Lenovo S960 User manual

Lenovo S960
Service Manual
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LENOVO

LENOVO S960 手机维修手册
第2 页
Content
1CELLPHONE APPEARANCE ....................................................................................................5
2LAYOUT OF MOTHERBOARD.................................................................................................5
3BASEBAND....................................................................................................................................9
3.1 LCD DISPLAY ...........................................................................................................................9
3.1.1 When the device is turned on there’s nothing on screen ......................................................9
3.1.2 LCD backlight doesn’t light up. .........................................................................................10
3.2 CAMERAS DO NOT WORK PROPERLY........................................................................................11
3.2.1 Back camera does not work properly.................................................................................11
3.2.2 Front camera doesn’t work properly..................................................................................12
3.3 RING AND VIBRATION.............................................................................................................13
3.3.1 It does not vibrate..............................................................................................................13
3.3.2 It does not ring...................................................................................................................13
3.4 CHARGING..............................................................................................................................16
3.4.1 It doesn’t show the charging indicator when charger is plugged in. .................................16
3.4.2 It shows the charging indicator. But the battery can’t be fully charged.............................18
3.5 KEYBOARD AND KEYBOARD BACKLIGHT................................................................................19
3.5.1 Keyboard can’t work properly............................................................................................19
3.5.2 Keyboard backlight doesn’t light up. .................................................................................20
3.6 AUDIO PROBLEMS DURING PHONE CALLS ...............................................................................21
3.6.1 You can’t hear the person you are talking to during a phone call. ....................................21
3.6.2 You can’t be heard by the person you are talking to during a phone call. .........................22
3.7 DEVICE WILL NOT TURN ON. ...................................................................................................23
4RADIO FREQUENCY ................................................................................................................24
4.1 GSM CALIBRATION DURING PRODUCTION ..............................................................................24
4.1.1 GSM AFC calibration........................................................................................................24
4.1.2 GSM Rx Path Loss calibration ..........................................................................................24
4.1.3 GSM AFC calibration........................................................................................................25
4.2 GSM COMPREHENSIVE TEST...................................................................................................27
4.2.1 Switching spectrum and PVT template are over the limits. ...............................................27
4.2.2 Frequency Error is too big.................................................................................................27
4.2.3 Phase Error is too big........................................................................................................28
4.2.4 Power output related problems..........................................................................................29
4.3 WCDMACALIBRATION DURING PRODUCTION .......................................................................29
4.3.1 WCDMA Rx Path Loss calibration....................................................................................30
4.3.2 WCDMA TPC calibration..................................................................................................30
4.4 WCDMACOMPREHENSIVE TEST............................................................................................32
4.4.1 ACLR or SEM....................................................................................................................32
4.4.2 The results of PowerControl comprehensive test are not good..........................................32
4.4.3 FrequencyErr.....................................................................................................................33
4.5 WIFI TEST...............................................................................................................................33

LENOVO S960 手机维修手册
第3 页
4.6 USE OF BLUETOOTH ...............................................................................................................34
4.7 GPS -SEARCH SATELLITES AND LOCATE .................................................................................34
4.8 FM -SEARCH CHANNELS ........................................................................................................35
5HOW TO ASSEMBLE AND DISSEMBLE LENOVO S960....................................................36
5.1 ASSEMBLY SEQUENCE OF LENOVO S960..............................................................................36
5.2 DOS AND DON’TS WHEN ASSEMBLING LENOVO S960 ...............................................................37

LENOVO S960 Cellphone Service Manual
Page 5
1Cellphone appearance
2Layout of motherboard
Front of motherboard:

LENOVO S960 Cellphone Service Manual
Page 6

LENOVO S960 Cellphone Service Manual
Page 7
Back of motherboard:

LENOVO S960 Cellphone Service Manual
Page 8

LENOVO S960 Cellphone Service Manual
Page 9
3Baseband
Electronic circuit diagram
3.1 LCD display
3.1.1 When the device is turned on there’s
nothing on screen

LENOVO S960 Cellphone Service Manual
Page 10
3.1.2 LCD backlight doesn’t light up.
Check whether the correct voltage is
applied on the positive and negative
backlight terminals of the LCD module.
OK
OK
Replace the LCD
module.
Y
Y
Y
Y
OK
Check whether connections between FPC
of LCD module and connectors on
motherboard are good. Reconnect them.
Check whether LCD backlight works.
N
LCD backlight
doesn’t light up.
Check whether the output of the backlight
circuit at the motherboard end is correct.
Check whether chip U1601 works.
Replace U1601.
N
N
Screen is blank.
Check whether the EMI components in LCD
channel on motherboard have dry joint
problems. Re-solder the EMI components.
OK
Replace the LCD
module.
Check whether the connectors of the
LCD are attached correctly. Re-install
FPC. Check whether the cellphone
works.
N
N
Y
OK
Y

LENOVO S960 Cellphone Service Manual
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3.2 Cameras do not work properly.
3.2.1 Back camera does not work
properly.
Can’t take
photos.
OK
Check whether the EMI components
are integrated and check their solder
joints. Repair the EMI components.
Check the solder joints of U1101.
Re-solder or replace
U1101.
N
Y
N
Repair soldering, and
try again.
N
N
Replace the Camera
module. Check whether it
can take photos.
Check the solder joints of the Camera
module connectors. Repair soldering on
the connectors. Check whether it can
take photos.
N
Y
OK
Dissemble the unit. Check whether the
Camera module is detached. Re-assemble the
module. Check whether it can take photos.
N
Y
OK

