Adjusting CRT Convergence

[@PaulHindt]

I man-handled my yoke with the power on before the warning at 1:50 in the video and am now dead. Thanks, Steve.

[@dnn86]

Rest in peace, bud. Since you're dead and all, can I have your CRT? It's what you would have wanted 🙏

[@ryancat001]

Hey Steve! I have a Sony 2004 KV-FS120 and it needs a yoke adjustment and some purity calibration. Thanks so much for your help making it so easy to learn with visuals and everything. Now I have the confidence to get back there and do it myself (and yes I watched your safety video)

[@Synthematix]

Why do people only post videos on sony pvm's? theyre the least common crt of them all

[@趙溫]

same reason most news are about celebrities

[@FR4M3Sharma]

This was really well explained. I was looking at some tutorials because I need to adjust the Focus and Convergence of my CRT. Thank you.

[@MysticMage255]

Appreciate the work done to keep old tech like this in tip top shape!

[@RetroTechUSA]

Thanks

[@HaraDayaful]

Thank you so much for sharing your knowledge of CRTs. Info is hard to come by, and knowing of the high voltage dangers I've never dared really get into one. I've been able to fix a dim blurry monitor into a very capable one with your videos. The red convergence setting was off.

[@AndehX]

horizontal linearity issues are really the only issues I can't seem to fix. Nothing I've tried has had any effect on the linearity of my BVM. The service menu controls to adjust it don't seem to help, they just move the "faulty" area left or right slightly...

[@sullah1986.]

Hi, what BVM do you have ?

[@ralph8237]

Hi Steve, what a great channel :-)! Why I found you, and why I will follow your from a now one for a long time: Recently I picked up an Sony Trinition KV-25X3D from my parents home (I'm in retro tech here in Germany since 25 years), which was located for over 20 years at the guests chamber. It was rarely in use, I would say "close to never". Besides the dust at the inside it looks and feels like new. I removed all dust, cleaned it, resoldered all high voltage and high power areas I found on all PCBs and started to calibrate it. The colors are brilliant, and about 90% of the screen is perfect. For one area, top right, it is impossible to get all 3 colors aligned, without killing the alignment of all other parts. My dad, meanwhile at an age of 75, was a professional Radio/TV/Hifi employee in the 70s (later he switched to Digital Equipment Corp, you maybe know them, away from CRTs), and he and myself tried to adjust the colors, with the horizontal/vertical alignments directly at the tube and the tubes boards. After hours, the issue is still the same. He told me about magnets, which were added back in the days to the back of the tube, to compensate geometry issues, but in his memories, this could not fix color issues like this. Long text, short question: is any tube in "good condition" able to be calibrated in a specific war, or is it possible, that this tube will never back to about 100% of its old quality?

[@SteveWellsNZ]

Hey, I've got the same issue - you ever get this worked out?

[@Charlie-Cat.]

Alright. Part 2 is up and running to help maintain my unit even further. Glad to see the continuation of this Steve. Hope you and your love ones had a great Thanksgiving bro. 8^) Anthony..

[@RetroTechUSA]

Thanks Anthony. We had a great Thanksgiving, hope you did also. Lots to be thankful for.

[@billybob884]

So I've run into a little roadblock here; the purity, red/blue, and green/magenta rings on my set are glued together from the factory and I can't seem to get them apart to adjust the convergence. Any tips for getting them separated? Thanks for your help

[@christopherbragg6643]

Oh my, me too! Trying to find out if it's safe to pull the glue off. I'm guessing it is, though it's not an area I want to guess haha

[@shankarsm2849]

Use Thinner For Remove The Glue..

[@OneeGame]

Please, tell me, what kind of high temperature sealant do you apply to the magnetic rings and to the tube?

[@DasAntiNaziBroetchen]

Omg yes! Nobody seems to know what was originally applied and what to reapply!

[@OneeGame]

@@DasAntiNaziBroetchen Yes Yes! I really look forward to a video where the author will tell you what kind of tool it is!

[@GoldSrc_]

You can use silicone if you want, not hot glue or any other glue.

[@GoldenMean743]

I heard from somewhere that some manufacturers used paint. Not sure what kind.

[@OneeGame]

@@GoldenMean743 😲😲😲

[@RazorEdgeBullie]

Hi Steve, would love to see this kind of maintenance work done on a consumer CRT. Perhaps the D-series ya got there? Thanks bud, you're awesome!

[@RetroTechUSA]

I'll be recapping that D series soon! I just need to find a good remote for it.

[@RazorEdgeBullie]

@@RetroTechUSA awesome! I'm about to recap my av-32D200 and I also need to adjust the convergence rings and yoke so I'm very much looking forward to watching!

[@EnricoFermiTheThird]

Thank you so much for laying this out so clearly.

