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Aug 20, 2015

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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