Dcs/Pcs Tx - Samsung GT-S5830 Service Manual

Level 3 Repair

8-4-7. DCS/PCS TX

**If you check the tx chain,
Check the not only RF Device but also resistor, inductor and capacitor.
Tx ON (Level :5)
Battery voltage:3.8V
Check R105 >= 11dBm?
Check PAM100 PIN26
OUTPUT(RF CONN.)
With HP8960 >= 30dBm?
Yes
Yes
Yes
The End
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No
Check The U103
No
Replace PAM100
8-40
CONTINOUS TX ON CONDITION
TX POWER DAC:14500 CODE
APPLIED
DCS CH : 698
PCS CH : 661
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB