#Videocontv скачать в хорошем качестве

#Videocontv

VIDEOCON TV 21"ULTRA SLIM PCB MAIN IC TDA12155PS/N3/3/A09 EHT BSC24-01N4095M VERTICAL IC LA78141 SOUND IC TDA7297SA STR CQ0765RT NO EHT 1.Power on/Check eht supply voltage----ok,(standby & led glowing) 2.Standby release by remote(led off)------Then eht supply voltage perfect. 3.Check driver transister collector voltage------ok. 4.Check memory ic supply voltage-------ok. 5.Check SCL voltage------fluctuate. 6.Check SDA voltage-----fluctuate. 7.Check 5V main ic pin No.2-----ok. 8.Check 8V main ic pin No.3-----ok. 9.Check 5V main ic pin No.22----ok. 10.Check 3.3V main ic pin No.33------ok. 11.Check 3.3v main ic pin No.40----ok. 12.Check 3.3V main ic pin No.43------ok. 13.Check 5v main ic pin No.54--------ok. 14.Again check driver transistor collector voltage-------ok. 15.Check driver transistor base voltage-----missing. 16.Power off/Check driver transistor base-collector reading----ok. 17.Check driver transistor base-emiter reading------short. 18.open driver transistor collector-emiter frpm pcb. 19.Again check base-collector reading------ok. 20.Check base-emiter reading----ok. 21.Driver transistor C2331 ok. 22.Tracing the line driver transistor base to main ic pin No.56. 23.Open main ic pin 56 and separate from pcb. 24.Check ohms main ic pin No.56------low(H OUT pin). 25.Check ohms H OUT pcb line------high.But H OUT ic pin ohms-----low. 26 That means main ic defective. 27.Then------