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Samsung galaxy Not 2 GT-7100 GSM1800 RX 2G Network Not Working Solution

Samsung galaxy Not 2 GT-N7100 GSM1800 RX 2G Network Not Working Solution Schematic,Circuit,Diagram

Samsung galaxy Not 2 GT-N7100 GSM1800 RX 2G Network Not Working Solution Step By Step

Step 1

NORMAL CONDITION
catch the channel?

Step 2

Check C103 ≤ -65dBm ?
CHECK soldered
RFS100, L102,C103,C106

Step 3

Check the Voltage at
C101 = VDD_2V85_SUE2 ?
Resolder or change
U100, C101

Step 4

Check L133
≥ -65dBm ?
Resolder or change
L133

Step 5

Check component
soldering status OK at
F100
Resolder or change
F100

Step 6

Check F100 PIN 18, 19
≥ -65dBm
Resolder or change
F100

Step 7

Check the voltage at
{C150 = VOUT_CHARGER ?}
& {C165, C166, C167
= VOUT_CHARGER?}
& {C149, C174 = 2.85V ?}
& {C144, C172 = 2.65V ?}
& {C148, C177 = 1.8V?}
& {C147, C175, C173 = 1.2V?}
Resolder or change
U104

Step 8

Check the freq. at
OSC100 PIN 1,3: 26MHz ?
Change or resolder
OSC100

Step 9

GSM1800 Receiver is O.K?
Resolder or change
UCP300

Step 10

END
Unofficial Support Site For This Phone By welcome Zone Haldwani 

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