Samsung galaxy S4 I9500 DCS/PCS TX 3G Network Not Working Solution Schematic,Circuit,Diagram
Samsung galaxy S4 I9500 DCS/PCS TX 3G Network Not Working Solution Step By Step
Step 1
F100 PIN 4 :
About 30dBm ?
- RFS100, L111, C136
Step 2
Check F100 PIN 6About 30dBm
Resolder or change
F100
Step 3
Check the Voltage atC166 = VBATT ?
Resolder or change
C166, L119
Step 4
Check componentsoldering status OK at
F101
Resolder or change
F101
Step 5
Check F101 PIN 10
About 30dBm ?
Resolder or change
F101
Step 6
Check U102 PIN 9About 30dBm ?
Resolder or change
C154, L118
Step 7
Check U102 PIN 24About 10dBm?
Resolder or change
U102
Step 8
Check the freq. atOSC100 PIN 4 : 26MHz ?
Change or resolder
OSC100
Step 9
Check component
soldering status ok at
U103
Resolder or change
U103
Step 10
DCS/PCS Transmitter is O.K?Resolder or change
U300
Step 11
END
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