/diy/ - Do It Yourself

really? no one has any clue?

>>469971
It's broken

Get a new tv, the stuff inside crt's is dangerous.

A line across the screen usally means that the verticle yoke coil (or steering coil) on the back of the tube is nonfunctional.

>>469973
>>469974

ok boys. thanks.

i need some insight so i know what to look for. fired circuits on the mother board?

>>469975
so plan of action?

what need to be checked?

>>469978
nothing its dead
dont fuck with crts unless you want to be dead too

>>469975
plus the line is shorter than normal meaning the high voltage section has stopped working properly.

>>469978
your most likely solution to problem is to replace it with a new one but if you are not able to find the coil for your model online you could try to manually rewind the coils but it is unlikely that you will succeed. Aslo the coil is on the back of the tube it is a shiny copper colour, you could see it in the image I posted.

>>469984
can this be fixed?

I'd give up at this stage and recycle it, rather than attempt to repair what is an extremely dangerous thing to fiddle with, and that's coming from me who's used to working on electronics. It's just not worth it.

>>469986
awesome

will try

>>469984
>>469987
oop's didn't notice that, op just get a new tv

>>469990
out of the question

>>469989
Post pictures of it working if you are still alive when it's done?

>>469992
will do

>itt: suggesting the one part that is most unlikely to have broke.

op, its the vert/horz circuitry thats shot. since both vert/horz is messed up, there is a part(s) in that section on the circuit board that is not working.

>>469967
Before you crazy with this, I'm going to tell you something that sounds like a broken recor... err a skipping MP3. Replace all electrolytic capacitors. Tube TV's use a boost capacitor for the vert. It should be around 170V and 47uF. If your yoke were open or shorted, the x-ray protection circuit would shut it down. It would also help to know the make and model of the TV.

>>469967
It appears your problem is you are stuck in the 90s and still have an outdated talking picture box.

To fix, move here to the future and get a flat screen tv. One the size of that hunk of shit will barely be over $100 if you look around, and look 1000x better.

Or you could kill yourself fucking with the high power capacitors in the CRT (Protip: even if it is unplugged you can still get electrocuted and be very very dead.) Even if you won't die, you won't fix it, this is apparent by your overwhelming display of ignorance. And you will likely spend more on repairs than on a cheap as fuck yet still completely superior LCD.

>>470042
Protip #1: You could discharge the capacitors easily by connecting a high wattage resistor across their terminals.

Protip #2: Flat screen TVs are more easily prone to failure that CRTs.

happen one many times with those things

you wont believe me but i just hit that thing in one side and shits works again

if donts works try another side

has worked for me like 100 times no joking

at last try

clearly your tv is challenging you to a lightsaber duel

>>469967
I used to fix this stupid problem all the time, there is this set of two fuses on the board and one blew out.

Figure out which one is dead and pop a old glass car fuse in its place.

Note: it may be covered in heat shrink tubing which you'll need to cut with a razor. Also don't discharge the tube into your arm (the big red wire going into a suction cup thin) because that's the thing that'll shock the shit out of you never mind the caps.

>>469967
i had problems like that with a few panasonic tvs. due to the way they made the main board mounts, the circuit board starts to bend from the heat over time and causes broken solder joints. remelting/resoldering all the broken joints always fixed the problems.

i hope you turned it off as soon as you saw the line:

http://www.repairfaq.org/REPAIR/F_monfaq7.html#MONFAQ_002

if not you're burning the fuck out of the phosphors in that section

DO
NOT
FUCK
WITH THE INSIDES
OF CRTS
DO NOT DO THIS EVER

>>470147
This, play it safe and live another day OP.

>>469967
It looks like there's no vertical deflection. There could be any number of a long list of causes of this problem, none of which are easy to diagnose, especially if you have precisely zero experience with electronics.

Since you have zero experience with electronics, this is not something you should tinker around with. CRT TV's have anywhere from 120VAC (or higher, depending on your country) to 30,000VDC, and everything in between, inside them. There is not only a serious shock hazard, there is a fire hazard if you screw something up worse than it already was, and something (often literally) goes ka-boom. I've been an electronics tech for over 30 years, and worked on tons of TV's and CRT video monitors, and *I* don't even like working on them because of the high voltages involved. I'd suggest you either take it to someone who has experience working on this sort of thing, or plan on getting a new TV (best plan).

