CRT PVM ... Purity Rings ... Discoloration Fix without Degaussing?
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- Опубліковано 9 лют 2022
- In this video I demonstrate the affect of adjusting purity rings on a Sony PVM-1341 CRT monitor and adjust them to fix some discoloration / purity corner issues.
- Ігри
Thanks for reminding me to actually check the purity rings on the pc monitor I just got, since it has two corners out. I was gonna order a degaussing wand but I really should do my due diligence first.
I don’t understand why you don’t have about 100x more subscribers - excellent and informative video as usual!
Thank you!
Hey thanks! This fixed the issue on my KV-20FS100 ! Upper right was discolored and no amount of degaussing would fix it. Sure enough adjusting the purity rings fixed it right up. Had to correct the geometry in the service menu after but now its looking fantastic.
Thats awesome to hear man! Most techs will say to never touch purity but it can fix some issues when all else fails.
Good job!
I have the same problem, after you made the adjustment, the corners never discolored again?
Solid info.
Solid video, thanks! So you got the colors down first, and then with the tabs together, you figured out where they needed to be to get the best geometry results?
I really just eyeballed everything untill the colors looked the purist and got rid of my purity blotch while I was at it. I noticed while doing this that geometry was being affected so technically could be used to tweak some bowing on screen possibly solong as the rgb purities are whithin a range to be adjusted.
To get it really good you would want to adjust geometry through your serv menu or pots again afterwords using 240p test suite and fine tune your rgb drive levels, better yet a colorimeter
Well this is interesting!
Thanks for the inspiring video! Do you have any ideas on what tube components might correct the horizontal rightward astigmatism of a CRT? Maybe, there are some more common terms for this problem, that I could google for? Rightward tail, trace from any objects on the screen. The image seems to fade out to the right.
Check out my video on the 1341 recap.
It had wavy vertical lines and also bright objects would smear and tail to the right.
A deflection and power circuits recap fixed the issue I was having.
If its an older crt that seen alot of use a recap can clear up alot of issues with stability and geometry
@@LameGaming thank you very much! Hour ago I was almost sure to have found the problematic area in the schematics to intrude but luckily I saw a used cheap old-fashioned VGA cable on sale nearby right from the late 1990s. People! Never trust modern manufacturers. It worked. The smearing's disappeared. Right now I am staring at the screen and can't believe that CRTs are not produced anymore. I enjoy the picture very much! Dell p1110.
@@YuriKovalyov awesome easy fix lol 👍
Thanks for sharing. I got a 32 inch toshiba af that I turned tate. It developed purity issues on opposite sides once I moved it. I'm wondering if a nocked the rings loose when I moved it. I think I will give this a try before I buy a degauss coil.
Ive found most consumer sets glue the rings down but its possible... Ive never been inside a Toshiba, I have a little 14" af but never had to open her up.
Let me know what you find.
@@LameGaming yeah. I will got back to you. I got a lot of pots on the stove so to speak right so it might take awhile for me to get around to it. For the moment I just tape magnets to the side which works fine. I'm thinking about making my own degauss wand out of a degauss coil from a junk tv.
@@riggel8804 make a vid on the degauss coil if you do, i thought about doing something similar.
@@LameGaming yeah I think it would make a funny video. Crts have really dried up in my area and I straight up can't find one right now. I think i need at least a 27 inch crt since I'm trying to degauss a 32 inch crt but maybe it doesn't matter what size the coil is.
@@riggel8804 I see them everywhere but at this point people treat them like garbage. Found a 27" late 90s curved sony kv down the street tube down on the sidewalk, another 32 in sony and flatty toshiba af busted up at one of them clothes drop off bins... Looks like someone just pulled up and threw them off a truck, and a 27" sanyo flatty busted up next to a residental dumpster in the mud. Pretty upsetting that they just didnt post them for free on fb and leave on porch at least for a week to see if anyone wanted them. I would of rgb modded, recapped, and rehomed them
is messing with the yoke and rings 1 zap = dead or is that just the anode, also what kind of gloves is being used here? thanks
A live crt anode will be tens of thousands of volts,Around 1k volts per diagonal inch of screen size, the large power filter caps are also dangerous.
Vertical deflection voltage is relatively low but horizontal can be 80- 150v from what Ive read depending again on tube size.
Ive read the only deadly components are a live or unbled anode or charged power filter cap.
Dont take that as fact though, I hold no liability do not try this at home LOL
The gloves are cheap mechanics gloves and probably do no good other than give you fake sense of security lol.
I have lineman gloves but they must be covered by another glove to prevent holes and by then they are bulky as hell but those are the correct gloves to wear if the rating is high enough and they are free of punctures
You can safely manipulate the rings by hand, but you should only be using one hand. Using both hands in an area with high voltage can lead to a very sad story if you accidentally touch something with high voltage running through it.
I made a degauss coil last weekend and ended up putting a video of it on my channel. Check it out.
I definitely will when I get home from work (3am 😖)
Thanks for the update!
@@LameGaming yeah buddy.
Swing shift alright. you get to sleep in.