[@V530-15ICR]

11:56 suspicious text on the screen

[@TapesNstuffS]

How do you remove or loosen the original glue? I've tried tugging twisting and prying but they are really bonded.

[@adamfrank1885]

Hi Steve. What compound can I use to secure my convergence rings in place after I've made my adjustments?

[@jimg7423]

I have a wide screen panasonic that is sharp in the middle but blurred on the sides. Would you have an idea on how to fix that condition

[@EvertvanIngen]

7:16 "Attack" Cracked me up 😆

[@OneeGame]

Thank you very much for your advice! Thank you.

[@josefranco7590]

Thanks for this! Just got a consumer Trinitron that I need to clean out so I figured I'd do an all-around convergence adjustment. Is it yoke then rings then magnets? Just want to make sure my order is correct...

[@CobraTheSpacePirate]

Hi, Steve. I have a Japanese KV-28DA55 that I have been setting up. I adjusted the HSTAT and the focus and now when ever there grays on the screen they are perfect but bright colors like yellow or orange and blue form some diagonal cross hatching pattern. In service mode if I set CTRAP to 0 it looks perfect! But even if I save it, when I turn the TV off and on again, CTRAP gets reset to 1 automatically or something and the x pattern show up where ever the colors are.

[@RyukikuriORI]

You have to save the settings, most likely by pressing muting and then enter

[@SpacePortArcade]

Do you have a video on dynamic convergence?

[@juanrodriguezluis4811]

Hello Steve, i follow you tips and repairs on this Channel. They are amazing helpful. I'm a proud owner of a Bang & Olufsen mx8000, but i have problems with H stat convergence. The H lines are not parallel and i notice a annoying barrel effect trough the screen. Do you know about this model? I'm thinking to recap this TV.

[@TheAlessandro08]

I can't adjust the horizontal overscan with H Stat right? I have a Panasonic and it doesn't have a Hsize option on the service menu, any tips on how I can overscan it so the picture fits the whole screen?

[@jakep8484]

Hi, great video thanks! What is that caulk that you recommend and where can I buy some? Also I need to find around a 7 ohm ptc for a degauss circuit, just thought Id ask if you have one or know anyone that has one to sell, thank you.

[@doomisforu]

Hey Steve 2 things.1. the glue on mine is really hard, I don't want to break the rings can u use something to loosen it. 2. Do you have a like to the glue u use to reclose the rings

[@DidoInFlames]

Hello my tv doesn't have convergence rings . What to do and how to adjust it. Text is doubled.

[@dudeguy7347]

How do I move the picture left and right or up and down if I dont have a service menu

[@RetroPCUser]

Is it safe to do the convergence adjustments while the set is tirned on? I have a 19" Emerson VT-1920N that has convergence issues and I don't have a service manual for the set or the actual remote for it either.

[@justiniadonisi9290]

Do you know if this would work on a 1982 front projection CRT?

[@Zeltor]

Would you say/recommend hot glue instead of caulk to set the rings in place after tweaks or is that a no go? And what kind of caulk do you recommend Acrylic or Silicone? And where could one buy decent yoke wedges/stoppers.. I can't find any except some weird looking rubber after market ones that look like doorstoppers. Also I would like to voice my appreciation for your channel and all you do, I've been collecting CRT's for a few months and this channel helped me learn so much about servicing them.

[@thromboid]

An NEC CRT service manual seems to indicate TSE385 RTV silicone.

[@thromboid]

Maybe disregard that - that might be for sealing the HV terminal.

[@christophermoffitt1988]

Hey man I have a JVC with a d series tube, round glass with component. Really my grail tv but it has a slight green hue too it. Is there anything I can change or adjust in the back of the tv to correct this?

[@coolduder1001]

How do you know when it's too close to the tube?

[@emondrag]

I just bought an Apple Color Display M1212. The image is cut at the bottom. Took it apart and played with every adjustment in the back. No luck. If you could suggest anything, I’d appreciate it.

[@VintageElectronicsGeek]

You have a source for the convergence lens? ~Jack, VEG

[@jaimeb.384]

I changed my tube yoke and the red grid happens to be smaller than the green one, any hints or tips on how to solve this?

[@mydecembermydecember]

Hi Steve, I’ve been really enjoying your videos. I have a Trinitron what needs a bit of a service. It has had a bit of a drop in the past (dent in the bottom of the case) and had both minor convergence issues, and as well doesn’t show blacks rather a dim red screen when it should be black. I’m looking for someone to service the set and wondered whether you might know what an acceptable ballpark figure might be for such a service? Hoping to find someone in my local area but don’t want to over pay. Thanks!

[@Double0steve0]

Could anyone give me advice on faint but noticeable horizontal lines running up the screen and also when there is no video input the screen looks more dark green than black. Tv is a Sony kv27fs100L.

