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#Chinatv#Standby.How to repair China tv standby problem.

Cosmic Electronics

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#Chinatv#Standby.How to repair China tv standby problem.

24 085 просмотров · 6 лет назад
Cosmic Electronics
52,2 тыс. подписчиков
24 085 просмотров · 6 лет назад
CHINA TV 21"NORMAL PCB MAIN IC 8895CSNG7DN5 EHT BSC25-T1010A VERTICAL IC LA78040 SOUND IC TDA2003 STANDBY PROBLEM 1.Power on/Check EHT supply voltage---ok. 2.Check H OUT transistor voltage------ok. 3.Check DRIVER transformer input voltage---ok. 4.Check DRIVER transformer output voltage-----ok 5.Check DRIVER transistor collector voltage-----ok. 6.Check memory ic supply voltage---ok. 7.Check memory IC SCL voltage---ok. 8.Check memory IC SDA voltage----ok. 9.Check cristal voltage---ok. 10.Check voltage main IC pin No.64(standby). 11.When it will be 0V(pin 64),Then standby release. 12.Power off/Open cristal (8Mhz). 13.Set new cristal. 14.power on/Again check pin No.64.----same voltage same result. 15.Power off/Open memory IC (24C08). 16.Set new memory IC. 17.Then---------