Samsung SGH-X120 Service Manual

Also see for SGH-X120: User manual Service manual

Contents

Samsung SGH-X120 Service Manual Manual pdf 12 page image

SAM SU N G Proprietary-C ontents m ay change w ithoutnoticeSGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams2-9This Document can not be used without Samsung's authorization9. DCS ReceiverContinuous RX ONRF Input : 660 CHAMP : -50dBmNORMAL CONDITIONCatch the channel ?YESNOU100 CheckPin #6 ≥ -65dBm ?U100 CheckPin #3 ≥ -65dBm ?U103 CheckPin#18,19 ≥ -65dBm ?Check soldered status ofC102CON101Resolder or ChangeU100 Resolder or ChangeU103 CheckPin#9,32=Clean 2.8V?U103 CheckPin#28,1,2,3=100mV?U300, C306, C308Check or resolderCheck U200NONOYESYESYESYESNOYESU103 CheckPin #8 : 13MHz ?Vpp : 860mV?OSC100 CheckPin #8 : 13MHz ?Vpp : 950mV?OSC100 CheckPin #4 = 2.8V ?U103Change or resolderNONO NOR129, 114resolderOSC100Change or resolderYES YES YESNOCheck soldered status ofC107, 115, ,L102, U102U102 CheckPin #1 ≥ -65dBm ? Check soldered status ofC114, 116NOYESNO