Friday, August 21, 2015

Samsung galaxy Grand i9082 DCS/PCS TX Signal not working Solution

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Samsung galaxy Grand i9082 DCS/PCS TX Signal  not working Solution Schematic , Diagram, Circuit




Samsung galaxy Grand i9082 DCS/PCS TX Signal  not working Solution Step by Step


Step 1


U101 PIN13 : About
27dBm ?

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 R105
: About -4dBm ?

Resolder or change
R105

Step 4


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 5


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

Change or reso
OSC100

Step 6 


DCS/PCS Transmitter is O.K?

Resolder or change
UCP300

END




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