How To Do General CRT Service And Repairs: Geometry, Convergence Etc An Emphasis On Flatscreen Sonys
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- Опубліковано 2 сер 2024
- One of my CRTs was in need of service. While servicing this particular CRT (KV-36FV26) I walk you through the service process.
0:00 Tools you will use.
05:39 Showing the baseline issues with this CRT prior to service.
15:49 How to use the service menu.
25:14 A word on safety.
28:22 How to use a screwdriver to adjust potentiometers.
41:47 How to use magnets and convergence strips.
48:26 How to discharge a tube and how to add dialectic grease (Used if you hear arching/clicking sound coming from your anode cap.)
52:45 The results of this particular repair.
Here's a link on more service menu info.
www.neo-geo.com/forums/index....
Here is a link on how to correct vertical bowing (wish I would have done this for this tv).
• Sony Flat Trinitron RG...
You have a 4th set of rings to play with. The first three sets right on top of each other are purity, Red-green convergence and red-blue convergence... I think. Anyway that 4th set further back on its own helps with vertical bowing. Move them away from each other or closer together and you'll be able to straighten the top and bottom of the image. Don't seperate them too far! 8mm maximum. My Trinitron came with that same bowing. The problem you thought was mainly to do with Vertical position.
Yes! I saw a video of someone demonstrating this recently. I have been meaning to do a follow up video demonstrating what you explained in this comment. How did you find out about the bowing fix?
@@riggel8804 I found the service manual online for mine. It showed the bowing problem as a diagram with the two magnet rings next to it. But with the wording around it, it wasn't quite clear what they were for because it was all next to convergence stuff and talking about the other rings too. And they were called 'blue' magnet and 'green' magnet to further confuse things. I eventually just tried it and sure enough that was the result.
@@lullylew9083 awesome. Thanks for getting back to me. I pinned your comment.
Just picked up a 27FS13 and I'm blown away by the amount of service menu adjustments. I really didn't think I could get the wonky picture on this thing straightened out but I was ultra surprised! Everything is straight, full and centered now (thank goodness for my years of adjusting home theater projectors...). I'm about to attempt to correct the convergence in the corners now. Thank you for the awesome tutorial!
I have the same model!!!
super helpful and easy to follow guide for someone with minimal CRT knowledge (me), unfortunatley it may have wrinkled my smooth brain.
lul same
Prett cool you hang with your dad while messing with these crts. Looks like a fun time. But you need to get yourself a big mirror from the thrift store so you can eyeball these adjustments by yourself though! Much respect for dealing with these giant 36ers
Yeah it's nice working with my dad. When I was younger we would always bicker when we worked together but now we are both old and don't care.
I've tried using a mirror before and didn't like it. Plus the old boomer is cheap. He works for beer.
I'm the only gamer in my family i do share a big car and sports passion with my dad but he doesn,t give a shit about videogames too bad i hope i can convince him too play something with me sometime.
Amazing video! Though I would love to see a video dedicated specifically to the Yolk. Talk about the safety of the yolk. How to hold it, how to hold it even if there's no plastic around the coil without getting hurt.
How to adjust it, set it and secure it even if you do not have a partner to help you out.
Then the other video, would be CRT symptoms. List the common symptoms and uncommon ones and how to tackle and look for each one.
you mean the yoke? 😆
@@magnum333 yes
Probably the most helpful crt tv general service video I've seen thank you for this.
This is a definitive video on crt repair. Thanks!
This is great information! Thank you for taking the time to share your expertise.
I can't tell you how many times I've come to this video as a reference while calibrating my sets. Love your videos bro
This video has been a treat. Thank you!
This video and the link you provided are incredibly helpful. Thanks!
Man, you are one of a kind and your dad too. Ty ♥ for existing both of you
wow bro....amazing guide. thanks to you and your amazing dad!
