Samsung Galaxy Note 3 SM-N900 WCDMA BAND1 TX 3G Network not Working Solution Schematic , Diagram , Circuit


Samsung Galaxy Note 3 SM-N900 WCDMA BAND1 TX 3G Network not Working Solution Step by Step


Step 1

F100 PIN 4 :
About 22dBm ?

CHECK soldered
- CN100, L100, C104

Step 2


Check F100 PIN 6
About 22 dBm

Resolder or change
F100

Step 3

Check the Voltage at
C104 = VBATT ?

Resolder or change
C104, L110

Step 4


Check component
soldering status OK at
F101

Resolder or change
F101

Step 5


Check F101 PIN 7
About 22 dBm ?

Resolder or change
F101

Step 6

Check U101 PIN 13
About 22dBm ?

Resolder or change
L113, C140

Step 7


Check U101 PIN 24
About 0dBm?

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

Band1 Transmitter is O.K?

Resolder or change
UCP300





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