Flowchart of Failure Analysis for The Video-system Assy
A
DTV doesn't work
DTV
Digital broadcasting is not received. YES
< PDP-427XDA : Only >
Is any function which inputs signal selected with the input selector? YES Has the symptom settled when the Digital RF IN terminal and input cable are checked ? NO
NO
Select a designated input with the input selector.
YES
Poor contact of the terminal part or input cable is defective.
Is the power-supply voltage of CN4017 normal? YES
NO
Check between CN4017 and P3,P8 (Power Supply).
B
Is RESET_DT(IC8401 159pin) High? YES Do you communicate by TXD_DT(IC8401:103) and RXD DT(IC8401:102)? YES Is a signal output from CN4013? YES Is the signal input from CN4013 to IC8001? YES Has the symptom settled when the DTB Assy is replaced? NO Has the symptom been settled when the MAIN Ass'y is replaced? YES YES The DTB Assy is defective. Replace the DTB Assy. NO Check between CN4013 and IC8001. NO Check between IC8401(102,103) and CN4014. NG Replace Main Ass'y NO Check between IC8401(159pin) and CN4014.
