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Samsung Galaxy Note 3 SM-N900 GSM1800 RX 2G Network not Working Solution

Samsung Galaxy Note 3 SM-N900 GSM1800 RX 2G Network not Working Solution Schematic, Diagram , Circuit

Samsung Galaxy Note 3 SM-N900 GSM1800 RX 2G Network not Working Solution Step by Step 

Step 1

NORMAL CONDITION
catch the channel?

Step2

Check C100 ≤ -65dBm ?
CHECK soldered
CN100, L106, C110

Step 3

Check F100 PIN6
≤ -65dBm ?
Resolder or change
F100

Step 4

NO
Check the voltage at
C104= V_Battery ?
CHECK soldered
L100, C104

Step 5

Check component
soldering status OK at
F101
Resolder or change
F101

Step 6

Check F101 PIN 25, 26
≤ -65dBm ?
Resolder or change
F101

Step 7

Check the voltage at
{L107= V_Battery ?}
& {C122, C129 = 2.5V ?}
& {C116, C112, C133 = 2.32V }
& {C121 = 1.8V?}
& {C120, C119, C118, C111,
C105 = 1.5V?}
& {C124, C109 = 1.2V?}
Resolder or change
U103

Step 8

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

Step 9

GSM1800 Receiver is O.K?
Resolder or change
U300
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Samsung Galaxy Note 3 SM-N900  GSM1800 RX 2G Network not working Solution 
Samsung Galaxy Note 3 SM-N900 GSM1800 RX 2G Network not connect Solution
Samsung Galaxy Note 3 SM-N900  GSM1800 RX 2G Network Support Solution

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