Samsung SGH-D428 Service Manual

Also see for SGH-D428: Owner's manual Quick reference card

Contents

SAMSUNG Proprietary-Contents may change without noticeSGH-D428 Flow Chart of Troubleshooting and Circuit Diagrams2-7This Document can not be used without Samsung's authorizationF1001 CHECKpin13 ≥ -65dBm ?3. PCS RXCONTINUOUS RX ONRF INPUT : 660CHAMP : -50dBmNORMAL CONDITIONcatch the channel?CHECKANT1001,L1002 contact ?U902pin 26,32: 2.8V ?F1001,F1002 CHECKpin6 ≥ -65dBm ?U902 CHECKpin16, 17 ≥ -65dBm ?C1012, F1013resolder or changeF1001,F1002,R1011resolder or changeC1012,F1002,C1013,R1011,L1006resolder or changeU102 pin39, C112change or resolderU903 CHECKpin 7 : 13MHz ?Vp-p : 950mV?OSC801change or resolderU902resolder or changeU704,R705resolder or changeU902pin1,2,5,6 Vp-p: 120mV ?NOYESNONONONONONOYESYESYESYESYESYES