Samsung i640 Service Manual - Page 80
ÁÂ. ÃÄS Receiver
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Flow Chart of Troubleshooting 9-10. DCS Receiver RX ON Sector Power = -50dBm No U100 pin11 >=-60dBm Yes U100 pin19,20 No >=-70 dBm Resolder RFS100, C104,L100,R100, C105 Check U100 truth table No Yes Pin#6: Low Pin#5: Low Pin#4: High Check R106,R109, R118,UCP200 Resolder or Change U100 Yes U101 pin38,39 >=-75 dBm No Resolder or Change L102,L103,L104,C126 Yes Check U101 & UCP200 END 9-36 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization
SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
9-36
This Document can not be used without Samsung's authorization
9-ÁÂ. ÃÄS Receiver
±X ON
sECto² PowE² = ³50dBm
U100 pIn11
>=³60dBm
U100 pIn1¸,20
>=³70 dBm
No
YE´
No
µhECk
U100 t²uth
tablE
No
YE´
µhECk U101 & UµP200
¶ND
YE´
U101 pIn3·,3¸
>=³75 dBm
YE´
±E´oldE² o² µhangE
L102,L103,L104,µ126
No
Pin#6: Low
Pin#5: Low
Pin#4: High
±E´oldE²
±Fs100,
µ104,L100,±100,
µ105
µhECk
±106,±10¸,
±11·,UµP200
±E´oldE² o²
µhangE U100