surprised with Australia being a pal territory they got no RGB scart, that blows. but yeah if you can repair it easily its worth doing for a good TV, check it out first while not live and discharged for visible faults, maybe just from being banged about / moved, also could be a DRY joint somewhere as always check the simple things first. i've been shocked by a few CRT TVs and Monitors(and a digital projector) and i'm still here. unless you're really dumb or careless you should be fine. but again might not be a bad idea to check locally and see if there's any being given away, you cant really lose with a Free TV and you may get a good one.
It's weird anyway, I doubt they EVER got taken out of the plastic. Many boxed systems I get always have one in plastic
It's not more dangerous than car repair and even less dangerous than using chainsaw. Just don't touch any high voltage parts with bare hands and you'll be fine. And yeah, rubber shoes, no grounded metallic parts nearby etc. Actually when i was 9 years old i was trying to fix convergence issues when anode connector fell off and i got 25kV discharged to my right hand. As you can see i'm still here. However if you'll get same thing with your left hand with your legs grounded, chances of getting killed will be way too high. 1) You can find some service manuals using google. 2) It depends. If it will be a common TV i won't bother myself, if it will be something more difficult than just dead transistor or IC, but if it's something really rare that can't be easily replaced, like one of those extremely rare and insanely expensive CRT displays capable of 3072x2304 or even 4096x3072 resolution (with special 384-768M PCI video card) i'll do my best to fix it. Because it will be impossible to find another one (less than thousand made, Google don't know a thing, and you'll probably never see one on eBay, at least for less than a half of a space shuttle price).
Firstly, my post was aimed at everyone, not just you. And a post count says nothing - what you says dictates your competence. Regardless, telling someone without knowing their level of expertise that it's fine to poke around in the back of a live television set it foolhardy. Your list is something that was lacking in your first post, but necessary. And you still leave off one item - KNOWLEDGE. You don't know what the OPs level of experience is - to be fair, if someone's asking on a forum, they generally don't know enough to fix a television, or they wouldn't be asking. Likewise, you don't know what set he has - some had controls that, even with a trimmer tool, meant waving your hand dangerously close to the HT circuit. And likewise, telling people to steer clear of the HT circuit is all very well, but you're not telling them WHAT that is! Again I repeat, the very area you're telling them to adjust IS that circuit. Television repair is NOT an area of electronics repair to jump into without a thorough knowledge of the theory behind a television set. I would never recommend an amateur do it without supervision. If you want to do so yourself, that's up to you - but for God's sake, read up on the subject first!
Hey guys, so this is what I was talking about. It's flickering green/red lines, sometimes 2, sometimes 4: Although it's not too noticeable when playing full screen games, for example: However, in games that have a black screen/background, or borders... it is going to be annoying and I might have to cover the top part of the screen with some dark paper/card: But I'll live with it for now. I don't have any sort of electronics knowledge or experience so won't be opening it up to toy with it. I can follow simple instructions when it comes to fixing things, but I'm sure this will be well beyond that. I don't see any options for adjusting screen size other than changing aspect ratio from 4:3 to 16:9. So for now I'll enjoy it and keep my eyes peeled for any free/dirt cheap sets that come up locally.
Hmm. Very curious symptoms. It looks like the red and green guns are turning on prematurely briefly towards the end of vertical retrace. Co-incidentally, it appears to begin right around the spot where the OSD is displayed... So it could be a digital problem, which is far harder to diagnose. Otherwise that's a nice looking set. If you can ignore those lines until you get a better one, go for it!
Ahh, those are indeed retrace lines. Probably an issue with the blanking circuit. There are a number of components that could be at fault. What model is the television?
i'd check the caps on the colour lines (RGB) going into the tube ( should be on a smaller board attached to the back of the tube itself) although they may not be, there may also be a chip in the same area) try them, also look for any stressed components
Well, in general you'd want to check the G2 voltage and the blanking circuit for retrace line issues, although you normally see them all over the screen. Being that they're just two colours, it could be a low supply to the RGB amp, although you'd usually find the screen gets bright, too. It could be the filter caps in those lines, in that case. I note in my faults database for coloured lines at the top of the screen on that model: Check TDA8175, D454, D456 and C456. Once again I stress that this should be done by a competent electronics engineer who knows what they're doing when it comes to television repair. With that in mind, it's a good place to start. However, there could well be differences in your version of the television, so take any of this information as-is and perform any such repairs at your own risk!
The entire CRT is considered toxic waste, because the front glass contains large quantities of lead in the form of lead oxide. This is true even for TVs that are marked as being RoHS compliant - lead in the CRT was exempted because there was no other practical method of letting the light through while absorbing the X-rays produced when the electron beam hits the shadowmask or aperture plate in the tube.
I could open it up and give it a visual inspection/post a photo here. But to be honest I'd probably be afraid to touch anything out of fear of receiving a lethal shock!
disconnect the power, then push thr power on button (helps discharge any stored energy) open it up, you should be able to see a big fat ass capacitor you can discharge this by using a multi meter or if you dont have one, bridge the pins with something conductive like a screwdriver with a plastic of rubber handle it should spark / arch then you should be good to go common sense still to be used of course.
