Samsung galaxy S4 I9500 GSM1800 RX 2g Network Not Working Solution

Samsung galaxy S4 I9500 GSM1800 RX Not Working Solution Schematic,Diagram,Circuit

Samsung galaxy S4 I9500 GSM1800 RX Not Working Solution Step By Step

Step 1

NORMAL CONDITION

catch the channel?

Step 2 

Check C136 ≤ -65dBm ?

CHECK soldered

RFS100, L111, C136

Step 3 

Check F100 PIN6

≤ -65dBm ?

Resolder or change

F100

Step 4 

Check the voltage at

C166= V_Battery ?

CHECK soldered

L119, C166

Step 5

Check component
soldering status OK at

F101

Resolder or change

F101

Step 6

Check F101 PIN 25, 26

≤ -65dBm ?

Resolder or change

F101

Step 7 

Check the voltage at
{L105= V_Battery ?}
& {C120, C127 = 2.5V ?}
& {C114, C111, C128 = 2.32V }
& {C119 = 1.8V?}
& {C118, C117, C115, C110,
C106 = 1.5V?}

& {C122, C108 = 1.2V?}

Resolder or change

U103

Step 8

Check the freq. at

OSC100 PIN 4 : 26MHz ?

Change or resolder
OSC100

Step 9

GSM1800 Receiver is O.K?
Resolder or change
U300

Step 10

END

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Samsung Galaxy S4 I9500  GSM1800 RX 2G Not Working Solution 

Samsung Galaxy S4 I9500  GSM1800 RX 2G Network Not Responding Solution

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Samsung galaxy Grand i9082 WCDMA Band1 RX 3G Network not working Solution

Samsung galaxy Grand i9082 WCDMA Band1 RX 3G Network not working Solution Schematic , Diagram , Circuit 

Samsung galaxy Grand i9082 WCDMA Band1 RX 3G Network not working Solution Step by Step

Step 1

NORMAL CONDITION

catch the channel?

Step 2

Check L101 ≤ -65dBm ?

CHECK soldered

RFS100, L101, L144, C152, C153

Step 3

Check the Voltage at

C100 = VBAT_RF ?

Resolder or change

U101, C100

Step 4

Check L147, L109

≥ -65dBm ?

Resolder or change

L147, L109

Step 5

Check component

soldering status OK at

DUF101

Resolder or change

DUF101

Step 6

Check DUF101 PIN 1, 8

≥ -65dBm

Resolder or change

DUF101

Step 7

Check the voltage at

{C139,C138 =

VOUT_CHARGER ?}

& {L402

= VOUT_CHARGER?}

& {C136, C137,C453 = 2.7V ?}

& {C142, C143,C453 = 2.7V ?}

Resolder or change

U104

Step 8

WCDMA band1 Receiver is O.K

Resolder or change

UCP300

END

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Samsung Galaxy Grand i9082  WCDMA Band1 RX 3G Network not working solution 

Samsung Galaxy Grand i9082  WCDMA Band1 RX 3G Network not reacheble Solution

Samsung Galaxy Grand i9082  WCDMA Band1 RX 3G Network Error Solution

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Samsung galaxy S4 I9500 No Service,No Network Not Working Solution

Samsung galaxy S4 I9500 No Service No Network Not Working Solution Schematic,Diagram,Circuit

Samsung galaxy S4 I9500 No Service No Network Not Working Solution Step by Step

Step 1

Check memu setting

Menu → applications → setting → wireless and network →

mobile networks → network mode → setting is auto mode ?

Step 2 

Menu → Phone → Keypad →
*#1234# → check Phone version →
PHONE : I9500XXXX or

PHONE : unknown

Check the contact of antenna.

(Sub FPCB)

Step 3 

Check the CP V_BAT

L300,L301,L302,C300 = 3.6~4V

Replace the L300,L301,L302,C300

Step 4

Check the CP_VSD1,CP_VSD2_1.8V
CP_VSD1 (C352) =0.9~1.4V

CP_VSD2 (C353) = 1.8V

Replace the UCP300

Step 5

Change the board

Step 6

END

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Samsung Galaxy S4 I9500 No Service Error Solution 

Samsung Galaxy S4 I9500 No Network Found Solution

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Samsung galaxy Grand i9082 DCS RX Network not working Solution

Samsung galaxy Grand i9082 DCS RX Network not working Solution Schematic , Diagram , Circuit 

Samsung galaxy Grand i9082 DCS RX Network not working Solution Step by Step

Step 1

NORMAL CONDITION
catch the channel?

Step 2

Check L101 ≤ -65dBm ?

CHECK soldered
RFS100, L101,C153,L144,C152

Step 3

Check the Voltage at

C100 = VBAT_RF ?

Resolder or change

U101, C100

Step 4

Check C114

≥ -65dBm ?

Resolder or change

C114

Step 5

Check component

soldering status OK at

F101

Resolder or change

F101

Step 6

Check F101 PIN 3,4

≥ -65dBm

Resolder or change

F10

Step 7

Check the voltage at

{C139,C138 =

VOUT_CHARGER ?}

& {L402

= VOUT_CHARGER?}

& {C136, C137,C453 = 2.7V ?}

& {C142, C143,C453 = 2.7V ?}

Resolder or change

U104

Step 8

Check the freq. at

OSC100

PIN1,3 : 26MHz ?

Change or resolder

OSC100

Step 9

DCS Receiver is O.K?

Resolder or change

UCP300

END

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Samsung Galaxy Grand i9082  DCS RX Network not working solution 

Samsung Galaxy Grand i9082  DCS RX Network not able to catch the channel Solution

Samsung Galaxy Grand i9082  DCS RX Network not connect the channel Solution

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Samsung galaxy Grand i9082 GSM 850 RX 2G Network not working Solution

Samsung galaxy Grand i9082 GSM850 RX 2G Network not working Solution Schematic , Diagram , Circuit 

Samsung galaxy Grand i9082 GSM850 RX 2G Network not working Solution Step by Step 

Step 1

NORMAL CONDITION

catch the channel?

Step 2

Check L101 ≤ -65dBm ?

CHECK soldered

RFS100, L101,C153,L144,C152

Step 3

Check the Voltage at

C100 = VBAT_RF ?

Resolder or change

U101, C100

Step 4

Check C111

≥ -65dBm ?

Resolder or change

C111,L108

Step 5

Check component

soldering status OK at

F100

Resolder or change

F100

Step 6

Check F100 PIN 3,4

≥ -65dBm

Resolder or chan

F100

Step 7

Check the voltage at

{C139,C138 =

VOUT_CHARGER ?}

& {L402

= VOUT_CHARGER?}

& {C136, C137,C453 = 2.7V ?}

& {C142, C143,C453 = 2.7V ?}

Resolder or change

U104

Step 8

Check the freq. at

OSC100

PIN1,3 : 26MHz ?

Change or resolder

OSC100

Step 9

GSM850 Receiver is O.K?

Resolder or change

UCP300

END

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Samsung Galaxy Grand i9082 GSM 850 RX 2G Network not working solution 

Samsung Galaxy Grand i9082 GSM 850 RX 2G Network not able to connect Solution

Samsung Galaxy Grand i9082 GSM 850 RX 2G Network not Response Solution

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Samsung galaxy S4 I9500 Receiver Part Not Working Solution

Samsung galaxy S4 I9500 Receiver Part Not Working Solution Schematic,Diagram,Circuit

Samsung galaxy S4 I9500 Receiver Part Not Working Solution Step by Step

step 1 

Check receiver function
in voice call receiver mode.

Step 2

Check the receiver module
for any damage (tear in

FPCB, crack, etc)

Replace receiver module

Step 3

Check the signals on

V700, V701

Replace U902

Step 4 

Check V700, V701 crack,

open?

Replace V700, V701

Step 5 

END

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Samsung Galaxy S4 I9500 Receiver Part Not Working Solution 

Samsung Galaxy S4 I9500 Receiver Part Not Signal Solution

Samsung Galaxy S4 I9500 Receiver  Part Not Sound Solution

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