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Samsung galaxy Grand i9082 WCDMA BAND1 TX 3G Network not working Solution

Samsung galaxy Grand i9082WCDMA BAND1 TX 3G Network not working Solution Schematic , Diagram, Circuit




Samsung galaxy Grand i9082WCDMA BAND1 TX 3G Network not working Solution Step by step

Step 1


Check U101 PIN13 :
About 22 dBm ?
CHECK soldered
RFS100, C152, C153, L100,
L101, L144, ANT100

Step 2

Check the Voltage at
C100 = VBAT_RF ?
Resolder or change
U101, C100

Step 3

Check L147, L109 :
About 22dBm ?
Resolder or change
L147, L109

Step 4

Check component
soldering status OK at
DUF101
Resolder or change
DUF101

Step 5

Check L113, L114, C118 :
About 22dBm ?
Resolder or change
L113, L114, C118

Step 6

Check the Voltage at
C104=VOUT_CHARGER?
Check C149 :
About 0dBm ?

Step 7

Resolder or change
C149

Step 8

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 9

Check the freq. at
OSC100
PIN1,3 : 26MHz ?
Change or resolder
OSC100

Step 10

WCDMA band1 Transmitter is O.K?
Resolder or change
UCP300

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Samsung Galaxy Grand i9082   WCDMA BAND1 TX 3G Networknot working solution 
Samsung Galaxy Grand i9082    WCDMA BAND1 TX 3G Network not reacheble Solution
Samsung Galaxy Grand i9082    WCDMA BAND1 TX 3G Network not available Solution

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