Wcdma Band8 Tx - Samsung GT-S5830 Service Manual

Level 3 Repair

8-4-9. WCDMA Band8 TX

**If you check the tx chain,
Check the not only RF Device but also resistor, inductor and capacitor.
CONTINOUS TX ON CONDITION
TX POWER DAC:120 CODE APPLIED
CH : 3013
Tx ON
RBW : 100KHz
VBW : 100KHz
Battery Voltage: 3.8V
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
Yes
No
Check C154 = 8 dBm ?
Check the U103
Yes
No
Check C133 = 26 dBm?
Replace U102
Yes
No
Check L125= 26 dBm? Replace DUF100
Yes
No
Replace PAM100
Check PAM100 PIN26
OUTPUT(RF CONN.)
With HP8960 >= 23dBm?
Yes
The End
8-43
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