Samsung galaxy Not 2 GT-N7100 WCDMA Band5 GSM 850 RX 3G Network Not Working Solution

Samsung galaxy Not 2 GT-N7100 WCDMA Band5 / GSM 850 RX 3G Network Not Working Solution Schematic,Circuit,Diagram

Samsung galaxy Not 2 GT-N7100 WCDMA Band5 / GSM 850 RX 3G Network Not Working Solution Step By Step

Step1

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 C118, L107

≥ -65dBm ?

Resolder or change

C118, L107

Step 5

Check component

soldering status OK at

F100

Resolder or change

F100

Step 6

Check F100 PIN 20,21

≥ -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

WCDMA BAND5/GSM850

Receiver is O.K?

Resolder or change

UCP300

Step 10

END

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