Your problem is the yolk on the back of the crt tube. Step 1, remove bezel. Unscrew crt screws, remove crt gently. With gloves, handle that collection of circuitry that collars the back of the crt and twist. Problem solved.

in the back of the CRT are 2 electro magnets that manipulate the path of electron through the tube. if one is burned out then you will get a flat line, if theyre both burned out you will get a dot

>>470189
>remove CRT completely
>twist off the deflection yoke

o not bothering to tell the OP how to discharge the CRT properly before handling
o removing the CRT is completely unnecessary
o "just twisting" the yoke will probably snap the neck off the CRT (they're clamped, and often bonded to the neck)

What's next, asshole, you going to tell him how to make pretty, pretty crystals using household ammonia and bleach and inhaling deeply near the mixture? Go back to >>>/b/, or better yet fucking kill yourself instead of trying to kill the OP. Asshole.

>>470198
Deflection coils usually don't burn out, the IC driving it will first.

>>470006
this

>>470042
>>470055
It's not the capacitors in a CRT which are dangerous, it's the flyback transformer. It can store inductive energy for years, and unlike the capacitors, doesn't have a bleeder resistor.

>>470220
>it's the flyback transformer
*sigh*
No, that's not it either.
The FBT is just that: A transformer. It doesn't "store" anything, except when a switched current is applied, like any other inductor.

The CRT on the other hand, is one gigantic vacuum-filled high voltage capacitor. I've picked up CRT's off the shelf that have literally be sitting there for *years*, with a thick layer of dust on them even, and gotten zapped by them. *Always* discharge CRT's by using a long bladed screwdriver connected to one of the mounting flanges of the CRT with a cliplead and reaching under the anode cap with the blade of the screwdriver, using the blade to pop the spring clip off the anode cap. Then unclip the screwdriver and clip the cliplead to the anode cap and *leave it that way* for as long as the CRT remains unconnected to anything, because otherwise it will begin to accumulate charge again all on it's own (don't doubt me on this).

Time to unplug the drivers and make an RGB oscilloscope.

>>469967
not trying to be a dick, buuuuut, unless you live in a third world country old crt tv's can be had for free basically anywhere.
Everyone is using flat screens now and these are considered garbage

>>470211
Oho! Look at those hackles!
Yes, twisting the yolk will break it. That was the idea. CRTs are junk.

I was employed by a company who dismantled electronic equipment, and did a lot of crt case removal in prep for the Pride workers to take care of the yolk removal and packing. I was untrained, with air tools, no respirator, working on crts, so that a simplified workload could be passed to retards. None of which were injured or died.

Crts are not going to kill you. If you discharge the vacuum from the tail, it's a nonevent. If you pull the yolk straight out, you just pull it off the prongs. If you twist, you may pop the tail.

Now if you crack the tail and breathe in the fumes and particulates, that's no good.

>>470232
>Oho! Look at those hackles!
Summer child, please leave

What's with all the hate and the hissy fits against trying to fix something?
If you're not in favor or fixing something yourself, then please leave this board.

>>470232

>>470232
OP was asking how to fix his TV. You're teaching him how to damage it even further by removing the vacuum seal.

Nice troll.

>>469993

I wonder if OP is still alive.

>>469967
just accept that the enclave has taken over

You clearly have multiple problems here. For one, there's no vertical deflection happening. And, as others have pointed out, the line doesn't stretch all the way across the screen so there's something going on with that too.
Try this: Hit it. Really. Give it a good whack. If it jumps back to working for a split second, then it's a loose contact somewhere and you should go over it with contact cleaner and look for broken solder joints. If that doesn't do it, then try and find a repair manual for your TV with a schematic. Look for components common to both the vertical and horizontal deflection circuits, since both are not working properly, it's likely that one component is the root of the issue.

Get a new tv at good will for 6 bucks.