SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
9-33
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9-9. GSM Transmitter
TX ON (PCL 5 level)
U100 pin11
>=5 dBm
U100 pin17
>=5 dBm
Yes
No
Yes
Check
U100 truth
table
No
Resolder or
Change U100
Resolder or Change
U100,C131,C154
Yes
Yes
No
Check U101
END
PAM100 pin9
>=5 dBm
Check Vramp
OK
Resolder PAM100,
Check UCP200
Check VBAT or
Resolder / Change
PAM100
Yes
No
No
PAM100 pin7
>=-30 dBm
Pin#6: High
Pin#5: Low
Pin#4: Low
Check
Operating
mode
Yes
No
Resolder or change
R119,UCP200
Pin#3(BS)=L
Pin#1(EN)=H
Resolder RFS100,
C104,L100,R100,
C105
Check
R106,R109,
R118,UCP200