Samsung galaxy Not 2 GT-N7100 DCS/PCS TX 3G Network Not Working Solution

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Samsung galaxy Not 2 GT-N7100  DCS/PCS TX3G Network Not Working Solution Schematic,Circuit,Diagram

Samsung galaxy Not 2 GT-N7100  DCS/PCS TX3G Network Not Working Solution St

Step By Step

Step 1

U100 PIN11 : About

30dBm ?

CHECK soldered
- RFS100,C103, L102

C107,L100,ANT100

Step 2

Check the Voltage at

C101 = VDD_2V85_SUE2 ?

Resolder or change

U100, C101

Step 3

Check C135,L110,C136

: About 30dBm ?

Resolder or change

C135,L110,C136

Step 4

Check the Voltage at

R105,C134=VOUT_CHARGER?

Resolder or change

U103,R105,C134

Step 5

Check C138,C121

: About 0dBm ?

Resolder or change

C138,C121

Step 6

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 7

Check the freq. at

OSC100 PIN 1,3: 26MHz ?

Change or resolder

OSC100

Step 8

DCS/PCS Transmitter is O.K?

Resolder or change

UCP300

Step 9

END

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