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Samsung galaxy Not 2 GT-N7100 WCDMA BAND5 TX 3G Network Not Working Solution

Samsung galaxy Not 2 GT-N7100 WCDMA BAND5 TX 3G Network Not Working Solution Schematic,Circuit,Diagram
Samsung galaxy Not 2 GT-N7100 WCDMA BAND5 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

Check the Voltage at

C101 = VDD_2V85_SUE2 ?

Step 3

Check C118,L107 :
About 22dBm ?

Resolder or change
C118,L107

Step 4

Check component
soldering status OK at
F100

Resolder or change
F100

Step 5

Check L138,L111 :
About 22dBm ?

Resolder or change
L138,L111

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

Resolder or change
U104
NO
{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

Change or resolder
OSC100

Check the freq. at

OSC100 PIN 1,3: 26MHz ?

Step 10

WCDMA BAND5 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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Updated: 09/12/2015 — 11:03 PM

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