I have a 19 inch tv That turns off usually after about 10 minutes, I have to unplug it sometimes several times before it comes back on then It will turn off sometimes after 1 min but usually always after 4-5. Someone said to check the Hi Voltage circuit I have worked on electronics for years and fairly knowledgeable but just not with TV's specific circiurts. any advice.
2006-10-17 14:12:06 · 4 answers · asked by sonic 1 in Consumer Electronics ➔ TVs
Does one of your neighbors have a remote for the same kind of TV, and hate the programs you watch or the volume you watch them at?
2006-10-17 14:18:10 · answer #1 · answered by Steve H 5 · 0⤊ 0⤋
Ok sonic since you have some electronic knowledge and hopefully practice then I am going to tell you a couple simple tests that can be done in a few minutes, first we want to know wether it is the power supply section or the line amp and deflection stages , dont worry about the EHT yet , OK then you will know that when a large power transister is working it will be quite warm , ok then look for the power supply regulater transister, it will be mounted on a heat sink not too far from where the mains cord goes in , usually on the left side of the set, cant mistake it for the other large amp transister which is the line amp which runs the deflection and the eht side of things , that is to be found near the flyback transformer ( with the eht lead sprouting out and going to the CRT bowl !!. Right if you are still with me then swich the set off and feel with finger the power supply reg transister !! is it warm to hot ? if so then it means that the power supply is working and you have just by passed a whole heap of voltage measurements !if it is cold or say still room temp then the fault is with the power supply and you can forget the rest of the set . Now the line amp transister feel at that , if it is warm then it is probably working ok and the fault will be further on in the deflection ccts. Now this explanation is getting messy and I hope you have followed me. its one thing to do it and another to explain it. The bottom line though is if a transister is warm to the touch always means that it is drawing current and usually the circuit that it is connected to is also ok.. This method of fault finding is often practised by old bench hands with lots of exterience and can be applied to most electronics. With that I will leave you to have a go or take the advice of some of the other negative people . Cheers Pete
2006-10-17 19:18:39 · answer #2 · answered by Realist 2006 6 · 0⤊ 0⤋
It might just be that your TV isn't plugged in correctly or that you have a timer on and you just don't realize it.
2006-10-17 14:20:18 · answer #3 · answered by jjc92787 6 · 0⤊ 0⤋
gl
2006-10-17 14:20:47 · answer #4 · answered by kogmu 3 · 0⤊ 1⤋