Unlike most of your patients, this one should have no trouble selling. Vintage computing is right in the nostalgia sweet spot - grownups with money wanting to recreate their childhood.
The UK Amstrad CPC 464 Computer had a very similar Green Screen monitor in the mid 80's, they were pretty good tbh, there was also an option for a colour monitor, they were all built by orion
As Shango said, Japanese transistors that the part numbers start with an A,B,C or D you add the 2S pre the A,B,C,or D. As well, the A and B (2SA, 2SB) are PNP junction and C and D (2SC, 2SD) are NPN junction transistors
I like how you can see the burst because the monitor doesn't have any filtering for it. It makes it look like a newspaper halftone. That thing is pretty sharp, and probably designed to show 80 column text which would be crap on a regular TV or monitor.
I remember years ago seeing text on a Green Phosphor and it was very sharp, I guess no convergence issues being no shadow mask hey. I did like Amber coloured ones as well or would that be called Orange perhaps hehhe.
Well hot damn, Shango. I need to thank you for hauling a memory I had no idea still existed out of the basement. This is the exact monitor that accompanied my dad’s Osborne 1 work computer. Until now I’ve remembered it as a no-name generic green monitor and would never have been able to ID the brand or model. Thought that information was lost (if I ever knew). But something about seeing the NEC logo nestled up there in the right context made a whole lot of synapses fire right up. Brains are *crazy*. I also now remember never being able to figure out why it said Character Display. That never made sense to me except giving the vague impression that maybe Inspector Gadget or Bugs Bunny, being characters, might somehow be available to me on it. We played LOTS of Space Invaders and an unknown dungeon crawler on this monitor and my mum wrote church newsletters on it, battling the word processor valiantly every time it made some inexplicable formatting change. And I won’t forget the day I noticed the similarity between the RCA on the monitor and the one saying Video Out on our VCR, next minute I was watching GREEN TV ON A COMPUTER (at least that’s what it seemed like to me). Hope everybody has enjoyed my rambling waft down memory lane as much as I have lol Great vid, thanks again👍
And NEC is a really good quality brand; I don't know about now, but they certainly did not cut corners, and they did go out of their way to make stuff easy to fix.
Great video Shango we knew you would figure it out. Of all the videos you have created I think this one is the quietest one yet. No firecrackers, no handguns, no loud exhaust, and no blamulance.... Thanks again for the video
These screens had lightning fast respons times, typically an lcd has 5-12ms response these crt monitors were 0.02ms, making them perfect for playing games. i had one years ago but it had an orange screen not green.
@@Synthematix Thought it was amber. Anyway about 2 years ago I got a used II+ and accidentally broke the screen on it. But I was unable to find a NEC one. That is when I saw the different types of NEC screens from the time. Like they have a color one. Looks the same with three knobs.
I used a similar monitor with a IR and B&W CCD camera on a telescope. The green is less hurtful on the eyes in the dark. Worked really well that way. They made them well and most failed more on smoldering of the linear transistor. Often a BD190. Repared a tone of them.
Green is the center frequency of the visible light spectrum of 'most' and dwelling animals - that includes the Human animal - the frequency is 555 Milli-Microns { Most people have no idea what the word Animal actually means - because they failed to study and learn Latin } This is why most of everything in nature is GREEN - Grass- Trees - various foliage - and why one must eat Green fruit and vegetables - As your mother said - "" make sure you eat the greens "" Debt instruments - passed off as money are also often referred to as 'Greens" Remember the "" Greenback "" and the Reich-Mark were also Green. ▶ n the summertime ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-hw-pwT4vr_w.html When all the trees and leaves are green And the redbird sings, I'll be blue 'Cause you don't want my love Some other time That's what you say when I want you Then you laugh at me and make me cry 'Cause you don't want my love Roger Miller (January 2, 1936 - October 25, 1992) Album: The Return of Roger Miller www.azlyrics.com/r/rogermiller.html ▶ Roger Miller - Medley Of Songs (Live) ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-gw1B2VwLFG8.html
Shango066's fashion critique watching QVC on a green 1981 computer monitor is the best part of this whole video. Hey, man, let's take the Fairmont out for a spin. I am so totally into that. :) I'd come to LA just to mess with people and do that. Could you dress up like my chauffeur and take me to the finest places in LA? Take me there, get out of the car for me, and open the back door for me, then wait in the car with the other limo drivers as I down a few very expensive pints of beer. In all the tabloids: "New eccentric millionaire arrives on LA scene - in a chauffeur-driven 1980 Ford Fairmont". Bwhahahah. (The real me is the guy who will crawl around on the ground under your car and help you change the transmission.) I used to work in a TV station. We had Quad machines. I loved those things. We had Ampex and RCA machines at my station. They required a lot of care and feeding to keep them happy, but WOW.... they were amazing. And keep your hands away from the reels during fast forward or rewind; I think modern safety rules would require a guard cover to keep you from doing something stupid like putting your hands into fast-spinning reels of tape which had a lot of mass and therefore momentum and could easily break bones.
