Samsung galaxy S2 GT-I9100 WCDMA Band2 / GSM1900 RX Network Not Working Solution

Samsung galaxy S2 GT-I9100  WCDMA Band2 / GSM1900 RX Network Not Working Solution Schematic,Circuit,Diagram

Samsung galaxy S2 GT-I9100  WCDMA Band2 / GSM1900 RX Network Not Working Solution Step By Step

Step 1

NORMAL CONDITION

catch the channel?

Step 2

Check C107 ≤ -65dBm ?

CHECK soldered
RFS100, L107,C107,L108

Step 3

Check the Voltage at

C102 = VBATT ?

Resolder or change

U101, C102

Step 4

Check L103, L106
≥ -65dBm ?

Resolder or change
L103, L106

Step 5

Check component
soldering status OK at

F100

Resolder or change

F100

Step 6

Check F100 PIN 16, 17

≥ -65dBm

Resolder or change

F100

Step 7

Check the voltage at
{C138 = VOUT_CHARGER ?}
& {C169, C170, C171
= VOUT_CHARGER?}
& {C137, C174 = 2.85V ?}
& {C134, C176 = 2.65V ?}
& {C136, C178 = 1.8V?}

& {C135, C175, C173 = 1.2V?}

Resolder or change

U104

Step 8

Check the freq. at C123

: 26MHz ?

Change or resolder

OSC100

Step 9

WCDMA band2/GSM1900

Receiver is O.K?

Resolder or change

UCP300

Step10

END

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Samsung Galaxy S2 GT-I9100 WCDMA Band2 / GSM1900 RX Network Not working Solution 

Samsung Galaxy S2 GT-I9100 WCDMA Band2 / GSM1900 RX Network Not Responding Solution

Samsung Galaxy S2 GT-I9100  WCDMA Band2 / GSM1900 RX Network Not Properly Work Solution

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Samsung galaxy S2 GT-I9100 GSM1800 RX 2G NETWORK Not Working Solution

Samsung galaxy S2 GT-I9100 GSM1800 RX 2G NETWORK Not Working Solution Schematic,Circuit,Diagram

Samsung galaxy S2 GT-I9100 GSM1800 RX 2G NETWORK Not Working Solution Step By Step

Step 1

NORMAL CONDITION

catch the channel?

Step 2

Check C107 ≤ -65dBm ?

CHECK soldered

RFS100, L107,C107,L108

Step 3

Check the Voltage at

C102 = VBATT ?

Resolder or change

U101, C102

Step 4

Check C101, L101

≥ -65dBm ?

Resolder or change

C101, L101

Step 5

Check component
soldering status OK at

F100

Resolder or change

F100

Step 6

Check F100 PIN 18, 19

≥ -65dBm

Resolder or change

F100

Step 7

Check the voltage at
{C138 = VOUT_CHARGER ?}
& {C169, C170, C171
= VOUT_CHARGER?}
& {C137, C174 = 2.85V ?}
& {C134, C176 = 2.65V ?}
& {C136, C178 = 1.8V?}

& {C135, C175, C173 = 1.2V?}

Resolder or change

U104

Step 8

Check the freq. at C123

: 26MHz ?

Change or resolder

OSC100

Step 9

GSM1800 Receiver is O.K?

Resolder or change

UCP300

Step 10

END

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Samsung Galaxy S2 GT-I9100 GSM1800 RX 2G NETWORK Not working Solution 

Samsung Galaxy S2 GT-I9100 GSM1800 RX 2G NETWORK Not Responding Solution

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Samsung galaxy S2 GT-I9100 WCDMA Band1 RX 3G Network Not Working Solution

Samsung galaxy S2 GT-I9100 WCDMA Band1 RX 3G Network Not Working Solution Schematic,Circuit,Diagram

Samsung galaxy S2 GT-I9100 WCDMA Band1 RX 3G Network Not Working Solution Step By Step

Step 1

NORMAL CONDITION

catch the channel?

Step 2

Check C107 ≤ -65dBm ?

CHECK soldered

RFS100, L107,C107,L108

Step 3

Check the Voltage at

C102 = VBATT

Resolder or change

U101, C102

Step 4

Check C108, L102

≥ -65dBm ?

