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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