I noticed that the vert hold was analog controlled throuout the mid 80's. Iv'e seen even a very few early 90's sets with vert hold. Sometime in the early 90's Tv's went full hold control automatically. With Sony's I think 1984 or so was it for vertical hold.

My 1991 KV-27EXR25 has no vertical hold. I have never seen it lose vertical sync in all these years. My big RCA roundie will roll once on any source change, and likes to roll now and then when playing VHS.

You should have the schematic tomorrow, unless it came Saturday... I got it out to you on Friday afternoon; sorry for the extra day. Let me know if you need any additional pages... I sent all of the block diagram and all of the schematic, but left out the owners manual and parts list pages this time due to a paper shortage in the house :yuck: . (the manual total is 108 pages). I wish I'd been able to get it out Thursday, as I bet it would be saving you time right now.

Charles

Yours is in the service menu (tagged VFRE)... Very stable as a rule, but I've had to adjust vertical and horizontal hold (HFRE) on those sets a few times.

Chalres

Yup, I learned early in life the "display, 5, vol up, power" lol
Sweet Charles, Ill be looking for it and thanks so much for printing that out for me!

That era Sony (EXR series) had a little "magic button" on the jack panel to enter service mode, rather than the display, 5, vol+, power sequence. They also use the funky remote with AUDIO, VIDEO and GUIDE buttons instead of a single MENU button. I have the 20"...
Any news on the CONV transistor?

Charles sent me a Service manual, as soon as I get it, I will figure out what role the CONV has on HV. Im still under assumption that CONV means Converter on the flyback. And power has to go through the CONV side and PIN before it can get to the HOT.

Anyone chime in that may know?

Actually I'm answering my own dumb question. CONV is the power converter for the appropriate dc side. It's been a while since I stuck my mug inside a Sony. I just was browsing the service manual for my KV-36XBR450 and realized how the conv and hot and pin circuits work in conjunction with eachother. W/o that circuit everything in hv is dead. I found some questionable solder joints on the LOPTX. That alone would take out the CONV transistor. Crappy thing is that the nasty crack in the board goes right thru the LOPTX. So in turn those solder joints flexed and lost a good connection probably when the set warmed up. The E board in this set has obviously had a hard life. Transistors on order.

I'm going to try to find out what my friend did with a CVM-3000 he had, with a lousy CRT in it. If it's still around, maybe I could get it for you for that board. No promises; it's been years.

Charles

Sweet! Thanks for checking into that. It would be awesome to have spare parts for this puppy. I think I got the board straightened out. We will see

Well I got the parts in today, and.. Picture!! Bright raster too, the 820DB22 is really strong in this one!

One issue is some video smearing, got a dark line going down the left of the screen. Looks like a faulty cap in the video output ir IF section..
One other thing I noticed is that even on minimum brightness the picture is still bright like halfway up it seems. G2 is down all the way too.
Here's some pics..

http://i845.photobucket.com/albums/a...6/DSC01711.jpg

http://i845.photobucket.com/albums/a...6/DSC01710.jpg
http://i845.photobucket.com/albums/a...6/DSC01715.jpg
http://i845.photobucket.com/albums/a...6/DSC01716.jpg
http://i845.photobucket.com/albums/a...6/DSC01717.jpg

All right! Congratulations on the fix and the strong CRT!

I had imagined the channel number was via OSD on this one... It doesn't have OSD in addition to the built-in readout, does it? (I guess that would be like wearing a belt and suspenders...) I can't tell if that's LEDs or a vacuum fluorescent display, what is it? (I've seen both on Sonys with green channel number readouts, usually VFDs on the older models and LEDs on the newer ones.)

I suppose you could confirm or rule out the smearing is coming from the IF section by hooking up a DVD player or VCR to the video input. Probably just a bad electrolytic somewhere, the hard part is tracking it down...

rpm1200: The TV actually has both on screen display and a VFD. The onscreen is nothing like you would see from sony, it's not green it's white, ill take a snapshot of the volume control and OSD and post..

On the video smearing issue, I found it both in Video mode and OTA. Here's a better pic of whats going on. I ruled out caps in the Video out X board last night.

http://i845.photobucket.com/albums/a...6/DSC01722.jpg

Bad cap! It's in the supply for the luminance channel which is a flyback-derived supply. A 10uF @ 350v near the FBT comes to mind, or there may be one on the socket board (although I see you checked those). That's great news that the tube seems good!!!!!!!! I've seen too many of those 820DB22s in poor shape. The OSD in that set is the first one which showed not only the channel number, but also the bar graphs for volume, color, tint, etc. Also, the channel display regressively disappears from the bottom up, segment by segment. Kind of cool! Did the schematic come?

