Lenovo i909 Maintenance Manual

Ienovo i909

Mobile Phone

Maintenance Manual

LENOVO

I908 Mobile Phone Maintenance Manual LENOVO

File name: Lenovo i909 Mobile Phone Maintenance Manual

Edition: V1.0

Date: September 7, 2007

File No.:

Status:

Preface

This is an instruction manual used as a maintenance guide for Lenovo I909 both during

producing and after sale.

This manual is subject to modifications as is deemed necessary by further

technological development.

copyright statement

The copyright for this manual is the property of Lenovo Mobile Communication

Technology Ltd. Any person that duplicates this manual without Lenovo’s written approval

will be liable to prosecution.

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I908 Mobile Phone Maintenance Manual LENOVO

Table of Contents

1 PHONE EXTERIOR......................................................................................................................5

2 MAIN BOARD LAYOUT...............................................................................................................7

COMPONENT SIDE: ............................................................................................................................7

3 BASEBAND...................................................................................................................................9

3.1 LCD DISPLAY...........................................................................................................................9

3.1.1 No display after the phone is turned on.........................................................................9

3.1.2 The LCD backlight does not come on......................................................................10

3.2 RINGING AND VIBRATION .......................................................................................................11

3.2.1 The unit does not vibrate...............................................................................................11

3.2.2 No ringing sound..............................................................................................................1

3.3 CHARGING .............................................................................................................................13

3.3.1 The charger has been connected to the phone, but there is no charging display on

the screen.....................................................................................................................................13

3.3.2 The screen shows that the phone is charging, but the battery cannot be fully

charged

.........................................................................................................................................14

3.4 KEYPAD AND KEYPAD BACKLIGHT.........................................................................................15

3.4.1 The keypad does not work normally ............................................................................15

3.4.2 The keypad backlight is inactive...................................................................................16

3.5 IN CALL ISSUES........................................................................................................................1

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 THE PHONE CANNOT BE POWERED ON.................................................................................19

4 RADIOFREQUENCY (RF).........................................................................................................20

4.1 PROBLEMS DURING SOFTWARE DOWNLOAD ........................................................................20

4.2 PRODUCTION CALIBRATION...................................................................................................21

4.2.1 AFC calibration................................................................................................................21

4.2.2 Rx path loss........................................................................................................................22

4.2.3 PCL....................................................................................................................................22

4.3 TESTING OF THE UNIT/PROBLEMS DURING REPAIR..............................................................24

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 TECHNICAL STEPS FOR I909 ASSEMBLY...............................................................................28

5.2 I909 PARTS LAYOUT ..............................................................................................................30

5.3 PRECAUTIONS DURING THE ASSEMBLY OF THE I909............................................................31

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I908 Mobile Phone Maintenance Manual LENOVO

Edition

No.

Compiled by/

Modified by

Date of

compilatio

n/modifica

tion

Reasons for

modification

Main Changes

Page 4

1 Phone Exterior

Figure 1.1 Frontal view of the unit

I908 Mobile Phone Maintenance Manual LENOVO

Figure 1.2 Figure 1.2 Rear view of the unit (battery removed)

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I908 Mobile Phone Maintenance Manual LENOVO

2 Main Board Layout

Component Side

:

Baseband Chip

Receive

r

Contact

Power Management

Double-SPK Pin Connector

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I908 Mobile Phone Maintenance Manual LENOVO

Keypad Side:

Camera

LCD Connector

Keypad FPC

MMC Card Socket

Stand-by Battery

Vibration Motor

I0 Connector

SIM Card Socket

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I908 Mobile Phone Maintenance Manual LENOVO

3 Baseband

3.1 LCD Display

3.1.1 No display after the phone is turned on

The screen does

Y Y

N

Check the FPC and the main

board connection. Re-connect

and try again

OK

Check for such soldering

problems as pseudo soldering and

bridging at the ports of the LCD

Y

N

OK

Replace LCD

Mdl

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I908 Mobile Phone Maintenance Manual LENOVO

3.1.2 The LCD backlight does not come on

LCD backlight

inactive

Check the FPC and the main

board connection. Re-connect

and try again

OK

N

Check for such soldering

problems as pseudo soldering

and bridging at the ports of the

LCD

t

R

ld d

Y

OK

Y

Check whether the output of

backli

g

ht circuit is above 9V.