[@Double0steve0]

Also live in Southern California if anyone works on these

[@garettrobichaux]

Hi, i found your channel because i am looking on how to calibrate and adjust my R40xx raster scanner monitor for a Raytheon radar. i cant center the radar onto the middle of the screen. also i cant get concentric rings on the display. any tips?

[@DidoInFlames]

Does it need to put epoxy at all cost or can be something else ?

[@StRoRo]

Is there somewhere you can buy the cap kits?

[@RetroTechUSA]

I have kits available for about 1/2 the PVMs out there. Which Monitor did you need a kit for?

[@StRoRo]

@@RetroTechUSAPVM 20M2E

[@Lifeless11111]

Im wondering about those plastic rings on the back of yolk ,i moved one of those by accident when dissasemblying for repair. The crt works fine it just has maybe 5 pixels in upper left corner missing in like a soft angle. Do those plastic rings do anything? or can i just adjust it in service menu? thanks Oh never mind i just got to the part of the video you talked about it lol

[@SuperMikeFender]

The yoke on my CRT seems to be bonded very securely to the tube. The picture is great. Not tilted, just missing some of the picture off the right side of the screen. I've already tweaked it a little using a little potentiometer wheel I found on the circuit board on the back, but it's not quite enough. Do I need to remove the bonding from the yoke to make any adjustment? It only needs a little! Very frustrating. Great channel by the way.

[@badreality2]

Do you know what kind of epoxy was used?

[@SuperMikeFender]

@@badreality2 No. It's white. Doesn't even seem to have a spongey bit underneath either, just the legs attached straight to the tube with a large amount of the bond in between. Looks like it would be a real pain to try and cut or melt off. And the picture is really not bad.

[@pcdata76-yt]

Don't bother with the yoke if you don't have any purity/convergence or tilt issues. You need to tweak horizontal size and phase from the main circuit/deflection board on analog or from service menu on digital chassis sets.

[@SuperMikeFender]

Thanks for the replies! I think there’s nothing more I can do then. I already improved it with a pot I found on the circuit board and since it’s from 1980, there’s no digital menu.

[@georgealibinisis4816]

great work! I just recapped my Commodore 1084s-p1 monitor but it also needs one degree tilt adjustment anticlockwise (as you see it from the front).. is it safe to turn the yoke one degree without the need to re-adjust all these parameters (convergence, etc)? - EDIT: I did it and seems to be ok. I noticed that there are 7 rings... three sets of two as expected and a 7th single ring right behind the yoke. What is that one for?

[@StephanieHua]

Hey Steve - what can we do to “break” the factory epoxy on the convergence/purity rings? Is it ok to just use force and break it off?

[@Piston1776]

What kind of caulk do you use?

[@knucklestheechidna5718]

Man I looked this tool up and it was like $1,000 man. That's just wild I got this TV for 20 bucks I'm just going to call it good lol.

[@bizzie337]

What part of the crt you shouldn't touch while it is powered to avoid getting an electrical shock.

[@joshmiller887]

There is a bunch of stuff to avoid. Anything with exposed copper is a huge safety concern. Stay away from the fly back while it’s running, and the power supply. It’s risky working on these things. You need to be extremely careful!

[@bizzie337]

@@joshmiller887 thanks

[@GoldSrc_]

The (sometimes) exposed wires on the yoke, that big red wire with the cup attached to the CRT, the back of the CRT board, and any heatsink in case is a "hot" ground set. And just about any part near the fly back. But still, don't go poke around anywhere if you don't have an insulation transformer.

[@bizzie337]

@@GoldSrc_ thanks

[@elu9780]

So, it is safe to do that kind of thing? My own monitor (LG F700P) needs adjustment because of color fringing (ghosting-like kind of stuff to the right of everything). I am afraid of getting shocked, so I've not done it yet, so I want to know what is and isn't safe to touch in a CRT monitor while it's working.

[@sanjeevkumargupta6551]

Very nice video.Thanks q lot

[@VIDKID666]

This is fantastic. Thank yoy

[@halo3odst]

Okay, so most lessons i see tell you to only work on a CRT when it is off and discharged with the anode line connected to ground. Yet i also see all of these videos of people going all over the place with the CRT on. Is there a good video somewhere that specifically shows you what to avoid touching?

[@fatjr.6287]

Anybody knows the equivalent model of sony kv-14bmr1? I tried searching the internet for service manual or schematic but i just cant find the model.

[@Demokirby]

So you have a link for the chalk you use? Also what do you use for wedges/convergence strips that lost their stickiness?

[@badreality2]

You meant to say caulk...

