Samsung gt s7562 Samsung Galaxy S Duos S7562 WCDMA 3G Network Band8 (900) Tx not Working solution

Samsung gt s7562 Samsung Galaxy S Duos S7562 WCDMA 3G Network Band8 (900) Tx not Working solution Schematic, Diagram,Circuit
Samsung gt s7562 Samsung Galaxy S Duos S7562 WCDMA 3G Network Band8 (900) Tx not Working solution Step by Step

Continuous TX ON
Target power 24 dBm)

CONTINOUS TX ON CONDITION
TX POWER DAC:14500 CODE
APPLIED
WCDMA Band8 CH : 2788
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB

Step 1
Check Output power of RFS100
20dBm ?

Check Main ant. contact & L131,
C108, C122, L107

Step 2

Check Output power at
L108, L141, L142 20dBm ?

Check the Ant.
switching diagram of U100
TP_ANT_SEL

Check GPIO control (UCP300)

Resolder or Change U100

Step 3
Check C122
20dBm ?

Resolder or Change F102, C122

Step 4
Check C121, L113 5dBm ?

Resolder or Change
PAM101, C121, L113

Step5
Change U100



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Samsung Galaxy GT S  Duos S7562 WCDMA 3G Network Band8 (900)Tx  Solution
Samsung Galaxy GT S Duos S7562 WCDMA 3G Network Band8 (900)Tx Not Working Solution
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