Перейти к содержимому

#Chinatv#Standby_release#Tv_no_on.How to repair china tv standby release but set no on.

Cosmic Electronics

0:00 / 0:00

#Chinatv#Standby_release#Tv_no_on.How to repair china tv standby release but set no on.

15 806 просмотров · 6 лет назад
Cosmic Electronics
52,2 тыс. подписчиков
15 806 просмотров · 6 лет назад
CHINA TV 14"NORMAL PCB MAIN IC 8895CSNG 7DN5 EHT BSC24-01N4014K BSC25-T1010A VERTICAL IC LA78040 SOUND ICTDA2003 TRANSISTOR POWER 1.Power on/Check H OUT transistor collector voltage-----ok. 2.Check driver transistor collector voltage----ok. 3.When power on then power LED glowing---then off,that means set standby release. 4.Check 8V pin No.17-------ok. 5.Check 5V pin No.47-------low. 6.Check 5V pin No.36------low. 7.Power off/Check ohms in 5V pcb line----low ohms. 8.Open pin No.47 from pcb. 9.Open pin No.36 from pcb. 10.Open tuner supply. 11.Measure ohms pin No.47-------high. 12.Measure ohms pin No.36--------low. 13.Measure ohms tuner supply----high. 14.As a result main ic pin No.36 low ohms.that means main ic defective. 15.Open main ic 8895CSNG 7DN5. 16.Then------