Samsung gt s7562 Samsung Galaxy S Duos S7562 DCS/PCS Tx Network not Working solution

Samsung gt s7562 Samsung Galaxy S Duos S7562 DCS/PCS Tx Network not Working solution Schematic, Diagram,Circuit

Samsung gt s7562 Samsung Galaxy S Duos S7562 DCS/PCS Tx not Working solution
Step by Step

Continuous TX ON

CONTINOUS TX ON CONDITION
TX POWER DAC:14500 CODE
APPLIED
DCS CH : 685
PCS CH : 661
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB

Step 1

Check Output power of RFS100
≥ 28.5 dBm ?

Check Main ant. contact & L131,
L103, C122, L107,

Step 2

Check Output power at
R100, C164 ≥ 8dBm ?

Check the Ant.
switching diagram of U100
TP_ANT_SEL

Check GPIO control (UCP300)

Resolder or Change U100

Step 3

U100 normally is operated.

Change U100

Step 4

Check UCP300

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