Thursday, August 20, 2015

Samsung galaxy S4 I9500 WCDMA BAND1 TX 3G Network Not Working Solution

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Samsung galaxy S4 I9500  WCDMA BAND1 TX 3G Network Not Working Solution Schematic,Circuit Diagram


Samsung galaxy S4 I9500  WCDMA BAND1 TX 3G Network Not Working Solution Step By Step

Step 1

F100 PIN 4 :
About 22dBm ?

CHECK soldered
- RFS100, L111, C136

Step 2

Check F100 PIN 6
About 22 dBm
NO

Resolder or change
F100

Step 3

Check the Voltage at
C166 = VBATT ?

Resolder or change
C166, L119

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

Resolder or change
C114, C140

Check U102 PIN 13
About 22dBm ?

Step 7

Resolder or change
U102 

Check U102 PIN 24
About 0dBm?

Step 8


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

Change or resolder
OSC100

Step 9

Resolder or change
U103

Check component
soldering status ok at
U103

Step 10

Band1 Transmitter is O.K? Resolder or change

UCP300

Step 11

END

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Samsung Galaxy S4 I9500  WCDMA BAND1 TX 3G Network Not Working Solution 
Samsung Galaxy S4 I9500  WCDMA BAND1 TX 3G Network Not Responding Solution
Samsung Galaxy S4 I9500  WCDMA BAND1 TX 3G Network Not Reachable Solution

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