#Chinatv

China tv 14"NORMAL PCB (PENTAGON)
Main IC 8895CSNG 7DN5
EHT BSC25-T1010A
VERTICAL IC LA78040
SOUND IC TDA2003
STR CQ1265RT
REMOTE NOT WORK
1.Power on/Press remote button near sensor----not work.
2.Check voltage IR,Sensor & control key----ok.
3.Check Sense IR point---ok.
4.Check sense, main IC IR pin 63-----ok
5.Check main IC key control pin (3) voltage.
6.Power off/Open diode VD105(IN4148)one point.
7.check diode by meter----ok.
8.But suspect diode defective and then open it,Measure it again-----ok.
9.Suspect diode defective then it replace by a new diode.
10.Power on/Again check key problem pin(3) voltage-----ok.
11.Then----- check by remote----