Have you adjusted the horizontal freq coil?

if the horizontal freq coil is on the back of the set then yes. Have seen horiz lin and horiz lock. I can get horizontal lock to sorta untear the picture midway adjustment but I would think it would keep untearing and show a picture but picture just gets worse outside either way of halfway point.

The dreaded RCA with the horizontal devil still lurking in it has the big 5.3 K resistor that controls horizontal linearity in the HV cage. It is stepped with additional tabs that add 500 and 1 K ohm if you move the lead coming from the horizontal yoke. I was going to replace it with a variable power resistor but it was perfect, dead on 5.3 K. In fact, I had it out of the chassis to clean out the HV cage and was ready to replace it until I measured it. So, yes I guess having a working HV resistor in the horizontal deflection circuit is rare and we are fortunate. I may change it anyway now as I'm trying to eliminate everything as a possible source of the issue.

If horizontal frequency is different than horizontal lock, horizontal linerity then no i havnt adjusted that one yet....maybe under the set..will have a look. Third adjustment was vert linearity i thought

No, it is horizontal lock

Well, I installed an adjustable 10k ohm resistor and set it to 8.4k I dont know if it made a difference or not. I would think horizontal linearity would shrink sides of picture inwards or outwards and its still super wide off the screen. Also possable this leader lcg 400 test pattern generator now doesnt work but zero experience knowing what Im even looking at.
https://www.videokarma.org/attachmen...9&d=1720050469

Your horizontal frequency is wrong. Can't you adjust the hor. lock and hor. hold and eliminate the horizontal bars?
Adjusting lock one way should increase the number of strips and decrease the other way until they are gone.

messing with horizontal lock and front switch now. Maybe they are just way out of whack. Got focus back, not certain its right but its back after sand resistor replacement of 3k. http://www.videokarma.org/attachment...0&d=1720063868

Ok jurys in on this one. Decided to hook up my leader lcg 400 to my 20 inch crt set cerca 2001.......NO PICTURE! FLipped buttons switches until picture appeared! Hooked it to this tv and we now have laid an egg. I had all the switches off on the generator, I guess luminance has to be on. Now I have to figure out how you shrunk your horizontal image to fit the screen. Maybe it takes a good amount of turns to affect the image for horizontal and vertical linearity. Also wondering since my ION magnet is practically up against the focus coil that the focus coil and the ion magnet are not in the proper adjustment. Especially the focus coil, it doesnt seem to be perpendicular to the neck of the tube.
http://www.videokarma.org/attachment...1&d=1720065341http://www.videokarma.org/attachment...6&d=1720066548

My picture runs off left side of tube.so more fiddling

The focus coil also effects centering. If there isn't additional centering controls on the set the general idea of the he focus coil is adjust for best focus, try to get centering as good as you can and avoid corners getting neck shadow from the focus coil adjustment.

The first thing I would do is adjust the vertical pots to get the vertical linear. If you can achieve that and have sound, then slide the chassis into the cabinet and adjust the sweep (and possibly focus and trap) with the cabinet mask present. The mask will tell you if you have too little or too much deflection, and if you're centered.

Trying to get picture close to being centered. Focus coil, ion magnet. http://www.videokarma.org/attachment...&d=1720102608dth control, horiz linearity. NOt having much luck yet gettting piccture to move to the right.
Messing with this quite a bit getting it to center and shrink. Controls were messed with quite a bit. Width was all the way in and hor. lin. was most of the way out. Im wondering if messing with the power resistors ohms would help me get more adjustment.

Have you adjusted the horizontal drive control? It will affect width and horizontal linearity.

yes I tweaked the drive as well

and what affect did tweaking it make? It's a variable cap and most of the change happens when it is tight clock-wise. The width coil will only change the width maybe 10% from one extreme to the other.

If your set has a double-d mask, the image should extend slightly off screen on either side. You squares look pretty good so I'm thinking your width is just about right.
Looks more like the linearity is off a bit. More compressed on the left and stretched on the right. That is messing up your centering.

Yes, luminance needs to be on. Luminance image info is the brightness as compared to chromanance which is color info.

yeah I havnt figured out what will fix the centering. Maybe check all resistors in the horizontal verticle area. HAVE noticed the drive adjustment and its effect at almost tight ness.

No, that won't do anything. Please answer my questions. I'm trying to help and the more info you can provide the better.

The electron beam comes straight down the center. The only think moving it around is magnetic fields.

It looks like your horizontal linearity is off. Is that correct? Is the image more compressed n the left than the right? If so, you need to fix that before you worry about centering.

Linearity is affected by the damper tube, horizontal output tube, horizontal drive and the linearity coil.

The left side is controlled mostly by the damper circuit and the right by horizontal output circuit.

Once you get that sorted out, you center the image by adjusting the screws on the focus coil.

It was more compressed to the left, wife and daughter noticed it. Ive messed with it a lot. Also not sure which pattern is best for picking out the skewed linearity issues. Set before I took out the chassis. I dont know if it has sound yet I need to hook up the speaker.
http://www.videokarma.org/attachment...0&d=1720132959

Yes, that's a double D so your width is close to correct. Now I'm seeing distortion in the upper left corner. Could be yoke is not all the way forward, or ion trap misadjusted or focus coil misadjusted. My money is on the ion trap magnet.

How does regular programming look on it? That was the criterion for most any service shop back in the day. That slight bit of horz nonlinearity in your last screen shot would likely never be noticed.
The rule for ion trap adjustment is max brightness consistent with no neck shadow.

