Fix it Friday - Adjusting Convergence Rings on a Cathode Ray Tube (CRT, Monitor, TV and Arcade) 

Real talk, thank you for actually taking the time to sync your camera with the refresh rate. Nobody else on RU-vid seems to know how to do that and it drives me nuts.

Best ever video about the CRT adjustments I watched. Action on magnets - the reaction of picture. Real-time! And it's only 6 minutes duration. Bravo. Now all my stuffs are on right shelves in my head.

Honestly, this is one of the best videos I've watched on the topic. Now I actually understand what's the relation of the rings in respect to moving them together or changing their spacing. Great demonstration!

Wow. This is the best video I've found so far that shows exactly what happens when moving those rings. GREAT! Thanks.🔥❤🔥

Holy crap, THANK YOU! I threw out a commodore monitor with this exact problem! Wonderful to understand what was the culprit now..

That really helped. I have two Commodore 1702 on the bench actually and from some other videos i looked, having this double camera setup and to see live action and how you manipulate the flywheel directly by hand really get me confident to mess a little more into that while keeping my hands away of the high voltage. I'm always affraid that the insulation thickness of the cable / air gap isn't enough while i'm working in there... and some said that the yoke coils themselves were high voltage but i really doublt about it.

Wow! this video was very very helpful! this was the most easy to understand convergence video i have seen and the only one i have seen that explains what each set of rings actually adjusts! im gonna go see if i can get my old 1985 Hitachi tv back into adjustment since none of the other videos i have seen point out that the front rings are for color purity and i think i got them way out of adjustment. Huge thumbs up!

I just recently tried this adjustment after watching this video with my 32 inch Sayno that the colors seemed off on…. It looks soo much better now… thank you. 🙏

Marvelous, thanks for this simple and effective demo!

Very helpful, thanks! I think he taught me more than he realized, namely 1. it is safe to put your bare hands close enough to the high voltage parts to spin the rings, 2. using a mirror or camera or something to watch the screen while you adjust. These are things he did not talk about, but, then again, no one else does either. I think repair guys leave out the basics because it never occurs to them that someone who doesn't know about convergence rings might also not know even more basic things.

2024 y estoy viéndolo con mucho asombro, gracias por este tremendo tutorial! Un abrazo desde Ecuador

This was a great video, thanks for the clear explanation. I am adjusting a 1985 Sony Trinitron with a Sony "Multi-RGB" input right now -- my biggest challenge is all the adjustment rings were glued into place and I had to use an xacto knife to separate them. Even now there is so much residual glue that it is very hard to move the rings independently. Still, I am getting a remarkably good pic for a consumer TV that was made when Back to the Future was in theaters.

Fantastic video - thank you very much!👍

Very helpful! Excellent video! RU-vid's algorithm is plainly dumb. I had been searching for a good video on the topic and this gem was here all the time.

Great video! thank you

Excellent thank you for this!

Great video, thanks for posting. That test pattern tool with the gun cutoff looks great, would you mind posting what the tool is called?

Thank you, this was helpful.

You are god of tv. Thank you.

what are you using to get those blocks?

I guess this works the same way on consumer CRT TVs? Thanks for a great video!

At 4:14 you bring your hand very close to the four connectors at the top of the yoke. I have been told those have high voltage running through them. Is that not correct?

I have a problem with my 1702 vertical position that just don't wan't to go high enough when turning the v-pos screw all the way. I looked at the schematics and that variable resistor is a 500 ohm in between two 470 ohm resistor that "sets" the workable range of that variable resistor. I tried to connect myself across one of the two resistor to add a temporary parallel variable resistor to see if lowering one of the two would allow me to get futrher in the vertical adj. range and sure enough, it does the trick. calculations done, i would need to swap a 470 resistor for a 120 ohm one. My only concern is the long term reliability of that fix as more current will have to go thru those resistor... I really don't know what kind of power they usually endure. The other way would be to increase the value of the other 470 resistance instead but to calculate its value, i would have to take it out, connect a variable one instead, set the v-pos pot to the middle position, set the temporary thing so the image would be vertically centered and then measure the thing resistance, find a proper match and weld that down into place. The two monitors I have suffer from the same problem where the picture don't get quite high enough. Would it bother much the resistances if i lower the value of the string a bit?

Very useful video. thank you. do you have a video on how to rotate yoke as my image is not quite straight. is it just a case of loosening the screw and carefully twist. is it OK to do while on if I wear rubber gloves?

I have a Trinitron with the blue/red convergence slightly out. Have some nice test patterns in 240p test suite but I'm not keen on poking around the neck of the tube while it's on😂 Is it that risky as long as you stay away from the lopt and HT cable?

