Samsung i640 Service Manual - Page 77
Pin#6: High, Pin#5: Low, Pin#4: Low, Pin#3BS=L, Pin#1EN=H
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Flow Chart of Troubleshooting 9-9. GSM Transmitter TX ON (PCL 5 level) U100 pin11 >=5 dBm No U100 pin17 >=5 dBm No PAM100 pin9 >=5 dBm Yes Yes Yes Resolder RFS100, C104,L100,R100, C105 Check U100 truth table No Yes Resolder or Change U100,C131,C154 Pin#6: High Pin#5: Low Pin#4: Low Check R106,R109, R118,UCP200 Resolder or Change U100 Yes PAM100 pin7 >=-30 dBm Pin#3(BS)=L Pin#1(EN)=H No Check U101 Check Vramp No Check Operating mode No OK Yes Resolder PAM100, Check UCP200 Check VBAT or Resolder / Change PAM100 Resolder or change R119,UCP200 END 9-33 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
9-33
This Document can not be used without Samsung's authorization
9-9. GSM TrA¹º»i¼¼er
½X ON (PµL 5 lEVEl)
U100 pIn11
>=5 dBm
U100 pIn
17
>=5 dBm
YE´
No
YE´
µhECk
U100 t²uth
tablE
No
±E´oldE² o²
µhangE U100
±E´oldE² o² µhangE
U100,
µ131,µ154
YE´
YE´
No
µhECk U101
¶ND
P¾¿100 pIn
¸
>=5 dBm
µhECk À²amp
OK
±E´oldE² P¾¿100,
µhECk UµP200
µhECk ÀB¾½ o²
±E´oldE² / µhangE
P¾¿100
YE´
No
No
P¾¿100 pIn
7
>=³30 dBm
Pin#6: High
Pin#5: Low
Pin#4: Low
µhECk
OpE²atIng
modE
YE´
No
±E´oldE² o² ChangE
±11¸,UµP200
Pin#3(BS)=L
Pin#1(EN)=H
±E´oldE²
±Fs100,
µ104,L100,±100,
µ105
µhECk
±106,±10¸,
±11·,UµP200