This was such a nice video to watch, and nostalgic as well. Thank you and your dad for it, God bless you guys and cheers from a guy in the distant land of Montenegro
Thank you and your dad for both your time, effort and risking your lives to show me and others how to do these things! I still have my KV-35XBR48 and I do believe that I need one of those magnets as the top left corner is a bit droopy even after using the service menu. Dielectric grease did work for that CRT TV, but as for the red convergence issue, it is an extremely common thing for just about every Trinitron CRT as every Trinitron CRT TV that I have owned has always had at least some amount of red misalignment issue while for some shadow mask TV's, this wasn't as often a problem. I believe that the reason the red gun happens to go out quicker than the green and blue guns on Trinitrons more likely than on other mask types from what I have found (even ones used very heavily) is because the red gun requires a higher beam current compared to the other 2 colors. So if the red still looks a tiny bit misaligned after doing whatever you could, don't worry about it as it's most certainly the best that the red convergence will get. Again, I cannot thank you and your dad enough!
Haha glad to hear from you! I will tell my dad you said thank you. I was telling him about you and how I tried to help you out. I'm happy to hear that the grease solved your problem. Easy fix!
Yes you can never get these old TVs perfect and I am fine with that. I love analog tech with all it's imperfections. Good luck with the magnets.
Nice one mate...i quite enjoyed this from start to finish. 👌👍👍
Great guide, had no idea about that small V convergence screw, gonna try messing with that soon.
Dude your my favorite CRT guy! This is gonna help me out so much servicing my fv300 Trinitron.
Fv300s are gorgeous. What's wrong with it?
Great video. Gonna reference this for sure.
"What you gotta do is you gotta get yourself a boomer" hahahaha. I'm 29 and I have worked on crts a bit but I researched quite a bit before I discharged a crt for the first time.
Calibration is a challenge not because of knowing what to look for as far as image problems, but because of not knowing what abbreviated codes in the service menu correspond to each component. There are lots and guides out there, but the menu items vary by TV model.
This is thee best breakdown I have seen so far! Thanks a ton. My 2530 might not need a recap like I previously thought. Fingers crossed.
What problems is it having? I've done some work to my 2030.
That's an old ass picture of Morgan Freeman. Have you seen his old cigarette commercials from the 70s? There super funny.
@@riggel8804 definitely gunna check that commercial out. Lol. And just had awful geometry and rough convergence. Did a pretty solid job calibrating it over the last 2 days though! Only thing is I couldn't find the focus knob.
very cool video. thanks.
thanks for the video, i just got a 29" trinitron (one of the last 4/3 60 hz) so it will be of great help to improve the image which is already great :)
It has 17 000 hours on it, i hope it will last a long time more!
Great video and great work man! This stuff is way too confusing for me though. Hopefully I can find somebody who can help me out with my CRT. Lol 😂 keep up the great work!👍
Go find yourself a boomer. They're used to fixing things.
Without this video I'd be f***ed!!! My KV-32S45 is now squared (mostly) I'm happy with it. Thank you. Liked and subbed.
Thanks man I got a SHARP tv recently due to it being local and just put a rectangle magnet on it to bring from the top middle to the outer left up a tad. The rest is ok but not reddit perfection everyone strives for. Wish I knew this a few months ago I sold a set I could of just used magnets on.
Haha, "Reddit perfection" I am going to use that.... Grid patterns are for collectors.
excellent video, I have had several Sony sets (KV-FS100, FS120, FV300) and I kept the ones that had the best overall geometry. I cannot bring myself to open them though and thankfully I been able to fix the majority of the issues mine had through the service menu.. except for the bowing of course. The larger sets seem to be affected most from what I have noticed.. 24" and below seem to have less issues.
I've heard from several people that you can fix the bowing by pushing the yoke in, rewedging and securing. I would like to try it out.
@@riggel8804 have u tried this yet in a vid mate?? We'd like to see. Be safe!
valeu meu amigo concertei minha tv like
a lot of jvc d-series have bonded yokes. A lot of the Sony Wega CRTs suffer from yoke sag and need them pushed in/readjusted to fix the bowing on the top and bottom middle. The Square Sony Crt monitors with speakers below instead of on the side (KV series etc) seem to be better in this regard.
I haven't tried doing a yoke adjustment on a sony. I figured you didn't need to because they have tilt correction in the menus but a lot of them suffer from bowing at the top and bottom. I will have to give that a try. It makes sens that their yokes can sag. They have way more hardware attached to them than most TVs
youre the fuckin best man, subbed bc of this video! I have almost the exact same model (kv-36sf12) and couldn't find any helpful videos specific to mine. Only difference I could find was the speaker positions, mine are on the bottom instead of the sides. I finally got my screen dialed in after like 12 straight hours of watching yt videos and messing around with the yoke. You even helped me find some pots that i didnt realize were even there lol. TY so much, now I can FINALLY play my games without having my OCD freak out on me
Hell yeah my dude. What games u playin? I'm sitting down for some fire emblem on the snes right now.
