Samsung Galaxy Note 3 SM-N900 WCDMA Band8 / GSM900 RX Network not Working Solution

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Samsung Galaxy Note 3 SM-N900 WCDMA Band8 / GSM900 RX Network not Working Solution Schematic , Diagram Circuit

Samsung Galaxy Note 3 SM-N900 WCDMA Band8 / GSM900 RX Network not Working Solution Step by Step 

Step 1

NORMAL CONDITION

catch the channel?

Step 2

Check C100 ≤ -65dBm ?

CHECK soldered

CN100, L106, C110

Step 3

Check F100 PIN6

≤ -65dBm ?

Resolder or change

F100

Step 4

Check the voltage at

C166= V_Battery ?

CHECK soldered

L100, C104

Step 5

Check component

soldering status OK at

F101

 Resolder or change

F101

Step 6

Check F101 PIN 9

≤ -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

Band8 / G900 Receiver is O.K?

 Resolder or change

U300

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