You were rocking with your Commodore 64 or Atari 400 back in the day if you had one of these! 😄 You gave an excellent tutorial on how to repair without a schematic. BUT, boys and girls, you cannot be successful at electronics troubleshooting without at least a good working knowledge of Ohms Law. Shango has that in spades!
Turns out the constant implied message that you don’t need to bother existing unless you look like one particular small fraction of the population was bumming people out. Snowflakes.
I bought a salvage TRS-80 in 1984, dropped, CRT shattered. I went first class and ordered an amber-phosphor replacement. People used to diss the white phosphor tube in that machine. IBM, after all, was green. Still have a little NEC monochrome amber PC monitor, too, complete with a VisiCalc image burned into the phosphor.
What a lovely old piece of technology where the Horizontal Hold Control is moving the Horizontal Oscillator Coil's core in and out on a screw thread. Well done for getting it going again Sir!
Back in the day I had a bunch of NEC color monitors, they were really good. The only reason I replaced them was because of their size, when flatscreens became available .
You made a mistake, at least if they were decent NECs. The NEC 17" multisync monitors with trinitron CRT were the bomb. Absolutely outstanding monitors.
There's a monitor very similar to this one (white phosphor) that shows up briefly in a library scene in the movie Wargames. I much prefer the green (or white) phosphors over the amber ones.
I have one of these with a very tired tube, its a lovely little screen. Now are you are getting more into my area with the computing stuff, I mostly work on computing stuff from the late 70s to 92 or so. Was very pleased to see this video!
Back in '83 my buddy and I shared a first computer and the upgrade we went for was a green monochrome monitor similar to this one. Those days never come back.
@11:06 - I have built one or two of these kits. It's great for soldering practice. Managing to flash a firmware is a monumental accomplishment though. On my era kits, the USB port does nothing.
It was me who recommended shango to buy one, there are a lot of fakes, unfortunately shangos is a fake, the real ones are actually pretty decent, on the real ones the usb port connects to a pc
I used to love the old green monitors. Had a C=128 in the early days, the monitor I got for it had an 80 column green screen and color for the C=64 mode. It worked very well for programing, I wrote and sold several BASC programs for the unit as many of the businesses in our town run their accounting with the Commodore because of it's lower cost and ease of programing. One of my programs handled all the charge accounts for a local hardware store. It was one of my best attempts to make a game machine do business work, the owner of the store loved the program and used it for years before going to an expensive IBM system and very costly software. Progress I guess.
These monochrome composite monitors are mostly made for high bandwidth chroma-free signals. If you've got an s-video signal, connect a luma signal to it and it'll be a hell of a lot sharper. Try the bandwidth test from one of your test pattern generators, I'll bet it'll manage distinguishable lines all the way to the end.
Thanks for reminding us to check those NTE pinouts by testing, not just what is on the package. I recently had two transistors with the same NTE number and package printed pinouts which were different, so one did not match the diagram on the package. Quick test to be sure. Thanks
Instead of connecting to your digital receivers composite out, try the luma out, that way you get a sharper picture without all the colour info mucking up your pic.
