4-3
Block Diagrams
4-2-1 RF Tx Part
SGH-N620
RF
Block
Diagram
-
T
x
Part
a
b
c
d
e
-
GSM
:
T
x
level
5
@
6
0
CH
-
DCS
:
T
x
level
0
@
6
9
8
C
H
U605
HD155128TF
Antenna
S/W
U602
U501
VP40575
TXEN
RAMPDAC
BAND Selection
- GSM : Low
- DCS : High
ITXP
ITXN
QTXP
QTXN
Loop
Filter
TX VCO
U610
Dual P
A
M
U608
APC IC
U61
1
890
~
915
MHz
1710
~
1785
MHz
Coupler
15
9
4
4
3
3
U607
U609
1
1
35
8
540 MHz
PCN : 1575 ~ 1650 MHz (Tx)
GSM : 1
150 ~ 1
185 MHz
2
4
5
38
35
20
19
18
17
30
47
5
1
8
1
4
2
5
2
19, 20
Ant. S/W
Control
Circuit
3VTXRx
TXEN2
VC1
VC2
VC2
VC1
GSM(Tx)
DCS(Tx)
Rx
H
H
L
L
LL
11
SI4133-MLP28
U612
VCTCXO
13MHz
U613
IF VCO
1080MHz
PLL1
PLL2
RF VCO
AFCDAC
10
23
15
3
2
1
Содержание SGH-N625
Страница 2: ...Samsung Electronics Co Ltd Printed in Korea 08 2002 Rev 1 0 GH68 03123A ELECTRONICS ...
Страница 9: ...PCB Diagrams 2 1 2 PCB Diagrams 2 1 Main Top ...
Страница 10: ...PCB Diagrams 2 2 2 2 Main Bottom ...
Страница 27: ...5 Flow chart of trouble shooting 5 1 Power ON 5 1 Flow chart of trouble shooting ...
Страница 30: ...Flow chart of trouble shooting 5 4 VCC VCC R509 C526 SIMPWDN_BOOT F_WP SYSRST GPIO3 DTR1 F ...
Страница 35: ...5 9 Flow chart of trouble shooting 5 5 Microphone Part ...
Страница 36: ...Flow chart of trouble shooting 5 10 C532 U501 R525 R527 C561 C560 MIC VX 1P C553 R530 VX 1N R531 C538 VCC ...
Страница 43: ...5 17 Flow chart of trouble shooting R215 1K 100K R217 1 3 2 Q201 MMBT2222AWT1 BACKLIGHT B_LIGHT ...
Страница 44: ...Flow chart of trouble shooting 5 18 5 10 Melody Part ...