LENOVO S960 Cellphone Service Manual
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3.2.2 Front camera doesn’t work
properly.
Can’t take
photos.
OK
Check whether the EMI
components are integrated and
check their solder joints. Repair
the EMI components.
Check the solder joints of U1101.
Re-solder or replace
U1101.
N
Y
N
Repair
soldering, and
try again.
N
N
Replace the Camera
module. Check whether
it can take photos.
Check the solder joints of the Camera
module connectors. Repair soldering on
the connectors. Check whether it can
take photos.
N
Y
OK
Dissemble the unit. Check whether the
Camera module is detached. Re-assemble the
module. Check whether it can take photos.
N
Y
OK
Check whether the module’s
connectors are deformed.
Replace connector J1602.
Y
N

LENOVO S960 Cellphone Service Manual
Page 13
3.3 Ring and Vibration
3.3.1 It does not vibrate.
3.3.2 It does not ring.
3.3.2.1 NXPaudio power amplifier
Replace the motor switching FPC.
Check whether the problem is fixed.
OK
Y
N
Check whether the solder joints of the motor
and the peripheral components are normal.
Re-solder and retry to see whether the
problem is fixed.
OK
Y
It does not
vibrate.
N
Replace chip U1301.
N
Check whether the solder joints of the motor
switching FPC are normal. Re-solder and
retry to see whether the problem is fixed.
OK
N
Use a multi-meter to check whether the
terminal voltage difference between the
two leads of the motor in the Motor
Vibration mode is higher than 2.6V.
Replace the
motor.
N
Y

LENOVO S960 Cellphone Service Manual
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3.3.2.2 SN audio power amplifier
Check PMU chip U1301. If it’s damaged,
replace it.
Check whether audio power amplifier U1401
on motherboard has a dry joint problem or is
damaged. Repair soldering or replace it. Try
again to see whether it rings.
N
Replace speaker. Retry to see whether it
rings.
Y
OK
Y
OK
It does not ring.
N
Check whether the connections of the
main FPC connectors are OK.
Y
OK
Check whether analog switch U1403 on
motherboard has a dry joint problem or is
damaged. Repair soldering or replace it.
Try again to see whether it rings.
Y
OK
N
Y
OK
Check whether the contacts between the
speaker spring clips and the sound
chamber stand are good.
Replace the sound chamber stand.
Y
N
N

LENOVO S960 Cellphone Service Manual
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Check PMU chip U1301. If it’s damaged,
replace it.
Check whether audio power amplifier U1405
on motherboard has a dry joint problem or is
damaged. Repair soldering or replace it. Try
again to see whether it rings.
N
Replace speaker. Retry to see whether it
rings.
Y
OK
Y
OK
It does not
ring.
N
Check whether the connections of the
main FPC connectors are OK.
Y
OK
N
Y
OK
Check whether the contacts between the
speaker spring clips and the sound
chamber stand are good.
Replace the sound
chamber stand.
Y
N
N
Test with earphones. If there’s sound in
earphones, then there is audio signal
input. Check whether the components
related to the audio power amplifier have
dry joint problems. Re-solder. Check
whether the problem is fixed.
OK
Y

LENOVO S960 Cellphone Service Manual
Page 16
3.4 Charging
3.4.1 It doesn’t show the charging
indicator when charger is plugged
in.
1

LENOVO S960 Cellphone Service Manual
Page 17
Replace the charger. Check
whether it can charge normally.
Replace the
charger.
It doesn’t show the
charging indicator when
charger is plugged in.
N
Y
Replace the battery. Check whether it
can charge normally and the battery’s
voltage is lower than 3V.
Replace the
battery.
Y
N
Check the solder joints of the
components of the charging chip -
module U1302. Re-solder. Check
whether the problem is fixed.
Y
OK
N
Replace U1101.
Y
OK
Check whether there’s any rips
on the battery FPC.
Replace the
battery.
Y
N
Re-fasten battery connector
J1301. Check whether it can
charge normally.
OK
Y
N

LENOVO S960 Cellphone Service Manual
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3.4.2 It shows the charging indicator. But
the battery can’t be fully charged.
N
N
N
Check the solder joints of
charging chip U1302.
Repair soldering. Try
again.
Replace the components
of module U1302. Try
again.
Replace U1101.
Replace the battery and try again to see
whether the battery can be fully charged.
It shows the charging
indicator. But the battery
can’t be fully charged.
OK
Y
OK
Y
OK
Y
OK
Y

LENOVO S960 Cellphone Service Manual
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3.5 Keyboard and keyboard backlight
3.5.1 Keyboard can’t work properly.
N
Side keys can’t
work properly.
Replace motherboard.
Check whether the solder joints of
the side key FPC are normal, and
FPC is broken. Do R1704, R1707
and R1303 have dry joint problems?
OK
Y
OK
N
The Power On button
can’t work properly.
Is the Voltage to Ground at PWRKEY
test point TP1112 is far less than the
VBAT voltage?
Check whether the main FPC
connectors are fastened properly, and
FPC is broken.
OK
Y
Replace the main
FPC.
Y
Replace the main
FPC.
N
Replace PMU U1301.

LENOVO S960 Cellphone Service Manual
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3.5.2 Keyboard backlight doesn’t light up.
Keyboard backlight
doesn’t light up.
Is ICON LED FPC soldered properly?
Re-solder ICON LED
FPC.
Is the motor switching FPC soldered
properly?
Re-solder the motor
switching FPC.
Replace U1301.
Y
Y
N
N