The best video explaining the role of those famous rings. My question: I own an old Sony KV-29LS35B TV, everything is alright except that skin tones are not natural: there is always a kind of red/orange push (+ light purple or blueish lips). I have already tried everything in the service menu (change of RGB saturation values, change of Red and Green cut-off values but skin tones are still not natural). The other suggestion was to set the AXNT or AXPL values to 0 but there is no AXNT/AXPL to set off in my TV. Could this "Red/orange push" (also visible on LG CRT Tv's) be a problem of purity or convergence ? Thanks in advance.

It is worth attending, sir is there any method by which i can measure beam current of colour monitor?

Mr., I have a problem... On the left side of the screen, I can see the Red Phosphors above the other two. On the right side, I can see the blue Phosphors. It's like a X where red are above on the left of the screen, below on the right. The opposite for Blue Phosphor... This could fix the problem? I have another CRT TV where the Red Phosphor is below but it's constant on all the screen.

That's scary... touching stuff with your bare hands. I wish I was a little more knowledgeable so I could be less freaked out about opening up my CRT TVs... These videos are a good start I suppose. (Thanks!)

How do you safely work on this while it's powered on? I'm horrified to do this stuff lol.

Im sorry if i missed this part but how do you get the squares to appear? Is it an input you have to connect externally?

can I use the the gave itself to adjust the rings?

HI Create, great video ! I'm trying to do the convergence on my G07, is it normal to be able to set the center of the screen right but say the left and right be a touch off ?

Great video! But could you tell me where to get the test pattern generator you use?

I have slight double image on text is very visible and i have a bit more flickering than normal. What to do with that flicker ? The tv is Panasonic Qintrix

where do I get a dot tester to isolate the convergent and colors

Great video. I think I have a convergence problem on a 1978 sony trinitron. I've had the set apart and set all the knobs to get the best possible picture but still in a game like super mario bros there's like a white shadow to the right of all the images on the screen. Thanks.

How are you feeding the test signal?

how to you turn off certain R, G and B? Is that disconnet the R,G, B cable to the chassis board?

I just need basic instructions how to connect monitor to PBC board and haven't seen one yet disturbing

i have a 29 inch trinitron. it has a convergence and sharpness problem. do you think its safe for a novice to tackle? what are the dangers? what should i use to adjust the rings around the yoke? my hands? i really want to save the tv.

Helpful video, I made a test screen, all you need to do is make image, jpg, png with red, green and blue tiles make it into a looping movie slide show and burn it to a dvd, hook your player up and press play that's how I do mine.

would seeing very short red stripes coming off of characters in games be a convergence issue, its like certain colors stretch off of where they are supposed to be, if it is i guess i have more than just an overscan issue

Sorry for asking this question. For this convergence rings adjustment do we still need the discharge the tube? Thanks

What is the name of that machine you are using to fix the convergence?

what would you do if there is only a slight convergence and geometry problem in one of the corners (top left in my case).

How to adjust the vertical and horizontal alignment , my crt screen looks out of bounds

Witch high voltage spots should I avoid touching ? thanks for any help!

Should you really have both your hands in there like that without any protection?

First, purity. Second 4 pole, Third 6 pole. Is not it? Thanks.

is there a site where we can download the test patterns? thanks for this great video!

how do you get test patterns and how to have them hook up? im having colour image distortion on 2 spots of my 1991 Magnavox perfect view

Hi, I think I have the same problem with my crt, but it doesnt seem it's on the entire screen surface, do you have any suggestion for me? should I adjust convergence ring or should I look for another solution?

is there a site where we can download the test patterns? I have 6 rings on my old arcade monitor ! thanks for this great video!

Can you just do that with the picture? And how do you get that screen

And how to adjust convergence on monitors without convergence rings?

Hi,if you could how do that with a nanao 2930 (with the 15/24/31 khz),my 15 khz is almost perfect (just a little red under ligne but not on the corners),my 31 khz...not good..too big..very strange convergence (better if I use the jamma 31 khz not vga strangely). I hope to use all the resolution soon. Thanks.

My tv is a sony wega with up to 1080i capabilities, but a was attemting to move it but the screen tilted like 10 degrees, any help?

For real, man, what's the source of those colour patterns? They'd make this job infinitely simple

Huh. I guess now I know where synth-trip pop band Purity Ring got their name...

Looks like the solution to my problem. Just a little worried to try messing with it, I heard these thing can straight up kill you if you get shocked by touching the wrong part.

You call that 4:30 aligned ? Please.

This is totally wrong, I’d suggest you read a service manual set up of purity and convergence. The purity is set in conjunction with the yoke positioning. There’s so many amateur people working in crt equipment that think they know what they are doing. Read the service manual set up and do it correctly. This is just a bodge until it’s nearly correct, another issue not mentioned is the set should be positioned east west during set up as to minimise the earth’s magnetic field influence!

how dangerous would it be to adjust the purity rings? mine has the red off by just a bit and the entire image is twisted.