You sure did a good job finding that bad transistor. Well done. I would like to have seen you adjust the vertical size. I have a 1980s IBM monochrome monitor, and as it got older the vertical size got smaller and smaller, and adjusting it didn't work. I took off the cover and looked for visibly leaking electrolytics, which is about the extent of my expertise, and found two. I replaced them and voila, problem fixed.
I was almost sold on the honey, but then they brought out the wine bag and I thought that would just go so well with the indigo skinny jeans especially in contrast to the green background. I cant wait to hit the club with my new wine dooney passcode bag and indigo skinny jeans. I'll be bangin
It's interesting that this monitor can decode an NTSC signal, especially when it was originally intended to display input from an early character-mode computer. PC DOS characters would look pretty sharp on that monitor.
Early PCs had composite outputs, MDA, CGA and EGA cards had them. I guess composite video is good enough for a monochrome display, you only need RGB if you want to display colors correctly.
This thing, and basically any other computer monitor from the era which had RCA input jacks, is basically just a very high quality TV set with no tuner or IF strip. The computer put out composite video which would comfortably go into the Video IN RCA jack on a modern TV. They were different from a regular TV set in that they had really good high frequency performance in their video amplifier and driver circuits - to prevent smearing of the letters, especially in 80 column mode - and often lacked chroma filters for the same reason (with the effect that you can see color signals as pixelated; I could see that in the video). The phosphors in the CRT could be green or amber or white; all to reduce eyestrain for a given application. Also, they were designed to run all day, every day, so the CRTs had great cathodes. They were meant to run all day, every day, in an office, possibly with employees forgetting to turn them off at night. Apple-branded monitors with composite input are awesome. Some had an anti-glare black (fabric?) screen in front of the CRT. Leave it on, even if it's not perfect. You will thank me. Zenith Data Systems, awesome. Wyze, awesome. Mitsubishi/Electrohome made some beautiful color composite monitors; they had a finer dot pitch than a TV CRT. They had a "chroma decoder" box as a backpack which had Color and Tint controls; the backpack hung off the vent slots on the back of the monitor. They were truly great. You're likely to find those with Apple II computers, in my experience. They are full NTSC RGB when you take off the "backpack" and work great with Amigas if you know your TTL logic and can throw together a sync inverter... and file a DB25 connector into the much rarer Amiga DB23 connector. Save the backpack, leave it on the monitor, we're all about preserving vintage electronics here. Also, Panasonic/Matsushita/Texas Instruments, you can also find these with security company brand names. 10" color, gorgeous build quality, maybe about the best picture NTSC could ever deliver. If you see a TI-99/4A Home Computer Color Monitor - or with any other brand name on it - you grab it, save it, and restore it. They are simply spectacular and they are built to last.
Interesting video! Dead 2sc1318 has been a common fault on my equipments lately... Got to the point that if I find a dead one, I just replace them all... Learned my lesson on a Kenwood receiver that drove me nuts. hehehe
These are nice for text display, back in early 90s we used to have makeshift dual-screen setups on IBMs with VGA+MDA. Got one of those chinoscopes too, surprisingly usable just needs rotary controls.
Hi Shango, I don't really see you replying to comments, but I do hope you read them. This is exactly the type of video I keep hoping you do more of, but in a much slower and deep dived fashion. As you were troubleshooting this, I would love to see you deep driving more in your own words of how you expect this circuit to work with some examples from prior experiences. Even if it means you bring out a whiteboard with a marker. This type of monitor videos are my favorite cause it takes out the UHF circuitry and focuses on the basics of a CRTs.
Yeah, I would also suggest to source an 80 coloumn CGA color monitor with an in-line tube, and transplant the tube into a 14" TV. It will look amazing with the high resolution tube! Not really worth it financially though, as a 14" CRT TV worth next to nothing, while a good hi-res CGA monitor might worth $200, maybe even more... But if one can find one with a bad, unobtainable flyback, but still good CRT... Unfortunately that is a rare find, because if it has a bad flyback, it means even if the tube is not weak, it would probably have screen burn.
