I'm repairing pioneer projection tv. the set is swithching on and off quickly i check the power supply i found 115 volts going in the flyback i check the hot and all transistor around the flyback its all okay. I checked also vertical output transistor its also okay. i think the flyback is ok because at the first time i switch it on i feel the highh voltage but in the second time no more. what is the cause of the main relay quickly disconnect?
Scoring disabled. You must be logged in to score posts.
This problem happen to me too. Once I open the back cover to find why,set suddenly comes alive.I scope the primary at the same time with the secondary with dual trace scope.When I banged the chassis,sec waveform dissapear.primary drive stays .I found bad solder joint in the secondary side.Resolder horizontal drive transformer.
Scoring disabled. You must be logged in to score posts.
