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Flow Chart of Troubleshooting
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9-21
9-13. GSM Transmitter
U101 pin 12,13,28,
29>=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 RFOL
signal, RF13MHz,
RF PSU Part
Check +VBAT or PAM
control signal
Resolder or Change F101
Check F101, OK?
Yes
U101 pin 4,5,6,7
>= 1V
Resolder R112,C120
Resolder or Change PAM100
Check ANT Switch
control circuit
Change or Resolder
L109,C112,C130
PAM100 pin4
<= -11dBm
U101 pin15
<=15dBm
18dB
PAM100 pin11
>= 18dBm
F100 pin10
>= 18dBm
Check F100
pin9=L,
pin11=H(2.6V)
TX ON (5Level)
Resolder RFS100,C101,L102
F100 Pin13
>= 20dBm
Содержание SGH-t329 Series
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