Wcdma Band8 Tx - Samsung GT-S5570 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.
Battery Voltage: 3.8V
Check C145 = 8 dBm ?
Check C137 = 26 dBm?
Check C131 = 24 dBm ?
Check PAM100 PIN26
OUTPUT(RF CONN.)
With HP8960 >= 23dBm?
Tx ON
Yes
Yes
Yes
Yes
Yes
The End
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TX POWER DAC:120 CODE APPLIED
No
Check the U101
No
Replace PAM102
No
Replace DUF101
No
Replace PAM100
8-58
CONTINOUS TX ON CONDITION
CH : 3013
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB