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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
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7-27
7-17. PCS Transmitter
Check U102
pin23, 26, 31
>=2.7V
No
Resolder U102
Check U200
END
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
Check & Resolder RFLO
signal, RF13MHz,
RF PSU Part
Check +VBAT or PAM
control signal
Resolder or Change PAM100
Check PAM100
pin 3,4,5,6,7 OK?
Yes
U102 pin 6,7,8,9
>= 1V
Resolder C150, L102,
C149, C146, R122
Resolder L104, C139, C147
Change or Resolder U100
Check ANT Switch
control circuit
PAM100 pin1
<= -11dBm
U102
pin2
<= -15dBm
PAM100 pin14
>= 18dBm
U100 pin13
>= 18dBm
Check U100
pin10 =
L
pin12 = H (2.68V)
TX ON (5Level)
Resolder RFS100, C102,C103
U100 Pin8
>= 20dBm