Great video. I was able to improve convergence on my 13 and 20 inch trinitrons substantially. Unfortunately there doesnt seem to be an HTrap on the fs100 models.
Thanks for the feedback. Glad I could help
The struggle is real 😂😅, just got a new Wega 29’, i know the result will be worth it 🎉
I finally got the courage to open up and dissassemble my vga monitors. Hope to complete a tube swap sometime this week! Swapping a 17" chungwa with a lg/Phillips tube.
P.s used dielectric grease to bring another Dell E773c vga monitor back to normal working order. The screen would fling when the anode cap would snap.
Cool! tube swap shouldn't be too hard on a 17 inch monitor. Make sure you bring the neck board a convergence rings over with the tube.
@@riggel8804 ever tried to put a pvm/bvm yoke and neck board on a consumer TV? Would be fun too see if one could get perfect geometry that way.
@@SamsungS-or1qf The yoke has to move with tube.
I have never tried a tube swap. When a tube goes bad on a crt I just take it to the dump. The thought of trying a tube swap on one of my 36 inchers fills me with dread.
Thus was great. Ive seen several of your videos, and you say some retty funny shlt. UA-cam sucks at alerting sbout comments, but if you do see this id like to ask a cpl questions
Wut up?
Thanks for this video and the time you put into it. I have a KV-24FV12 with two issues out of the gate: 1. In any OSD and sadly while a GC is connected via composite or S-Video there's a jitter/shake to static text. 2. The image is tilted to the left and I figured menu rotation or service menu TROT (which it has) is not affecting it much to correct, so I believe I may need to physically rotate the yoke correct? I really hope this jitter can be corrected somehow. One thing I have tried as well is VM set to off both in menu and service menu. Thanks.
Doing this i found relying on the grid isnt always the best. I prefer having the grid help, but switching inputs with a switcher and having several difrent consoles i want to play to test it. and just switching back and forth and trying to get the best middle ground. You can't get it perfect for everything. BUT you can get it pretty damn close.
I have a monitor that ticks so I will probably try the dielectric grease first, it also glows up the back but I I've only looked through the grill, hoping that's just a cap issue.
Food luck! Let me know the results after you work on it.
awesome information! Thanks for sharing this. my CRT has a weird horizontal jiggle across the bottom 4th of the screen. Doesnt effect gameplay yet but is very noticeable on still images. just a constant back and forth jitter. what could that be? bad caps?
Bad caps comes to mind. Can you upload a video?
5:22 - I find a mirror works pretty well.
Thanks man, I learned a lot with your video, I probably wil never do it , cause I am sure I will fuck it up, but is nice to learn this corner and green, red or blue stains can be fixed. Man, I own 3 different Widescreen CRT , one of them is PAL and NTSC 480i or 576i and the other 2 are HD with HDMI inputs, I realized the HD ones hade problemsof overscalling, somethis at the side or the top and bottom ( sides is the most common) do you have any video showing how to fix that kinfd of problem? cause I already tried with their service menues, but it seems is just impossible to recover those zones using them.
Hi Riggel, i have been meaning to clean up the bottom right corner of my Zenith Flat CRT and watched how you did it. As long as Im not touching around on anything and just slip the convergence strip under the bottom left of the yoke (to correspond to the bottom right screen corner) theres no hazard or risk right? Rather than shoving a convergence strip under the yoke’s corner, could i just get a larger circular neodymium and tape it further away from that corner directly on the back of the tube?
Anything metal will give you a little zap while it's powered on. It doesn't hurt too bad. If you pull the anode cap off while it's powered on and stick it on your tongue it will ruin your day so try not to do that.
Regarding the magnets, both of the techniques you mentioned can work. You really just need to get in there and play around. You will figure it out. Good luck!
Anything to adjust the over all width of the screen? Is it possible to globally zoom in and then adjust vertical size
Great video. I have a Panasonic 29inch and am having problems with the focus on the corners, do you have any tip to fix it or improve it?. Thank you. Greetings from Argentina
Did you try adjusting the focus nob on the flyback? There also might be some pots on the neck board that will affect the corners. I am not familiar with that tv. Good luck.