[@whalahiguy]

Can you please do a video on the commodore 1702 monitor, these are so helpful and insightful. My monitor has a slight rotation in the picture and I noticed today playing some side scrollers on NES that the sides and top kind of warp the picture (bigger on the outside, regular size in the middle)

[@SaglamSerdar]

The most useful Crt Tv topic I've ever seen. I had an incredibly strong electric shock 27 years ago, out of curiosity I opened the inside of the Crt TV. Although I did not take any physical damage, an incredible voltage passed over me :D Does the electric current not affect you? I'm asking because I don't understand the language of the video, maybe you answered.

[@andree1991]

Did you open the TV while it was plugged in? Please let me know cause I'm thinking of opening mine and if it shocked you while it was NOT plugged then that's a massive risk I'm not willing to take .

[@SaglamSerdar]

@@andree1991 Electric shock happens even when unplugged. You need to discharge the electricity. Please see the videos about it.

[@andree1991]

@@SaglamSerdar Damn bro. Thanks for the tip

[@isaacchavarria4026]

100% agree. What a supernatural degree of expertise! Maybe adamantium bones ground him?

[@garyr7027]

I knew a real big guy once got practically thrown back messing with a older TV when he didn't know what he was doing. Learn how to drain crts before working on them, what to do and what not to do... these things can be dangerous.

[@magnum333]

Your channel is amazing! I hope you're doing well. Is it dangerous to adjust the yoke while the tv is powered on? You seem to touch the copper wires, isn't it dangerous?

[@alanwong3980]

Hi there, Is that monitor for sale? I have the PVM 1454 QM. It never been recap. I hope you near.

[@gio0042]

Only sony televisions have the service menu?

[@perroblanko4752]

Quiero arreglar la convergencia de mi Sony kv-27fs13 ayúdame xfavor a solucionarlo 🥹😭😭

[@Exularoye123]

No veo colores solo blanco y negro q puedo hacer?!

[@comicszoneuniverse]

I JUST WANT A REPAIR SERVICE.. THIS IS TOO HARD...but I live in spain and found no shop or profesionl who is able to do this.. ☹

[@CozyCathodes]

Awesome vid👍🏻

[@billwilliams6338]

RETRO TECH, Why does monitors use a B+ voltage set at 130vdc for what reasons? because the H&V oscillators need +130vdc but not sure why. Any reasons why the Horizontal sync is at 15.975Khz and the vertical sync is at 60hz, why are these the TV industries standards? The Screen adjustment and Focus Adjustment are a High "Negative" Voltage to the grid and screen grid of the CRT tube but its a Negative voltage? Any reasons why they use an isolation transformer for floating grounds on the monitors circuits boards why would u want floating grounds on your monitors circuit boards?

[@DasAntiNaziBroetchen]

"Why is the vertical sync at 60hz" Cuz of mains voltage. 50hz in Europe. "But why 50 or 60hz mains voltage then?" Cuz. "What is a negative voltage?" Think of voltage as a potential. 150V is 50V in relation to 100V. 100V is -50V in relation to 150V. *That's it.* "Why they use an isolation transformer?" It's much safer in case you get electrocuted by it. Also the answers to most of your questions are easily google-able and are well documented. I only gave a brief summary because this comment is one year old and you likely aren't even gonna see it.

[@rohiteugenemurray7879]

Awesome job.

[@juanmena3648]

Hi there. Long time fan of You and Artemio Urbina (mi paisano!) and I really, really respect what you and Artemio have been doing all these years for CRT monitors as they're sacred "vintage" modern treasures to this day... But I can't help but tell you that, if I close my eyes while listening to what you're saying in this video, you kinda sound like Trump. Haha!

[@alessandrafatar6401]

Bem RGB scanlines bonitas gosto perfeita 😘😍

[@alessandrafatar6401]

Scanlines lindo até bem mais

[@kanuh]

omg a CRT savior

[@GoldSrc_]

You should check out Jordan Pier or Shango066 if you want to see some cool CRT work and resurrections.

[@MrDrewseph]

I don't think every crt has h-stat Certainly a few of my older ones don't

[@RetroTechUSA]

You are right, not all have it.

[@pcdata76-yt]

It is a feature of Sony or other trinitron based tube monitors/tv sets only. On non-trinitron tubes, horizontal static convergence is also set by adjusting the rings.

[@jp9403]

Powered off is not enough. It needs to be unplugged and the capacitors need to be discharged or it'll zap you

[@guregu1977]

Anybody living in Tokyo That could do that for me??? I’m having a hard time with my crt’s convergence!!!

[@thepostalteenager2206]

Why every Sony TV fucks up,and the knock off ones with simple chasis stole from PAL Goldstar and Samsung tvs are not broking

[@guregu1977]

Anybody living in Tokyo That could do that for me??? I’m having a hard time with my crt’s convergence!!!