Samsung SGH-E715 Service Manual

Also see for SGH-E715: User guide Manual Manual de usuario

Contents

SAMSUNG Proprietary-Contents may change without noticeSGH-E715 Flow Chart of Troubleshooting and Circuit Diagrams2-11This Document can not be used without Samsung's authorization9. EGSM TransmitterContinuous TX ON conditionTX Power Code : 500 code AppliedCH : 62RBW : 100KHzVBW : 100KHzSPAN : 10MHzREF. Level : 10dBmATT. : 20dBC403= 3.7V?Change U400NOYESF400 Pin#6About 2~3 dBm? F400Pin#10 = High? U300,301Check & ChangeNOC402,CN400Check & ChangeYESF400Check & ChangeYESCheck theBattery BlockLevel ofU400 Pin #6 is1.2V?Check& Change R406OK ?U300Check & ChangeYESYESNONO NONOU400 pin#7About -5 dBm?U400 pin#3High ? Check U300YESNOYESU401 CheckPin#9,32 ≥ 2.8V ?U401 CheckPin #8 : 13MHz ?Vpp : 860mV?OSC400 CheckPin #8 : 13MHz ?Vpp : 950mV?OSC400 CheckPin #4 = 2.8V ?NOYESNONO NOR412,C426resolderOSC400Change or resolderYES YES YESNOU100,C106,C112Check or resolderU401 Pin#4,5,6,7 = 1.7V?YESChange U400Check U300NOYESLevel ofF400 Pin#7 is4~5dBm ?