Warning. When you correct corner focus it will often distort the focus in the middle of the screen. Sometimes it's best to live with the corner focus being off.
I have almost the same exact geometry issue on my KV-36FS16 (which I’m pretty sure is the same chassis as yours), with just a little more overscan. Did you ever get it closer? If you did, what did you do?
check this out
ua-cam.com/video/otwPa-nhcTg/v-deo.html
Put the tv in front of a mirror so you can see it while tuning [and give dad a (beer) break.]
Great information...I didn't know how to save settings in the service menu...I just turned the tv off and back on. Also the 0 plus enter to bring the settings back to default will help me alot. I might even try to do some magnet adjustments to my 36 inch garage Trinitron that I use as my test tv. I tried to use the 240p test suit for color calibration but I always go back to super Mario word and it looks wrong. I find the title screen of that game is great for calibrating geometry and color....it has everything you need. I'm lucky my main fv300 has great geometry as there is no way I'm moving that fucker again to open up the back!
Lucky dog. My fv 300 had terrible geometry and I had to dump it. I like the 300s, the one I had was really sharp. Oh well. Plenty of fish in the sea.
Do you have any RGB scart modded TVs?
@@joshforsyth5710 Nope. Don't really see the point when you can get an rgb to comp transcoder.
@@joshforsyth5710 If you're also like me and prefer the older KV models (came in black, looks gorgeous) go for it.
Familiar with Sanyo flat crts? I'm trying to fix an issue, but can't find a guide to the service menu. I got into it, but have no idea how to navigate it.
Great tutorial, I have a tilted screen and I thought that the only way to fix it was opening it up.
Another question, I have a modded PSX and whenever I put a PAL game the image appears on colour (not b&w like most issues) but scrolling down at a really fast speed. Is there a way to fix that via service menu?
Should be able to fix that. Most tvs have an adjustment called "v hold" older sets usually have a nob on the outside for adjustment. Some tvs have the setting in the service menu.
@@riggel8804 I remember the knob from old tv sets, Sadly I haven't found "v hold" or anything like it in the menu nor the service one
Any tips on how to fix blooming? My CRT grows & warps a bit each time bright white stuff is on screen. I know it's normal to a point but it seems really extreme on my model. I have a Trinitron KV-20S10.
How old is your tv? can you make a video and post it?
@@riggel8804 might not be able to get a video any time soon but it’s from August 1994, picked it up off the street for free so I’m assuming it wasn’t treated perfectly lol. The main problem is it bows a bit on the left & right depending on how bright that part is. That & the typical screen growing & shrinking from the blooming or whatev it’s called.
@@Nobutehuhh hard to say without looking at it. My best guess is that something is wrong with the voltage regulation circuit,possibly even the flyback. You could open it up and see if any of the caps around the voltage regulation circuit are bad or just replace all of them. If that doesn't work you could replace the flyback.
@@riggel8804 Thanks! Been looking around online & that seems to be the common answer, I’m really just scared of getting shocked at this point though lol. I’ll check out all the safety precautions & try it myself.
@@Nobutehuhh Sometimes you have to sacrifice a few brain cells at the CRT alter to satisfy the Gods of Analog.
On my Panasonic 30” CRT HDTV CT-30WX54 i have just the top middle raised a bit but everything else is fine. Would a small magnet strip work?
Yeah. I have a link to send you but youtube would fukin delete my comment if i sent a link so look for a video with this title.
Sony Flat Trinitron RGB Geometry, Convergence, Bowing fix
Basically you have to adjust the rings behind the convergence rings. If your problem is what I think it is. Good luck. Let me know if you fix it.
The guy that had my tv before me must have known what hes doing because mine isnt nearly as bad as this one.
sometimes you get lucky
👾let’s get this grid goin’👾
Did you see dad? He helped me in this vid.
26:00
“Plug that sucker in, throw it in the bathtub, and let’s get to work!”- Old Fuzzy.
👾
What grid do you use how to?
Hi I have a 14 inch ALBA TVD3406, the picture is too much to the left, it does not have a vertical focus when opened. Any suggestions...
