
22 0
Changed by
6-11
SGH-A500 Flow Chart of Troubleshooting and Circuit Diagrams
L105
C120
C105
100PF
27PF
R118
0
10
4 8
GSMI N VCC2
C118
14 6
27PF AP C VCC1
U10 3
16 12
BS DCSOUT
2
DCSIN
21
C113 GND13
22
C119 18 GND1 0 GND14
33PF
19 23
27PF GND11 GND15
GND1 2 GND16 24
20
1 3 5 7 91 1 13 15 17
C114
10PF
Engineer
Kim H. K
Drawn by
Kim H. K
R&D CH K
TITLE :
DOC CTRL CH K
SGH-A500_REV1.9B
MFG ENGR CH K
Date Changed Time Changed QA CH K REV
2002 - 09 - 30
1.9B
VBA T
C10 3
7P F
C134
100UF
6.3V
C13 0
10UF
10 V
C127
4.7PF
GSM_OUT
DCS_OUT
COMPANY NAME
Address
City
Size
A3
Drawing Numbe r