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5-25
Flow Chart of Troubleshooting and Circuit Diagrams
L
VC1 : GSM TX
VC2 : DCS TX
L
VC1
VC2
Tx(GSM)
Tx(DCS)
RX
L
L
Antenna S/W Control Circuit
H
H
3.9nH
L107
0.5PF
C152
5.6pF
C145
15nH
L11
1
L10
6
8.2n
H
R113
22K
2
B1
5
B2
6
C1
3
C2
1
E1
4
E2
Q101
PEMD10
33nH
L108
L104
2.7n
H
C13
1
100uF
7
GSMI
N
9
GSMOUT
3
TXEN
VBAT T
4
8
VCC1
VCC2
12
10
VCCO
VRAM
P
6
VRE
G
5
U106
RF3140
BS
2
DCSI
N
1
DCSOUT
11
ANT1
27PF
C136
10
K
100PF
C13
4
Q103
DTA114YET1
1
3
2
R121
C13
8
C147
1N
F
27PF
E2
10P
F
C143
PEMD10
Q102
2
B1
5
B2
6
C1
3
C2
1
E1
4
R11
7
10
K
100K
R116
33PF
C133
L105 NC
22K
R11
4
R115 10
K
3
G1
G2
4
1
IN
2
OUT
27PF
C142
CON1
MS-156(02)
27P
F
C141
C15
0
33PF
G5
12
G6
13
G7
14
GSM_RX
10
GSM_TX
5
VC1
2
VC2
11
C14
6
U107
LMG002S-5047A
AN
T
8
DCS_R
X
1
DCS_TX
3
G1
4
G2
6
G3
7
G4
9
C15
1
15PF
27PF
C13
2
100PF
L109
3.9n
H
L110
NC
VC1
BANDSEL
VC2
TXPOWE
R
2V8RFVCC
+VBATT
GSMT
X
DCST
X
VC1
DCSR
X
GSMR
X
VC1
VC2
2V8RFVCC
TXEN2
Summary of Contents for SGH-T400
Page 2: ...Samsung Electronics Co Ltd Printed in Korea 12 2002 Rev 1 0 GH68 03158A ELECTRONICS ...
Page 11: ...2 1 PCB Diagrams 2 PCB Diagrams 2 1 Main Top ...
Page 12: ...2 2 PCB Diagrams 2 2 Main Bottom ...
Page 26: ...Flow Chart of Troubleshooting and Circuit Diagrams 5 2 ...
Page 30: ...5 6 Flow Chart of Troubleshooting and Circuit Diagrams ...
Page 38: ...5 14 5 8 Receiver Part Flow Chart of Troubleshooting and Circuit Diagrams ...
Page 39: ...5 15 Flow Chart of Troubleshooting and Circuit Diagrams ...
Page 40: ...5 16 Flow Chart of Troubleshooting and Circuit Diagrams 5 9 Ring Indicator ...
Page 43: ...5 19 Flow Chart of Troubleshooting and Circuit Diagrams 5 12 GSM Receiver ...
Page 44: ...Flow Chart of Troubleshooting and Circuit Diagrams 5 20 5 13 GSM Transmitter ...
Page 45: ...5 21 Flow Chart of Troubleshooting and Circuit Diagrams 5 14 DCS Receiver ...
Page 46: ...Flow Chart of Troubleshooting and Circuit Diagrams 5 22 5 15 DCS Transmitter ...