Samsung galaxy Grand i9082 WCDMA Band8 / GSM 900 RX Network not working Solution

Samsung galaxy Grand i9082 WCDMA Band8 / GSM900 RX Network not working Solution Schematic, Diagram,Circuit

Samsung galaxy Grand i9082 WCDMA Band8 / GSM900 RX Network not working Solution Step by Step  

Step 1

NORMAL CONDITION

catch the channel?

Step 2

Check L101 ≤ -65dBm ?

CHECK soldered

RFS100, L101, L144, C152, C153

Step 3

Check the Voltage at

C100 = VBAT_RF ?

Resolder or change

U101, C100

Step 4

Check L105, L106

≥ -65dBm ?

Resolder or change

L105, L106

Step 5

Check component

soldering status OK at

DUF100

Resolder or change

DUF100

Step 6

Check DUF100 PIN 1, 8

≥ -65dBm

Resolder or change

DUF100

Step 7

Check the voltage at

{C139,C138 =

VOUT_CHARGER ?}

& {L402

= VOUT_CHARGER?}

& {C136, C137,C453 = 2.7V ?}

& {C142, C143,C453 = 2.7V ?}

Resolder or change

U104

Step 8

Check the freq. at

OSC100

PIN1,3 : 26MHz ?

Change or resolder

OSC100

Step 9

WCDMA band8/GSM900

Receiver is O.K?

Resolder or change

UCP300

END

samsung i9082  WCDMA Band8 / GSM900 RX Solution

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