Samsung SGH-i450 Service Manual

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Contents

SAMSUNG Proprietary-Contents may change without noticeThis Document can not be used without Samsung's authorizationFlow Chart of Troubleshooting9-269-14. EGSM TXTX ON (PCL 5 level)F101 pin11>=5 dBmF101 pin17>=5 dBmYesNoYes CheckF101 truthtableNoResolder orChange F101Resolder or ChangeF101,C100,L115YesYesNoCheck U101ENDPAM100 pin9>=5 dBmNoCheck VrampOK Resolder PAM100,Check UCP201Check VBAT orResolder / ChangePAM100YesNoNoPAM100 pin7>=-30 dBm1. Check FEM(F101) output2. Check FEM(F101) input3. Check PAM(PAM100) output4. Check PAM(PAM100) input5. Check RTR6275(U101)②①③④ ⑦Pin#6: HighPin#5: LowPin#4: LowCheckOperatingmode YesNoResolder or changeR129,UCP201⑤Pin#3(BS)=LPin#1(EN)=HResolder RFS101,C105,L101,R105,L132CheckR107,R110,R116,UCP201