VIDEOCON TV 14'NORMAL PCB
MAIN IC LA76931K(9E AOA/5AP3/5AZ9)
EHT BSC24-01N4028W
VERTICAL IC LA78040
SOUND IC LA42071
NO EHT FAULT
1.Power on/Check eht supply voltage-----ok.
2.Check driver supply voltage(standby)-----ok.
3.Standby release by remote----Again check driver transistor collecter voltage-----very low.
4.Power off/Add a condensor C407(47mf/35V) into driver supply.
5.Power on/Check driver transistor collecter voltage----ok.
6.Power off/Open old condensor C407(47mf/35V).
7.Set new condensor 47mf/35V.
8.Discussion circuit diagram.
9.power on/Then----
8 сен 2024