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Samsung galaxy S2 GT-I9100 DCS/PCS TX Network Not Working Solution

Samsung galaxy S2 GT-I9100 DCS/PCS TX Network Not Working Solution Schematic,Diagram,Circuit
Samsung galaxy S2 GT-I9100 DCS/PCS TX Network Not Working Solution Step By Step 
Step 1
U101 PIN11 : About

27dBm ?

CHECK soldered
– RFS100,L107,C107,L108,

C106,C104,C105,ANT100

Step 2

Check the Voltage at

C102 = VBATT ?

Resolder or change

U101, C102

Step 3

Check C111, C118 :

About 27dBm ?

Resolder or change

C111, ,C118

Step 4

Check the Voltage at

R741,C117=VOUT_CHARGER?

Resolder or change

PAM100, R741, C117

Step 5

Check C124, L111 :

About -4dBm ?

Resolder or change

C124, L111

Step 6

Check the voltage at
{C138 = VOUT_CHARGER ?}
& {C169, C170, C171
= VOUT_CHARGER?}
& {C137, C174 = 2.85V ?}
& {C134, C176 = 2.65V ?}
& {C136, C178 = 1.8V?}

& {C135, C175, C173 = 1.2V?}

Resolder or change

U104

Step 7

Check the freq. at C123

: 26MHz ?

Change or resolder

OSC100

Step 8

DCS/PCS Transmitter is O.K?

Resolder or change

UCP300

Step 9

END

Unofficial Support Site For This Phone By welcome Zone Haldwani 

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Samsung Galaxy S2 GT-I9100 DCS/PCS TX Network Not working Solution 
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Updated: 09/12/2015 — 11:03 PM

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