Samsung SGH-Z240 Service Manual

Also see for SGH-Z240: Specifications User guide Service manual

Samsung SGH-Z240 Service Manual Manual pdf 73 page image

SAMSUNG Proprietary-Contents may change without noticeThis Document can not be used without Samsung's authorizationFlow Chart of Troubleshooting9-349-19. WCDMA ReceiverRx OnRF Input: 10700 CHCell Power:-40dBmRFS400( RF Connector)C406 ≥-50dBm ?NO Resolder or ChangeRFS100F400(Front End Module )Pin#19 ≥-50dBm ?Check or ResolderL508, C527YESF502(Duplexer)Pin #5 ≥-50dBm ? Resolder L511 or ChangeF502U505(RFR6250 ULNA_IN)Pin #18 ≥-65dBm ?Resolder or ChangeF400Check Front End ModuleControl Path & check NV dataNOYESU505 (RFR6250 ULNA_OUT)Pin #14 ≥-65dBm ? Resolder or ChangeU505YESYESYESYESYESNONONONOF400C423=L C426=L C429=L ?Rx OnRF Input: 10700 CHCell Power:-40dBmRFS400( RF Connector)C406 ≥-50dBm ?NO Resolder or ChangeRFS100F400(Front End Module )Pin#19 ≥-50dBm ?Check or ResolderL508, C527YESF502(Duplexer)Pin #5 ≥-50dBm ? Resolder L511 or ChangeF502U505(RFR6250 ULNA_IN)Pin #18 ≥-65dBm ?Resolder or ChangeF400Check Front End ModuleControl Path & check NV dataNOYESU505 (RFR6250 ULNA_OUT)Pin #14 ≥-65dBm ? Resolder or ChangeU505YESYESYESYESYESNONONONOF400C423=L C426=L C429=L ?Resolder or ChangeU505(RFR6250)U505 RX IQ signal≥1V ?VREG_TCXO, VREG_RFRXOf U505≒ 2.85V ?Check UCP100(MSM6250)YESCheck& ResolderL504ENDNONOYESF503(UMTS RX Saw Filter)Pin #3,4 ≥-65dBm ?U202(RFR6250 IMIXM,IMIXP)Pin #8,9 ≥-65dBm ?Check the path ofF503 & U505NOYESYESYESNOResolder C541 orChange F503Resolder or ChangeU505(RFR6250)U505 RX IQ signal≥1V ?VREG_TCXO, VREG_RFRXOf U505≒ 2.85V ?Check UCP100(MSM6250)YESCheck& ResolderL504ENDNONOYESF503(UMTS RX Saw Filter)Pin #3,4 ≥-65dBm ?U202(RFR6250 IMIXM,IMIXP)Pin #8,9 ≥-65dBm ?Check the path ofF503 & U505NOYESYESYESNOResolder C541 orChange F503