Samsung Galaxy Note 3 SM-N900 GSM850/GSM900 TX 2G Network not Working Solution

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Samsung Galaxy Note 3 SM-N900 GSM850/GSM900 TX 2G Network not Working Solution Schematic , Diagram , Circuit

Samsung Galaxy Note 3 SM-N900 GSM850/GSM900 TX 2G Network not Working Solution Step by Step 

Step 1

F100 PIN 4 :

About 30dBm ?

CHECK soldered

- CN100, L100, C104

Step 2

Check F100 PIN 6

About 30dBm

Resolder or change

F100

Step 3

Check the Voltage at

C104 = VBATT ?

Resolder or chan

C104, L110

Step 4

Check component

soldering status OK at

F101

Resolder or change

F101

Step 5

Check F101 PIN 9

About 30dBm ?

Resolder or change

F101

Step 6

Check U101 PIN 4

About 30dBm ?

Resolder or change

L112, C139

Step7

Check U101 PIN 26

About 10dBm?

Resolder or change

U101

Step 8

Check the freq. at

OSC100 PIN 4 : 26MHz ?

Change or resolder

OSC100

Step 9

Check component

soldering status ok at

U103

Resolder or change

U103

Step 10

GSM850/900 Transmitter is O.K?

Resolder or change

U300

                                               Samsung Note 3 N900 GSM 850 GSM 900 TX Solution

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