Samsung GT-S5230 Service Manual page 42

Flow Chart of Troubleshooting
9-15. DCS/PCS Transmitter
TX ON (5Level)
Yes
U100 Pin17 ≥
-65dBm
Yes
U100 pin11
≥ -30dBm
Yes
PAM100 pin15
≥ -30dBm
Yes
PAM100 pin3
≥ -4dBm
Yes
Check UCP200
END
①
No
Resolder U100, L105, C116
No
③
No
Resolder or Change C124, C125,
No
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Check U100
pin10 =H (2.6V)
pin16 = L
Yes
C126
Check PAM100 pin 1,
2,3,20, VBAT OK?
9-22
No
Check ANT Switch
control circuit
②
Change or Resolder U100
④
No
Resolder or Change
PAM100
Check VBAT or PAM
control signal