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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