The thing that interests me is how the upper left corner is pulled in. I think that has to be caused by the positioning of the neck components.

Yes most likely neck parts..I was tweaking those as well. It didnt have this issue before.
Whats also interesting is the more I messed witht all the controls especially the back ones is they cleaned up and the set became more stable when adjusting and also basic operation

Fantastic. Sometimes they need to run a while to work all the quirks out.

I would suggest the upper left may
be affected by a stray magnetic field in the bell area of the CRT. It could be caused by a piece of magnetised metal strapping in that region.

The raster is deflected inward horizontally and vertically at the same time which should exonerate the deflection components.

You might try using a degaussing coil to see if it can remove the magnitism. A permanent magnet placed in the region should counteract the stray magnetic field.

Cloth strapping. There shouldn't be any metal in that area.

I think you may be right. A stray magnetic field. Because I have the focus coil. Quite a bit off from perfectly parallel horizontally and vertical to the neck of the tube just to get the picture centered.

I have reception on the set now because I wanted to see if we had sound. Sound is very faint and distorted. When I bought the tv, it had a 6k6 installed in the 6v6 output tube spot for audio so possable source of crude faint audio even while fine tuning the audio knob.
As far as the neck goes I have the focus coil super tilted sideways horizontally to center picture.
Just plugged a kids game into the audio rca jack on the power supply.....sound gets through and loud using a radio shack 8 ohm speaker so yeah sound in main chassis time.
I have sound, I tweaked the 1st sound I.F. transformer. Sound got a lot louder, not as loud as it should be but better. I dont know if 8 ohms is the proper speaker. Havent tried the original speaker yet. I would like to get a degausing coil. Not sure I have any of the computer monitors anymore that I could rob one from.
Does anyone know the correct ohms for the speaker? Schematic shows nothing, neither does parts list other than "speaker" with part number.

You don't need a degaussing coil. It's distorted because you have the focus coil tilted so much. Fix the horizontal linearity issue and your centering issue will be resolved.

Ok so horizontal lin out of proper appearance is tubes, coil, or somerhing else out of adjustment. Ive seen cathode current of horizpntal output tube adjusted on youtube but not sure that applies here. I should post up a video of what the horizontal drive does when I adjust it. Those 2 coils over the power supply plug I have messed with.

Yes and left side is mostly controlled by the damper circuit. Easiest thing to try is swap out the horizontal output and damper tubes if you have spares.
Adjusting the drive should affect the linearity, width and brightness. The service info outlines how to make all the horizontal adjustments.

6bg6 I have swapped out just because thats the tube that kept on not having the filament light at times. 1b3 I have many of. Dont remember the other tube uness its the 6w4 theres one of those might be more would have to look at schematic agian

Yes, damper is 6W4 and there is only one in the set. There is also a cap on either side of the linearity coil. 0.047 and 0.035 if I remember correctly. You could try tweaking those values.

.035 is now .033 so I could add some value to that. I will have to look for a .047. I do remember .05......yes thats the same cap in the tiny admiral that was suggested to mess with because if I remember correctly the same linearity issues. I have swapped out the 6w4, 6sn7 6al5.
Sound I think works fine now since I have wired up the original speaker. Its ohm value is 3.5 ohms so thas why low sound.

I thought about going larger with the .05 cap gonna try that...something has to move picture to the right

I thought the linearity was okay? Changing the capacitors won't shift the image.
To center the picture these type sets, you have either centering rings on the yoke, potentiometer controls to vary a dc current though the yoke windings or move the focus coil around. I believe this set don't you just adjust the focus coil?

Yes, focus coil and he has it adjusted to such an extreme it is causing distortion in the upper left. It sure looks to me like the image is compress a bit on the left side and stretched on the right. If that was corrected, it would shift the center to the right.

I'd prefer to watch an image that was a bit off center but not distorted like you have it here. The corners of your programming are going to be cropped off anyway.

I'd also try a different signal source if possible. I think you are using a Leader LCG-400? It is entirely possibly that circle is not perfectly centered in the test pattern.

http://www.videokarma.org/attachment...9&d=1720126248

Im still learning how to even recognize what all the picture issues are. More experience I guess. Somebody on the forum points out something on my picture tube image and I hadnt even noticed it. After its pointed out I see it which is good thats why Im still hesitant to put it in the cabinet till all the major oddities are fixed. Leader lcg 400 on 2001 flat screen crt 20 inch tv
yes Im using the leader LCG 400.http://www.videokarma.org/attachment...2&d=1720648259

Changed out .22 capacitor for two paralleled .1 caps to make .2 for original value. This cap goes to the 6bg6 tube. I tried adding caps to the .035 cap which is on the left side of horizontal lin. coil. Made picture shrink horizontally. I didnt want that. So caps on both sides of horiz. lin. coil are .035 and .1 I might mess with the .1. Also there was a 100 ohm resistor that measured 228 ohms. picture is better but i need to tweak it more to the right the whole picture. Focus coil isnt cranked hard horizontally lookin like its all crooked now. I still have it cranked but not near as much.

the picture still has flagging at the top if I use the front controls to center picture. Gotta be something else to tweak. unless that .1 needs checked/ adjusted value. The .035 seemed to shrink picture inwards both sides so maybe try smaller than .1 or slightly bigger we will see. it was fun zapping myself with the test wires of the .035 cap, I wonder how many volts that was. Actually it was the jumper cap I was using. Made daughter jump as she was sitting next to tv on couch playing cards when it made the zap sound.

Also need to find a power cord for it as i do not have one. Searching for admiral tv power cord on evilbay didnt get much