Samsung GT-B5510 Service Manual page 69

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 L116 = -
Check C125 = 26 dBm?
Check L111 =
Check U100 PIN14
OUTPUT(RF CONN.)
With HP8960 >= 23dBm?
Tx ON
Yes
8dBm?
Yes
Yes
24dBm?
Yes
Yes
The End
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TX POWER DAC:120 CODE APPLIED
No
Check the U101
No
Replace PAM101
No
Replace F102
No
Replace U100
8-40
CONTINOUS TX ON CONDITION
CH : 10700
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB