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Samsung galaxy Not 2 GT-N7100 WCDMA BAND8 TX 3G Network Not Working Solution

Samsung galaxy Not 2 GT-N7100 WCDMA BAND8 TX 3G Network Not Working Solution Schematic Circuit,Diagram
Samsung galaxy Not 2 GT-N7100 WCDMA BAND8 TX 3G Network Not Working Solution Step By Step 
Step 1

U100 PIN11 : About

30dBm ?

CHECK soldered
– RFS100,C103, L102

C107,L100,ANT100

Step 2

Resolder or change
U100, C101

Check the Voltage at

C101 = VDD_2V85_SUE2 ?

Step 3

Check L134 :
About 22dBm ?

Resolder or change
L134

Step 4

Check component
soldering status OK at
F100

Resolder or change
F100

Step 5

Check C143 :
About 22dBm ?

Resolder or change
C143

Step 6

Check the Voltage at
R105,C134=VOUT_CHARGER?

Resolder or change
U103, R105,C134

Step 7

Check C124,C139
About 0dBm ?

Resolder or change
C124,C139

Step 8

Check the voltage at
{C150 = VOUT_CHARGER ?}
& {C165, C166, C167 =
VOUT_CHARGER?}
& {C149, C174 = 2.85V ?}
& {C144, C172 = 2.65V ?}
& {C148, C177 = 1.8V?}

& {C147, C175, C173 = 1.2V?}

Resolder or change

U104

Step 9

Check the freq. at

OSC100 PIN 1,3: 26MHz ?

Change or resolder

OSC100

Step 10

WCDMA BAND8 Transmitter is O.K?
Resolder or change
UCP300

Step 11

END

Unofficial Support Site For This Phone By welcome Zone Haldwani 

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