Lenovo i909 Руководство по техническому обслуживанию - Страница 3
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I908 Mobile Phone Maintenance Manual
PHONE EXTERIOR ......................................................................................................................5
1
MAIN BOARD LAYOUT...............................................................................................................7
2
COMPONENT SIDE: ............................................................................................................................7
3
BASEBAND ...................................................................................................................................9
3.1
No display after the phone is turned on.........................................................................9
3.1.1
3.1.2
The LCD backlight does not come on......................................................................10
3.2
The unit does not vibrate ............................................................................................... 11
3.2.1
No ringing sound ..............................................................................................................1
3.2.2
3.3
.............................................................................................................................13
3.3.1
the screen .....................................................................................................................................13
3.3.2
charged .........................................................................................................................................14
3.4
The keypad does not work normally ............................................................................15
3.4.1
3.4.2
The keypad backlight is inactive ...................................................................................16
3.5
3.5.1
The voice of the person on the other end of the line can't be heard .......................17
3.5.2
The person on the other end of the line can't hear my voice ...................................18
3.6
RADIOFREQUENCY (RF).........................................................................................................20
4
4.1
4.2
4.2.1
AFC calibration ................................................................................................................21
4.2.2
Rx path loss........................................................................................................................22
4.2.3
PCL....................................................................................................................................22
4.3
4.3.1
Switch Spectrum and Ramp Mask overrun ...................................................................24
4.3.2
Significant frequency error ................................................................................................25
4.3.3
Significant phase error ......................................................................................................25
4.3.4
Power output problems ..................................................................................................26
5
ASSEMBLY AND DISASSEMBLY OF THE I909...................................................................28
5.1
5.2
5.3
Table of Contents
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V
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Page 3
LENOVO
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909 ............................................................31