Charles

Yeah Charles it did and thanks again! The scroll up channel OSD function stayed the same throught the 80's bu went to green instead of white. The newer models had a display function that would allow the channel to stay on the screen in smaller font. I dig the rainbow bar graph for color. Way cool!

I know what you're talking about with the scrolling up, my Vidimagic has that feature too. Did they put a black border around the white OSD elements? I know the green OSD on newer Sonys does not use a border.

It seems like the first TVs with OSD (e.g. Heathkit, Star system) used white characters and then it became fashionable to use a color like green or yellow... what did the RCA 2000 use?

Right you were Charles! I twas a 350V 4.7mfd on the neck board. When I initally tested it, it showed good on an ESR meter. But I pulled it off the board just to check it anyway, and yep it was leaky. Looks excellent, needs a little convergence on the right and left, but perfect!

rpm1200: Here is the OSD for both channel and picture features, the rainbow is color, hue moves the rainbow from right to left, picture level and brightness show on the same thinner line below. Volume is a green bar.

http://i845.photobucket.com/albums/a...6/DSC01727.jpg
http://i845.photobucket.com/albums/a...6/DSC01726.jpg
http://i845.photobucket.com/albums/a...6/DSC01728.jpg

WOW! That is the BEST Sony tv I've ever seen. Congratulations on a great set and for getting it running!

Thanks Mark! It's a PITA to move though, 510lbs kinda makes you wanna keep in a perminent place. Glad it's got wheels!

Givya a hunnert dollahs fer it. YOU gotta ship though, of course...(grin)

Hehe, thing im goona keep this one around for a while, but if I ever do decide to part with it, you guys will be the first to know!

I got done with the alignment tonight. This set is fairly easy to converge, believe it or not it has a board with 6 pots dedicated to convergence. It's so engineered (overengineered) that it had an access panel in front of the set just under the controls in the door that you remove 4 screws and there are the RGB drive adjustments. Along with these adjustments are switches to turn on and off each drive to the guns. I realigned the yoke positioning, convergence and purity and greyscale. Looks 100 times better then before.
The 30" CRT in 1981/82 must have been the beginning of the giant CRT's. Did Sony produce the forst CRT to be over 25". I think they were producing 27" CRT's before this 30" weren't they?

Anyway thanks for the comments and the help! It always makes a tv repair much more fun when I can share it on VK.

I was hoping to see this thing working again. I love the picture, especially those onscreen control displays.

Sandy, a few years ago didn't someone on Audiokarma say they had one of these in Nashville? If I recall, they weren't too much into video gear. Maybe now that it is an outdated SD set they may want to chuck it.

You got the smear fixed! Glad to help.... I'll still try to look into that CVM-3000, in case I can save it for parts. Now that a couple of the KV-3000s are in the hands of collectors, we need to have parts. If you want, I think I have the original sales receipt from the KV-3000 I bought "brand-new; as-is" in 1986 at Adray's. I might be able to make a color copy of it, if you're interested to have it. It's probably the only retail sales receipt for a KV-3000R to exist, and would be a cool piece of documentation for it. I don't think I have the owners manual anymore, as I probably gave it to the buyer of either that set, or the other one I had & sold.

Charles

I have a Sony rack-mount monitor with the same feature (the pots and cutoff switches are in a little drawer) but it's pretty cool that they put the same feature into a consumer TV. Probably carried over from the CVM-3000...

I think Sony made 26" color CRTs before anyone else had made a color tube that large, but I think they started doing 27"s later, after the 30". The earliest Sony 27"s I've seen were late 80s, and there are both 26" and 27" Sonys listed in my 1986 J&R Music World catalog. If you count monochrome CRTs, DuMont beat everyone to the punch with their 30"!

Yep that DuMont I still gotta see a pic of that badboy sometime!

Charles: I would love a copy of the sales receipt, that would be so cool to have with the set for conversation! I still need to get the RM-706, I only got the W with this set. I found one on the bay for $100. Thinking I should snap it up. I wish it still had the tamo ash veneer sheet in a bag on the back of the set. Thats gone too.

You know whats funny, when I regestered and found AK/VK back in 07, I had a Zenith 19" Chromacolor that I saved from near ill fated doom. It had the same issue the sony did with the luminence dark on the left. That TV is how I found this site.

I'll dig up that receipt, if I do indeed still have it.

On the DuMont Royal Sovereign, PM me next time you're going to be in the LA area, and maybe there will be a chance to see one working :thmbsp: .