I have a Samsung Tantus 34" crt HDTV and for some reason it just stoped working.. I plug it to the wall and nothing happens not even the stand by led.. I been wondering if I can solve the problem myself but im kind of scared of doing something wrong hahah.
I think Im gonna give it a try soon. I love the image quality that CRT has
My first thought is that the power supply failed. You can try finding a CRT with a similar power supply and swapping it out. It's not a hard fix if you can find the right power supply but it might not be the power supply.
@@riggel8804 yeah.. it was the H.O.T blown.. it´s fixed now. thanks.. i recently saved samsung slim. it has the vertical IC burnt and the capacitor before it lost capacitance I guess it was the responsable. it´s fixed now but daaaaaamm convergence and alignment is a total mess
@@shiroumxm2052 convergence and geometry can be fun to fix. Good luck
@@riggel8804 jejeje, I gave up for the moment..it´s way harder than actually fix the thing.. if you ever find the settings for the Samsung Slim cl29z30pq deflection and give them to me i will pray for you the rest of my life.
I was planning to give it away to someone who plays retro since I already have a D series for nes and snes and a tantus for 360 and game cube .. if i cant fix geometry im goingo to dismantel it and make a good use of the flyback and othe nice components.. its not a good tv anyway .
Thanks!!!
Yes my english sucks
Bro....I got a 13" zenith sms1324s that keeps blowing fuses soon as I power it on! It's probably an easy fix I'm asking for ideas on what it might be?
Fuses are designed to blow if something is wrong. Do not use the tv until the problem is addressed. You can open it and look for any obvious problems like leaking caps. If you can't fix it take it to a tech. A lot of guys that fix hifi stereo equipment can also service CRTs.
38:07 Classic😂😂😂
I have a sony fv310 with some bowing white lines. Is this fixable with magnets? Im desperate to fix this!
Upload a video and I will take a look
"You got to get yourself a boomer" 🤣
That's was very informative, thanks. I have a doubt, can the anode wire shock you? I have a 20 inch and it doesn't have that much space to work around it when adjusting the strips and magnets.
The wire is insulated and should not shock you. However I try not to touch it. There is a very high voltage going through it. I do bump it sometimes. I've worked on 20 inchers before and they are generally easier. However they can be tight and every time I've been shocked it was on a 20 inch. Get someone to help so you can look at the screen while they adjust if it's a tight spot. Don't hesitate to get creative. I used a 2x4 piece of wood to push on a yoke once while it was energized because I kept zapping myself when I tried to push it with my hand.
@@riggel8804 Thanks, funnily enough I adjusted the yoke on mine before and it didn't shock me, I was just suspicious of working around the anode wire because of the HV.
@Ken Mason I'm sorry, english is not my first language, but when you say lead you mean the connector or the extremity of the wire, right? Just to be clear, I meant the insulated part of the cable, do you think there is enough high voltage to arc on a cable with the insulation in good condition?
@Ken MasonWhat about liquid insulation tape? I have noticed that there are small sparks coming from the anode cable, and I would like a easier fix other than removing and replacing the cable. So, I was thinking about using liquid insulation tape.
You know Even tho links don't last forever, you can go on internet wayback only sucks sometimes cause pictures will be missing
I've never tried that. Thanks for the tip.
Help please!!! Sony WEGA kv29fq60k.
Can't fugure out service menu!!! Really need help!!! Display, 5, vol+, tv on won't fits. ((
Some times it takes a couple tries. You have to power it on, power it off, then press the button combination, then power it on. Check the link in the description for more info. Your Tv sounds like it is not a USA TV. It might utilize a different service menu.
@@riggel8804 tv was bought in Europe. I tried all kinds in last two weeks. I can't fugure out what is wrong.
What kind of magnets are you using? Can any magnet be used?
I talk about magnets around 1minute into the video. Rectangle ceramic home depot cheap magnets are my favorite
I picked up a nice 20inch fv300 yesterday and was super excited. hooked it up to my pc and it looks just terrible...seems like colors are missing or something...like burnt out...i dont know how to explain it...i tried to adust the colors in the service menu but nothing can be done...i might have to trash it. Is there anything that i can do to get the colors looking right? It looks like the tv was left on for too long or something.
Upload a video of it to your channel and i will take a look.
@@riggel8804 ok..i will..thanks.
