Friday, August 21, 2015

Samsung galaxy Grand i9082 WCDMA BAND 8 TX 3G Network not working Solution

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Samsung galaxy Grand i9082 WCDMA BAND 8 TX 3G Network not working Solution Schematic , Diagram , Circuit




Samsung galaxy Grand i9082 WCDMA BAND 8 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, C10

Step 3


Check L105, L106 :
About 22dBm ?

Resolder or change
L105, L106


Step 4


Check component
soldering status OK at
DUF100

Resolder or change
DUF100

Step 5


Check L104, C108, C109 :
About 22dBm ?

Resolder or change
L104, C108, C109

Step 6


Check the Voltage at
C104=VOUT_CHARGER?

Resolder or change
U100, C104

Step 7


Check C148 : About
0dBm ?

Resolder or change
C148

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 band8 Transmitter is O.K?

Resolder or change
UCP300


Unofficial Support Site By welcome Zone Haldwani 


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