I do have a few remotes which are identical to the 706, except no "door" button. I can't remember the number, but they came with the KV-2680R. The RM-705 (came with the Profeel monitors) is physically the same outside, but the slide-out has only ANT A-B and VIDEO SOURCE; no color or other aux buttons. The 706 is so rare that I'd go high on bidding if you do find one on eBay. I' ve never seen another one besides those which came with my KV-3000s.

Charles

Allow me to retort. I retract my previous staement about how easy this set is to set convergence. I have never met a CRT television that was more stubborn to fine tune convergence than this beast! When I adjust Y bow it adjusts vertically, when I adjust the bottom red bow (H HILT) it moves blue. Static ring convergence (horseshoe magnet on the CRT neck) it changes all over again for red VERT STAT... Im sort of a perfectionist unfortunantly, and dont stop until I achieve success. I have been screwing with this set since Friday morning (non stop and it's driving my wife nuts cause she says it looks good). Lol, anyway, as of Sunday...... Scratch that, (Monday) morning at 12:30 am.. I am relieved to say that I am done and the back is now on the set..

Does anyone have any idea what it's like to turn a cenvergence knob w/o being able to see the CRT? I have a blister on my right foot from dragging it over the carpet redundantly.

Anyway, yeah I may be crazy but I guess the results I look for seem to be scrutinous compared to lets say my wife or anyone else that has senn it in person so far. I'm sure some of you guys are the same way as me. Please say yes. Lol

On the convergence; I replaced the CRT in one of mine, by swapping in a better one from a CVM-3000. I left the yoke and neck apparatus in place, so no problem. I can't remember, but aren't the dynamic pots in the black metal cover below the aux controls on the front? I wish I had the alignment & setup manual on that set, but I never ordered it at the time. I do have it for other Sonys of that vintage, but it sounds like you got it set.

On the time being spent obsessed with a hobby item and your wife, I know all about that. Try explaining why you and your wife should get in a truck, and spend 10 days driving 6000 miles round trip, to get a 1200-lb air raid siren to install on your patio... Then spending days installing and wiring it up to the house :scratch2: .

Charles

Thought this was kinda cool. Here is a 1982 airing of the CES show with Kerry Decker, and 5:16 into it you see the KV-3000R with the doors opening and turned on. Theres no sound though.

http://www.youtube.com/watch?v=qZ8qmilo8ic

Lol, yes I totally know what you are talking about. I get the "do you really need that" when I even go to Reno to pick up something, like an extra snowboard when I have a perfectly good Burton at the house.. Recently my wife has been bugging me to take down the aerial antenna on the roof. I like it where it's at including the rotator motor control in the livingroom for aesthetics reasons. lol

I have one
 

I have a Sony Trinitron kv-3000r... I'm in the Saint Louis area of Missouri and I'm trying to find it a home that isn't mine... when I first moved in, I was amazed what a hunk of junk it was, then I grew to love it, it's super awesome and were I in my own home I would keep it, but I don't know how to get it out to a good home. Where did you find yours? I've been itching to toy with this one as one of the doors don't work properly, but have not had the ability to do so, so it's used to play wii, which makes me laugh every time I see my brothers at it, luckily, they can see the quality of the piece and haven't wrecked it.

The Holy Grail. $10,000 bucks. Remember when 15" was a huge Trinitron. Beautiful set, a work of industrial and design art. Awesome details abound with it. Leaves one at a loss for words.

Fabulous set. Good to see it coming back to life!

Hmm, I live in STL, that's kind of tempting if you still have it. But at 500lb even being in my own backyard I just don't know that it's something I could handle.

I'm much more into the portable Sony televisions from the 1980s on up, including the active matrix LCD models and the video walkmans.

[non-affiliated]

Found a KV-3000R on Washington craigslist. Wish I had the space!

> SONY TV IN GORGEOUS BURGUNDY CABINET WITH MATCHING STAND - $200 (Olympia)

> Gorgeous dark burgundy hardwood cabinet with electric door back in the day there were only a few made and the cost was $10,000 perfect condition very heavy.

> Delivery is negotiable. comes with matching DVD stand $200

archive pics:

https://imgur.com/a/kenr2ZT

https://i.imgur.com/34R2eEEl.jpg

https://i.imgur.com/LPcqy6rl.jpg

https://i.imgur.com/xtwePr9l.jpg

https://i.imgur.com/5SYQ4U7l.jpg

https://i.imgur.com/IaokUkkl.jpg

KV3000 KV3000R KV 3000 KV 3000-R burled rosewood mohagany black Japanese Balsa wood tamo ashwood

I've got one sitting here in Wisconsin with the matching VCR cabinet that someone wants to pay me to gut and wire the doors to a switch so he can repurpose it. I don't want to do that, but I do want it out of my way.

.