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

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Updated: 09/12/2015 — 11:04 PM

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