Table Of Contents - Lenovo i909 Maintenance Manual

I908 Mobile Phone Maintenance Manual
PHONE EXTERIOR ......................................................................................................................5
1
MAIN BOARD LAYOUT...............................................................................................................7
2
COMPONENT SIDE: ............................................................................................................................7
3 BASEBAND ...................................................................................................................................9
3.1 LCD D
ISPLAY
No display after the phone is turned on.........................................................................9
3.1.1
3.1.2 The LCD backlight does not come on......................................................................10
R
3.2
INGING AND
The unit does not vibrate ............................................................................................... 11
3.2.1
No ringing sound ..............................................................................................................1
3.2.2
C
3.3 .............................................................................................................................13
HARGING
The charger has been connected to the phone, but there is no charging display on
3.3.1
the screen .....................................................................................................................................13
The screen shows that the phone is charging, but the battery cannot be fully
3.3.2
charged .........................................................................................................................................14
3.4 K K
EYPAD AND
The keypad does not work normally ............................................................................15
3.4.1
3.4.2 The keypad backlight is inactive ...................................................................................16
3.5 I C I
N ALL SSUES
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 T P
HE HONE CANNOT BE
RADIOFREQUENCY (RF).........................................................................................................20
4
P
4.1
ROBLEMS DURING
P
4.2
RODUCTION
4.2.1 AFC calibration ................................................................................................................21
4.2.2 Rx path loss........................................................................................................................22
4.2.3 PCL....................................................................................................................................22
4.3 T
ESTING OF THE
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 T S
ECHNICAL
5.2 909 P L
I ARTS
5.3 P
RECAUTIONS DURING THE

Table of Contents

...........................................................................................................................9
V
....................................................................................................... 11
IBRATION
B
.........................................................................................15
EYPAD ACKLIGHT
........................................................................................................................1
P
OWERED ON
S D
OFTWARE OWNLOAD
C
...................................................................................................21
ALIBRATION
U /P
NIT ROBLEMS DURING
909 A
TEPS FOR I SSEMBLY
..............................................................................................................30
AYOUT
A
SSEMBLY OF THE I
Page 3
LENOVO
.................................................................................19
........................................................................20
R ..............................................................24
EPAIR
...............................................................................28
909 ............................................................31