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Aug 29, 2015

Samsung Galaxy Note 3 SM-N900 WCDMA BAND5 TX 3G Network not Working Solution

Samsung Galaxy Note 3 SM-N900 WCDMA BAND5 TX 3G Network not Working Solution Schematic Diagram Circuit


Samsung Galaxy Note 3 SM-N900 WCDMA BAND5 TX 3G Network not Working Solution Step by Step 

Step1

F100 PIN 4 :
About 22dBm ?

CHECK soldered
- CN100, L100, C104

Step 2


Check F100 PIN 6
About 22dBm

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 35
About 22dBm ?

Resolder or change
F101

Step 6

Check U101 PIN 36
About 22dBm ?

Resolder or change
C145, L111, C147

Step 7

Check U101 PIN 26
About 0dBm?

Resolder or change
U101

Step 8

Check the freq. at
OSC100 PIN 4 : 26MHz ?

Change or resolder
OSC10

Step 9

Check component
soldering status ok at
U103

Resolder or change
U103

Step 10

Band5 Transmitter is O.K?

Resolder or change
UCP300







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