Samsung i640 Service Manual - Page 87

U100 pIn, >=0 dBm, µhECk, U100 t²uth, tablE, µhECk U200, µhECk À²amp, OpE²atIng, U100 pIn11, µ105

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Page 87 highlights

Flow Chart of Troubleshooting 9-13. PCS Transmitter (same as DCS) TX ON (PCL 0 level) U100 pin11 >=0 dBm No U100 pin15 >=0 dBm No PAM100 pin16 >=0 dBm Yes Resolder RFS100, C104,L100,R100, C105 Yes Check No U100 truth table Yes Yes Resolder or Change U100, C132,C195 (PAM out) Pin#6: High Pin#5: High Pin#4: Low Check R106,R109, R118,UCP200 Resolder or Change U100 Yes PAM100 pin2 >=-25 dBm Pin#5(BS)=H Pin#6(EN)=H No Check Vramp Check Operating mode OK Yes Resolder PAM100, Check UCP200 Check VBAT or Resolder / Change PAM100 Check U200 Resolder or change R119,UCP200 END 9-43 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
9-43
This Document can not be used without Samsung's authorization
9-ÁÇ. ÆÄS TrA¹º»i¼¼er ȺA»e Aº ÃÄSÉ
½X ON (PµL 0 lEVEl)
U100 pIn
15
>=0 dBm
YE´
No
YE´
µhECk
U100 t²uth
tablE
No
±E´oldE² o² µhangE
U100,
µ132,µ1¸5
(P¾¿ out)
YE´
YE´
No
µhECk U200
¶ND
P¾¿100 pIn
16
>=0 dBm
µhECk À²amp
OK
µhECk ÀB¾½ o²
±E´oldE² / µhangE
P¾¿100
YE´
No
P¾¿100 pIn
2
>=³25 dBm
Pin#6: High
Pin#5: High
Pin#4: Low
µhECk
OpE²atIng
modE
YE´
Pin#5(BS)=H
Pin#6(EN)=H
U100 pIn11
>=0 dBm
±E´oldE²
±Fs100,
µ104,L100,±100,
µ105
µhECk
±106,±10¸,
±11·,UµP200
±E´oldE² o²
µhangE U100
±E´oldE² P¾¿100,
µhECk UµP200
±E´oldE² o² ChangE
±11¸,UµP200