JVC TV -- AV-21F21MH3 shut down after 5seconds

[siraniko]

mga masters may dinala sa akin na jvc tv, no power, after resoldering cold joints nag-ohmeter check ako and found out the HOT is shorted. when the HOT was replaced, it powers on but after few seconds it returns to stand by mode. i try to replace the vertical IC but it did not help, same it turns to stand by after few minutes.ano kaya ang culprit dito mga masters thru your experiences with this model

[Simatar]

Sa jungle sir tapos na ba resolder?

[siraniko]

na resoldered na lahat na cold solder joints sir, di kaya eeprom ang prob dito kc wala naman overloading sa hor output. tried ko rin replace ang yoke but the same problem pa rin

[Simatar]

Pag On ba bago magshutdown sir bright ba ang screen? May case kasi na pag over ang screen voltage autoshutdown... konting baba sa screen voltage subukan mo nga.

[siraniko]

di makita ang raster kc seconds lang stand by na sir, tried ko adjust screen from minimum then gradually increasing pero wala rin effect, pag shut down na makikita mo yung raster na bilog na lang going to dot pero sandali lang yun

[ultrasonic™]

so  meaning  power hold down  pala  kau

check  nyu  muna  kng  stabled  ba ang B+   
baka  biglang  umaakyat

[ccasiser]

di makita ang raster kc seconds lang stand by na sir, tried ko adjust screen from minimum then gradually increasing pero wala rin effect, pag shut down na makikita mo yung raster na bilog na lang going to dot pero sandali lang yun

Yung bilog na yun .. means na may High voltages kayo. so ibig sabihin nag oscilate ang Horizontal nyo kaya ngalang Hol down sya.. tama si Bos Ultra,

Paki check mo yung B+ at pati narin yung 9volts supply sa jungle at 5V sa System.. cguro with 5sec ay makaka measure ka dyan bago tuluyang mag standby baka kasi isa sa mga supply nato ay abnormal..

[enriz622]

sir parang flyback naman yata yan kasi sabi mo nasira ang hot ng tv, pwera lang kung sobrang gamit ang set o kaya may trouble ang fbt. try to isolate muna mga secondary load 1 at a time

[johnson.chua]

tama tsek mo B plus flyback o kaya sugsugin mo  b plus flyback pabalik may resistor ka makikita palitan mo o ijumper mo muna baka nag high resistance nun nag short hout mo