Samsung SGH-T429 Service Manual - Page 59
PCS Transmitter
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9-17. PCS Transmitter Flow Chart of Troubleshooting TX ON (5Level) Yes F100 Pin7 >= 20dBm Yes F100 pin8 >= 18dBm Yes PAM100 pin15 >= 18dBm Yes PAM100 pin3 =2.8V RF PSU Part Yes Resolder U101 9-27 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization
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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
9-27
9-17. PCS Transmitter
TX ON (5Level)
Yes
F100
Pin7
>= 20dBm
No
Resolder
CN100,C104
Yes
F100
pin8
>= 18dBm
Check F100
pin9=H (2.6V)
pin11 = L
No
No
Check ANT Switch
control circuit
Yes
Change or Resolder
L112,C117,L118
Yes
PAM100
pin15
>= 18dBm
No
Resolder or Change
L112,C117,C118
Yes
Check Pam100
+VBATT(pin17)
PAM100
pin3
<= -11dBm
No
No
Resolder or Change
Pam101
Check +VBAT or PAM
control signal
Yes
Yes
No
Pam100 pin3
<= -15dBm
Resolder
R103
Yes
U101
pin12,13,28,29
>=2.8V
U101
pin 4,5,6,7
>= 1V
No
No
Check & Resolder RFLO
signal, RF13MHz,
RF PSU Part
Resolder U101
Yes
Yes
Check
UCP200
END