Samsung SGH-X400 Service Manual

Also see for SGH-X400: User manual Manual

Contents

SAMSUNG Proprietary-Contents may change without notice4-18SGH-X400 Flow Chart of TroubleshootingThis Document can not be used without Samsung's authorization12. DPCS transmitterF1001 pin 10 :about 2~3 dBm?CN1001, C1003check&changeF1001pin 11, 5 : 2.8V ?U703, U704check & changeU1001 pin11about 4~5dBm?F1001check & changeU1001pin 3,6 : 3.7 V?NO NOYES YESYESNONO BATTERY, U102check & changeU1001pin 5 : 3V ?YESNOU1001 pin1about : -5dBm?YESYESU1001change or resolderNOU902pin14,23,26,32 :2.8V ?U102 pin39, C112change or resolderYESU902pin9,10,12,13:-20dBm ?U902pin5,6,7,8 :1.7V ?YESU701changeNONOU1001change or resolderYESU903pin 5,25,28 :3V ?NO U102 pin33, C111change or resolderNOU903pin 7 : 13MHz?Vp-p: 860mVYESU903pin9,10,11,1213: 3V?YESYESU902change or resolderOSC801pin 3 : 13MHz?Vp-p : 950mVOSC801change or resolderU701check or changeOSC801pin 4 : 3V ? U102 pin33, C111change or resolderU903change or resolderNONOYESNOYESNOCONTINUOUS TX ON CONDITIONCH : 698CH(DCS),660CH(PCS)TX POWER CODE: 350 CODE ApliedRBW : 100KHzVBW : 100KHzSPAN : 10MHzREF LEV. : 10dBmATT. : 20dBU102 pin 37, C113check or resolder