3. TECHNICAL BRIEF
- 53 -
3.16 FM radio
The FM receiver uses a digital low-IF architecture which allows for the elimination of external
components and factory adjustments. The receive (RX) section integrates a low noise amplifier (LNA)
supporting the worldwide FM broadcast band (87.5 to 108 MHz). An automatic gain control (AGC)
circuit controls the gain of the LNA to optimize sensitivity and rejection of strong interferers.
Figure 26 FM Radio circuit
FM Radio
Close to VD
(1005)
GPIO2
20
19
GPIO3
LOUT
16
NC1
22
23
NC2
25
PGND
11
RCLK
3
RF_GND
15
ROUT
9
SCLK
SDIO
10
VA
18
13
VD
VIO
12
7
_RST
_SEN
8
SI4701
U104
FMIN
4
FMIP
2
1
GND1
5
GND2
GND3
6
GND4
14
17
GND5
GND6
24
21
GPIO1
2V72_IO
2V85_IO
R117
10K
C124
22n
100p
C122
FB107
10
2.2u
C123
C125
220n
2V72_IO
0.1u
C127
FM_L
FM_R
FM_ANT
CLK32K
RST_FM
SDA
SCL
FM_INT
Содержание Prada KE850
Страница 1: ...Date March 2007 Issue 1 0 Service Manual Model KE850 Service Manual KE850 ...
Страница 3: ... 4 ...
Страница 5: ... 6 ...
Страница 70: ...4 PCB layout 71 4 PCB layout 4 1 Main Sub PCB component placement Main PCB Top Main PCB Top placement ...
Страница 71: ...4 PCB layout 72 Main PCB bottom Main PCB bottom placement ...
Страница 115: ... 116 6 Download S W upgrade 6 Press the START button ...
Страница 116: ... 117 6 Download S W upgrade 7 Stand by condition Wait is displayed connect the Phone KE850 KE850P40 7 V09a ...
Страница 117: ...6 Download S W upgrade 118 KE850 KE850P40 7 V09a KE850 KE850P40 7 V09a ...
Страница 127: ... 128 LGMC 8 pcb layout ...
Страница 128: ... 129 LGMC 8 pcb layout ...
Страница 129: ... 130 LGMC 8 pcb layout ...
Страница 130: ... 131 LGMC 8 pcb layout ...
Страница 131: ... 132 8 pcb layout ...
Страница 132: ... 133 8 pcb layout ...
Страница 133: ... 134 8 pcb layout ...
Страница 134: ... 135 8 pcb layout ...
Страница 135: ... 136 8 pcb layout ...
Страница 136: ... 137 8 pcb layout ...
Страница 137: ... 138 ...
Страница 139: ...9 RF Calibration 140 9 2 3 Click SETTING Menu 9 2 4 Setup Ezlooks menu such as the following figure ...
Страница 141: ...9 RF Calibration 142 9 2 7 Select MODEL 9 2 8 Click START for RF calibration 9 2 9 RF Calibration finishes ...
Страница 142: ...9 RF Calibration 143 9 2 10 Calibration data will be saved to the following folder Saving format year month day PASS ...
Страница 149: ... 150 ...
Страница 151: ... 152 ...
Страница 172: ...Note ...
Страница 173: ...Note ...