I think I saw this exact model NEC in the movie "WarGames". It was in the scene where David is in the library trying to get information about Dr. Falken. *Update*: "Yep, confirmed. I just rewatched that scene and it is that same model."
I used to own one of those, I modified it to run from 12V so I could use my Atari 2600 when I parents borrowed my Uncle's RV and we toured round Scotland. Great Little monitors :) Also featured o the movie War Games :)
Thankfully, no transdermal sexual side effects were co-twerkulated in the making of this video. I was laughing my ass off! Dude, your troubleshooting instincts are top notch.
The picture is so sharp you can see the chroma sub carrier dot crawl, a sharp 3.57Mhz filter would make it look really nice. An old PC with an MDA output would look good, but as I remember these were TTL not 1V, maybe there is a switch ?
I love this channel! Thanks (Garfield) for making it informative and hilarious. I watched it full screen now my white background looks pink. That green damaged my eyes or brain.
NEC was the company that made the TurboGrafx 16, the first 16-bit video game console before the Sega Genesis came along. It was first released in Japan by Hudson Soft as the PC Engine before it came the US as the TurboGrafx 16.
Love the CRT green screens, I have an old Amstrad CPC 464 home computer with green screen monitor, have not tried to see if it works and several other monitors which one is used with an outside surveillance camera. Getting hard to find and totally cool!
Nice fix especially without a schematic. Sadly NEC sold computers in the 90s under the name Packard Bell at places like Sam's Club. They were surprisingly crappy for being Japanese.
Packard Bell is one of those really old school brands, that's been sold by many different companies over the decades. Last time I saw Packard Bell it was actually an Acer product.
Whoa! I had NO IDEA it was possible to run a converter and run regular TV through an old school green monochrome computer monitor designed for text only! This is HUGE! This opens up a ton of projects for me to have fun with, on a pile of old equipment I have! Can someone please tell me what converter is used here?
@@SteveHacker The Zenith DTT-900 (no analog passthrough) or DTT-901 (analog passthrough) were some of the better DTV converter boxes sold. eBay's probably as good a way as any to get one, although they do pop up in thrift stores from time to time. There are brand new anonymous Chinese DTV converter boxes available, though I don't know how many still have a composite video output.
Probably went with an Apple II or IIe computer. The Apple II series outputted composite. Most of the IBM PC era outputted Hercules, CGA, EGA, VGA, or SVGA out depending on the era.
Chambray is a beautiful medium blue - though even on a modern flat-screen led it's exact hue will differ depending on how the temp/saturation etc is set.
You did not buy one? get one while you can. Where is the crape erase commercials? Remember it is sleek. Great short weekend delight video. I wait for Saturdays for your videos. Or watch past ones. You're one of the best of the best. Can't wait for the next videos. Now I can fix my hair loss thanks to you no side effects trans-dermal Wow! Only $49.99 not $50 great job without schematic using your trans-dermal tools. Gotta to go and buy my shopping urge. Chambray is my color.
Hey man, I find your videos to be very educational, I really think that for all television videos, you need to start using this channel for your demonstrations, not only are your videos super educational, but the videos are hilarious!
The picture is great - Brightness and contrast levels are as expected - Focus is 'spot on' It does not appear to be blooming This monitor has had very little use - and the transistor likely failed during the time when the monitor was stored, refusing to operate when taken out of storage and then abandoned. These particular transistors during that era were manufactured by MITSUBISHI and NEC These problems existed in AU in MITSUBISHI - THORN - AWA -and- NEC TVs and more prevalent in the first three mentioned as they all came out of the same factory on VICTORIA ROAD - RYDALMERE (SYDNEY)
This monitor was sold under several different badges, HP sold them with HP branding for use with the HP-86. I think BMC also sold a version. If you feed the Luma signal from a component or S-Video output into this monitor it will remove the color artifacts and get even sharper. You can also feed it from the Luma outputs from a Commodore 64 or an Atari-400/800
If it wasn't for Shango I would never watch any home shopping television. Some of those ladies are very hot! Great and well thought out exercise in a fautly electronics repair.