N

Replace LCD

Mdl

Y

Replace L1502 or U1508 and

check for the solderin

g

at

N

OK

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I908 Mobile Phone Maintenance Manual LENOVO

3.2 Ringing and Vibration

3.2.1 The unit does not vibrate

The unit

Y

OK

Check for the connection of

N

Replace motor

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I908 Mobile Phone Maintenance Manual LENOVO

3.2.2 No ringing sound

No ringing

Y

N

Y

Check whether U1205,

U1206 and U1207

function normally

N

Replace U1206

OK

Identify the SPK that makes no

sound. Check the speaker

connection or replace the speaker.

Try again to see if it functions

OK

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I908 Mobile Phone Maintenance Manual LENOVO

3.3 Charging

3.3.1 The charger has been connected to the phone, but

there is no charging display on the screen

No charging

prompt after

Y

Replace

h

Y

Replace

btt

N

Is there still a problem

when another batter

y

is

Y

OK

N

Replace

Check the soldering at

U1408 and J1301.

Re-solder and see if it

Is there still a problem

when another charger is

N

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I908 Mobile Phone Maintenance Manual LENOVO

3.3.2 The screen shows that the phone is charging, but the

battery cannot be fully charged

Y

N

Check for soldering

faults at U1408,

J1301 and U1402.

Touch u

p

and tr

y

OK

The charging

indictor is

N

Y

Replace U1408.

OK

N

Y

Replace U1402.

OK

N

Replace battery

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I908 Mobile Phone Maintenance Manual LENOVO

3.4 Keypad and Keypad Backlight

3.4.1 The keypad does not work normally

N

Y

N

The

Disassemble the mobile

phone to check the connection

of

keypad

FPC

and pseudo

Open up the phone and

check if the metal dome is

Fix or

replace

metal

Remove the metal dome

and clean the keypad with

alcohol. Attach a new dome

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I908 Mobile Phone Maintenance Manual LENOVO

3.4.2 The keypad backlight is inactive

Y

N

Y

N

Check the FPC for

possible pseudo

Some of the

Replace the

damaged

The keypad

OK

Replace

the FPC

bl

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I908 Mobile Phone Maintenance Manual LENOVO

3.5 In Call Issues

3.5.1 The voice of the person on the other end of the line

can’t be heard

Y

N

The voice

of the

Remove the upper

cover and check

Replace

the

Replace

th

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I908 Mobile Phone Maintenance Manual LENOVO

3.5.2 The person on the other end of the line can’t hear my

voice

Ｙ

Ｎ

Ｙ

Ｎ

Y

N

Remove the lower cover

and check MIC for any

Replace the MIC and try

i

Check

U1212/R1204/R1209/C121

0/C1211/R1203/R1216 for

possible pseudo soldering

hti it

ＯＫ

Re-so

lder

My voice can’t

Re-s

older

Check

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I908 Mobile Phone Maintenance Manual LENOVO

Re-solder

U1402

3.6 The Phone cannot be Powered on

N

Firstly check U1402 for pseudo

soldering. Is the output of

VTCXO, VCORE, VMEM and

The

Y

Is U2107 normal at

26MHz?

N

Check for pseudo

ld i t

U2106

Y

N

Are there soldering

problems at

U1101

?

Y

Touch up

and tr

N

Check the U2106

circuit

Re-solder

U1101

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I908 Mobile Phone Maintenance Manual LENOVO

4 Radiofrequency (RF)

4.1 Problems during Software Download

z Problem: The software cannot be downloaded properly.

z Causes: The baseband chip has been fitted the wrong way round or there are problems

with the soldering point; Pseudo soldering on CRYSTAL.

z Solution:

z Please re-download the software after replacing the defective assemblies.

Check whether the baseband

chip has been fitted the wrong

Re-solder U1101

Check U1101 for possible pseudo

The software

cannot be

Y

N

Y

Re-solder U1101

N

Y

Re-solder X2101

Check whether the crystal （X2101）

N

Respectively check X2101 and C2104 and C2148 of

U2101 at Pin31for

p

ossible

p

seudo solderin

g

Re-solder the pseudo

solderin

g

assemblies

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Lenovo i909 Maintenance Manual

Lenovo i909 Maintenance Manual

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