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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
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9-21
9-13. GSM Transmitter
U101 pin 23,26,31
>=2.8V
Yes
Resolder U101
Check UCP201
END
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Check & Resolder RFLO
signal, RF13MHz,
RF PSU Part
Check +VBAT or PAM
control signal
Resolder or Change F101
Check F101, OK?
Yes
U101 pin 7,8,9,10
>= 1V
Resolder R110,R111,R112
Resolder or Change PAM100
Check ANT Switch
control circuit
Change or Resolder
L107,C125,C124
PAM100 pin12
<= -11dBm
PAM100 pin 38<=
-15dB
PAM100 pin16
>= 18dBm
F100 pin11
>= 18dBm
Check F100
pin10 = H (2.6V),
12 = L
TX ON (5Level)
Resolder RFS100,C101
F100 Pin8
>= 20dBm