Resolder or change

C108, L102

Step 5

Check component

soldering status OK at

F100

Resolder or change

F100

Step 6

Check F100 PIN 14, 15

≥ -65dBm

Resolder or change

F100

Step 7

Check the voltage at

{C138 = VOUT_CHARGER ?}

& {C169, C170, C171

= VOUT_CHARGER?}

& {C137, C174 = 2.85V ?}

& {C134, C176 = 2.65V ?}

& {C136, C178 = 1.8V?}

& {C135, C175, C173 = 1.2V?}

Resolder or change

U104

Step 8

Check the freq. at C123

: 26MHz ?

Change or resolder

OSC100

Step 9

WCDMA band1 Receiver is O.K?

Resolder or change

UCP300

Step 10

END

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Samsung Galaxy S2 GT-I9100 WCDMA Band1 RX 3G Network  Not working Solution 

Samsung Galaxy S2 GT-I9100 WCDMA Band1 RX 3G Network  Not Responding Solution

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Samsung GT-C3322 Metro Duos GSM850 Receiver 2G Network not Working Solution

 Samsung GT-C3322 Metro Duos GSM850 Receiver not Working Solution Schematic, Diagram , Circuit

                                          

 Samsung GT-C3322 Metro Duos GSM850 Receiver not Working Solution Step by Step 

Step 1

Normal condition
Catch the channel?

Check Ant and Resoleder
L100,C124,C117,L103,C120

Step 2

RFS100
Pin 2
>= -60dBm

Resolder RFS100,L104,L101

Step 3

PAM100
Pin 15
>= -70dBm

Check PAM100

Step 4

PAM100
Pin 17
>= -70dBm

Check F102,L112,C142

Step 5

F102
Pin 6,7
>= -75dBm

Check C139,L111,C143
(crack,open,etc)

Step 6

Check UCP200

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Samsung GT-C3322 Metro Duos GSM850  Receiver Network not working Solution 

Samsung GT-C3322 Metro Duos GSM850 not connect Solution

Samsung GT-C3322 Metro Duos GSM850 Receiver Network not Reachble Solution

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Samsung galaxy S2 GT-I9100 2M FRONT CAMERA Not Working Solution

Samsung galaxy S2 GT-I9100  2M FRONT CAMERA Not Working Solution Schematic,Circuit Diagram

Samsung galaxy S2 GT-I9100  2M FRONT CAMERA Not Working Solution Step By Step

Step 1

"Camera" function does not work

Step 2

Check the Camera

connector on Main PBA

Reconnect the HDC704

Step 3

Check the voltage
C533 = 1.2V
C714 = 2.8V
C712 = 1.5V
C549 = 1.8V

C553 = 1.8V

Resolder U903,R905,R907,L903
Resolder U703, C713, C714
Resolder U702, C711, C712
Resolder C549

Resolder C553

Step 4

Check R703 is 24MHz

Resolder R703

Replace the PBA.

Step 5

Check F705

Resolder F705

Replace the PBA.

Step 6

Replace the camera module

Step 5

END

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Samsung Galaxy S2 GT-I9100 2M FRONT CAMERA Not working Solution 

Samsung Galaxy S2 GT-I9100 2M FRONT CAMERA Not Responding Solution

Samsung Galaxy S2 GT-I9100 2M FRONT CAMERA Not Properly Work Solution

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Samsung GT-C3322 Metro Duos Camera not Working Solution

 Samsung GT-C3322 Metro Duos Camera not Working Solution Schematic , Diagram, Circuit

 Samsung GT-C3322 Metro Duos Camera not Working Solution Step by Step 

Step 1

Check camera

module & socket

(crack, open, etc) ?

Change camera module & socket

Step 2

Check Signal on

in pin4,6 of U303?

Change UCP200

Step 3

Check the

voltage in C353

≥2.7V, C352≥

1.4V?

Resolder U303

Step 4

Check Signal on

in C32

Change UCP200

Step 5

Check S/W setting in camera

mode

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Samsung GT-C3322 Metro Duos   Camera not working Solution 

Samsung GT-C3322 Metro Duos  Camera Defocus work Solution

Samsung GT-C3322 Metro Duos  Camera Lining Solution

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