Samsung GT-i9200 Troubleshooting

Level

8.

Block Diagram

8-1.

Repair

3

8-1

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PCB Diagrams

8-2.

8-2-1.

Top

Level3Repair

8-2

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Level3Repair

8-2-2.

Bottom

8-3

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Flow Chart of Troubleshooting

8-3.
Equipments

Level3Repair

Oscilloscope



Power Supply





Digital Multi-meter



driver, ESD Safe Tweezer

+

8960 &



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Spectrum Analyzer

8-4

Soldering iron



Level3Repair

8-3-1.

Power On

Mobile phone does not power on.

Check the Battery Voltage

it more than

Is

Yes

Power-on the phone and

check the power-on sound

or motor Vibration.

Sound or Vibration is ok

No

Check the

soldering crack, open, etc)

(

CON500

3.8

V?

.

?

No

Yes

Abnormal

If its voltage level is extremely low(under

Change the CON500(Power-key connector)

Charging the battery by TA.

Change the battery.

Change the FRONT-LCD ASSY

And retry to the power-on operation.

3.0

V),

Yes

Check the U500 output voltage

C575>1V,C574>1V)

(

Yes

Check the Clock OSC5000

Is that frequency

check the initial operation

END

Yes

Yes

19.2

Mhz?

No

No

If the output voltage is not satisfied with normal
condition, Change the U500.

Each voltage level has

※

Change the OSC5000.

Test condition(Oscilloscope setting)

※

us.div(time division)

:20.0

±10%

margin.

8-5

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Level3Repair

8-6

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Level3Repair

8-3-2.

Initial

Initial Failure

Yes

Re-download latest SW on the

mobile phone.

Abnormal

Re Check

Trouble shooting process

Change UME500

Change PBA

"8-3-1

Power on"

Normal

Abnormal

Abnormal

Check the OSC5000(Crack, open etc.)
Check the U500(Crack etc)

END

8-7

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Level3Repair

8-3-3.

Sim Part

Insert SIM card

Yes

Is SIM/SD assy well

connected to main board?

Yes

Check the SIM Voltage.

VREG_L15_UIM1

or

END

>= 1.8

3.0?

Yes

No

No

Reassemble SIM/SD assy and still SIM

does not work, replace SIM/SD assy

Change to the new SIM card.
If it doesn`t still work SIM card after changing
the SIM card, Check the U500(Crack etc)

8-8

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Level3Repair

8-3-4.

Charging Part

TA/USB Insert

Charging Sequence Start

Check L604/C636

C822

C607

Yes

=5V

Yes

=5V?

Yes

Yes

No

No

No

Reconnect TA or USB

Change U607

L604/C636(Crack, Short)

Change U607

END

8-9

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Level3Repair

8-3-5.

Microphone Part

Check microphone function

in voice call receiver mode

or in Voice Recording mode

Check the main MIC(in Sub

PBA) is placed for any

damage

Check the offset voltage

at below test

point(Main_MIC_P)

>0.4V

Yes

Yes

Yes

No

No

Resolder the main MIC.

Resolder main MIC or replace Sub PBA.

If the voltage level is not fixed, then

you have to change UCD600.

Check Sub PBA'Open/Short'

status between below each two

point

(48)&(50)

Yes

END

No

replace Sub PBA.

8-10

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Level3Repair

8-11

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Level3Repair

8-3-6.

Speaker Part

Play MP3 with maximum volume level.

Check Speaker Connectors

are placed for any damage

Check speaker function.

Yes

Check the connection of

Speaker module

Yes

No

No

Reconnect speaker or replace speaker

module

Resolder the Speaker Connector(s)

or replace Sub PBA.

Yes

Check HDC800's

crack, open?

Yes

Check the signals on

C625,C626

Yes

END

(43)&(47)

No

replace Sub PBA.

No

Replace UCD600

8-12

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Level3Repair

8-13

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Level3Repair

8-3-7

Receiver Part

Check receiver function

in voice call receiver mode.

Yes

Check the receiver module

for any damage(tear in

FPCB, crack, etc)

No

Check the signals on

C670, C669

Yes

Yes

Replace receiv er module

No

Replace UCD600

Check C670, C669 crack,

open?

END

Yes

Replace V700, V701

8-14

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Level3Repair

8-3-8.

Check memu setting

Menu→applications→setting→wireless and network
mobile networks→network mode→setting is auto mode

No Service

Menu→Phone→Keypad

*#1234#

L511,L510,C571,C569

No service

Yes

check Phone version

→

PHONE:I9200XXXX or

PHONE:unknown

PHONE:unknown

Check the CP V_BAT

= 1.3~2.05V

→

→

→

?

PHONE:I9200XXXX

No

Check the contact of antenna.

Sub FPCB)

(

Replace the L511,L510,C571,C569

Yes

VWTR0_RF2_2.0V,VWTR0_RF1_1.3

VWTR0_RF2_2.0V(C300)

VWTR0_RF1_1.3V(C301)

Check the

V

Abnormal

Change the board

Yes

END

=2.0V

=1.3V

No

Replace the U500

8-15

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Level3Repair

8-16

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Level3Repair

8-3-9.

GSM

RX

1800

NORMAL CONDITION

catch the channel?

Check C106

Check F101 PIN6

-65

≤

Check the voltage at

C102= V_Battery

Check component

soldering status OK at

Check F101 PIN

-65

≤

≤

dBm

F101

dBm

NO

NO

YES

NO

YES

-65

?

?

dBm

1

CONTINUOUS RX ON

RF INPUT

AMP

?

?

YES

NO

NO

NO

NO

CHECK soldered

RFS101, L101, C106

esolder or change

R

F101

CHECK soldered

C104, C102

Resolder or change

F101

esolder or change

R

F101

:-50

: 698

dBm

CH

YES

Check the voltage at

C102,C104= V_Battery

{

C100, C101=V_Battery

&{

YES

Check the freq. at

OSC400 PIN

GSM1800 Receiver is O.K?

END

1:27

YES

MHz

?}

NO

?}

NO

?

NO

esolder or change

R

PAM102

Change or resolder

OSC400

esolder or change

R

UCP400

8-17

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Level3Repair

8-18

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Level3Repair

8-3-10.

WCDMA Band1 RX

NORMAL CONDITION

catch the channel?

NO

Check C106

Check DUF102 PIN6

-65

≤

Check the voltage at

C102= V_Battery

Check component

soldering status OK at

DUF102

Check L110

-65

≤

≤

NO

dBm

dBm

YES

NO

YES

-65

dBm

?

?

CONTINUOUS RX ON

RF INPUT

AMP

:-50

?

?

YES

NO

NO

NO

NO

CHECK soldered

RFS101, L101, C106

esolder or change

R

DUF102

CHECK soldered

C104, C102

Resolder or change

DUF102

esolder or change

R

L110

: 10700

dBm

CH

YES

Check the voltage at

C102,C104= V_Battery

{

C100, C101=V_Battery

&{

YES

Check the freq. at

OSC400 PIN

WCDMA B1 Receiver is O.K?

1:27

YES

END

?}

MHz

NO

?}

NO

?

NO

esolder or change

R

PAM102

Change or resolder

OSC400

esolder or change

R

UCP400

8-19

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