I tried another adapter. It fixed the color issue...the other adapter was the problem. But I see some blown out colors in the corners. I will post a video after I try to fix the geometry and color in the service menu...I fucked it all up trying to fix the other issues lol.
@@joshforsyth5710 cool.yeah you have to troubleshoot everything in the chain. Color issues in corners could be convergence or purity.
I have been trying to search for a way to get into a Zenith c27f33 service menu for a while now and cant seem to find any luck. Any idea?
Sorry man. No idea.
Yo, my sony crt KV 34FS110 has *warped* on top side corners, only this problem. Can i fix this in the service menu? Thx alot.
need 2 b watching the video my dude
I see a lot of concern in the comments. If it helps, I'm only a teenager and had 0 shocks inside a TV. Just go for it and follow the common precautions.
Hey I know this is an older video, but can you tell me which setting in the service I need to change in order to fix the brightness banding on an XBR 250? I can't seem to find the solution anywhere online.
I saw a post for this on the shmup forums. I can find it for you if you still need help
@@riggel8804 Yeah thanks that would be great.
@@StormShad0w313 this is what i found
XBR250 COLOR BANDING PROBLEM
If you have a XBR250 and you're experiencing horizontal blue, green or red banding across the screen with a component video connection, you will need to enter service mode and adjust the HOSC parameter. Initially HOSC is set to 7 (factory default), you'll need to change it to about 11 - this will eliminate the color banding in the picture.
@@riggel8804 Thanks a lot for the info, i'll mess around with that setting tomorrow. Really digging your channel so far.
@@StormShad0w313 Thanks! Let me know how it goes.
Where do you get this from
what strength magnets would you recommend for correcting purity issues?
ceramic rectangle magnets from the hardware store. Similar in strength to fridge magnets.
@@riggel8804 thanks dude
@@anthonysarkissian6581 ye
Ps3 ok through component to run test suite??
Should be fine. Not sure how you are going to get the test suite on there. I have no experience with the ps3. There is 240p test suite for the ps1.
i cant acces service menu on my tv :(
How did you say it is to go back to defaults? I still don't understand English very well
Aw man i forget. I check it out and get back to you tomorrow.
@@riggel8804 ok, thanks
@@mauriDJ23 press zero and then press enter
Cool video but your geometry is still pretty messed up at the end. I wonder if it's even possible to fix it on these flat screens. Mine is pretty bad too.
The geometry on this tv is fine for my taste. If you want perfect geometry on a grid pattern than you want something other than a flatscreen Sony. I recommend a small pro monitor. Many of those have perfect geometry.
There are some other techniques to correct geometry that I didn't attempt in this video but I don't think it's worth trying to make Flatscreen Sonys perfect.
The bigger and the flatter a picture tube, the harder it is to get perfect geometry and convergence.
As someone with a large flat-screen crt that was serviced by a professional (old guy in the neighborhood who used to work in the trade), its pretty much impossible to get perfect geometry. The technology is still made to be projected on a curved bulb at about 20", not on a flat screen at 30+", so nearly any fix for warping or bending you implement will cause a problem somewhere else on the screen.
That said, it certainly is possible to get it good enough to where you don't notice any issues in-game, which is the ultimate goal. As a hobbyist, it can be very rewarding to meticulously correct the errors on a CRT using the 240p test suite. But ultimately, if the goal is to play games, the issues on the grid will hardly surface in actual play.
Great video, thanks a lot. Gotta go find a boomer…
40:24
What console are you using the test suite on?
I think it's the snes through my ps2 emulator.
@@riggel8804 Can you use it to calibrate 480i geometry and conversion for PS2?
@@dreamingdragon6913 kinda. The snes only outputs 240p so all of your calibrations will be in 240p but yea it will help you calibrate geometry and convergence. 240p is the same as 480i in this context.
Alright Thanks.
@@dreamingdragon6913 ye
I guess for worse CRTs you can’t do anything like it? I have an old ass zenith and all I rlly want to do is adjust the brightness but it has no brightness settings
Adjust the knob on the flyback
i thought real convergence strips used mumetal and weren't magnetized at atll.
What is mumetal? Is that metal made from the blood of a legendary Pokémon?
@@riggel8804 i dont get it
Don't use magnets for convergence strips.
fairy dust works better
25:34 is this satire?
You lost me with the generational bs. 😑