EEVblog

Teardown of a Sony CCD sensor in the 1985 vintage Video 8 CCD-V8AF Camcorder.
And a look inside the small CRT Viewfinder
Part 1: • EEVblog #375 - Sony Vi...
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[@siskokidd]

Having worked with video for 25 odd years now, this is the first time I've seen a CCD sensor, or the internals magnified like that. Neat!

[@martijnreicher]

The little CRT in the viewfinder is cute and at the same time awesome!

[@rlj151]

I think the answer to why there was "gunk" on surface mounts was look what was above it when the unit was fully assembled. the first one you found, had a blue "diode" below the 238-12 that looked like it would be in close and almost touching. So some protection from shorting would be my guess.

[@groverasylum9626]

I love all these tear downs. But, now I wanna watch you put it back together.

[@videolabguy]

238-12 is the luma delay line. Just above it is the R-Y and B-Y bandpass filters. Almost all of the pots are perfectly recognizable to me as a video engineer. All to do with the color extraction and re-encoding. Turn any one of them, and without the test set ups at the factory, good luck ever setting them correctly again! Complex as all git-out of course. Welcome to the land of CCD chips and Bayer color filters. 10:40 - IR filter glass. 20:00 - You got the focus and zoom motors reversed. The iris is servo controlled by a galvanometer movement with feedback.

[@KeithGolon]

That problem with the ring light is because the CCD has wells. And will only reflect when light is coming directly straight down. That's by design so as not to have all sorts of stray reflections happening on the CCD surface. Kinda like car headlights, they won't light up the bottom of a water well. But a handheld flashlight pointed straight down will.

[@JohnDoe-gm5qr]

Those green connectors with the blue wires. I find it neat the way they did that, no wire stripping.

[@frollard]

That cmos sensor is really cool; having the incidental angle of the light is super important to prevent internal reflection/refraction in the lens housing. It's designed to be as absorptive as possible! So neat to see!

[@CatheteriZedEYE]

that was the most inception with cameras ive ever seen

[@666Pulsar666]

That CCD is so awesome. Got to find one for my collection:D

[@garagegeekguy]

That view of the RGGB lines under the microscope was really cool!

[@TheHireTheBetter]

At 16:17 where light is only reflected when going through the 2nd eyepiece, this is due to a heavily polarized coating on the top layer of the die. It lets though only light that is coming in straight-on and in the right polarization, so only that light is reflected off the CCD cells. This is to minimize effects of reflections off the inside of the lens in high-light shots. The reflections would be coming at the CCD at oblique angles where the light coming from the scene would be straight-on.

[@toxanbi]

Double-sided SMD-boards are soldered using glue (to fix SMD parts on a bottom side on its place) and a protective mylar/kapton film (to protect SMD parts during wave soldering by it covering).

[@HntrSvrsn]

I love that anything that's smaller than it should be, is cute including CRT displays

[@Dutch3DMaster]

+EEVblog : Recalling camera class on the subject of old videocamera's and their shading performance, my best guess would be that the MB1 and MB2 trimpots are for setting the Master Black level (the value of absolute black recorded by the sensor, probably somewhere above the blacker-than-black -0.25V video signal in some of the more advanced testcard images). If I'm not mistaking I can recall documentation about some of the Philips/Thomson/GrassValley LDK ENG camera's with CCD sensors, I can recall that setting the white point (after setting the master black level) was sometimes referenced to as Master Black 2 on shading panels (monoknobs). Shading old ENG Camera's (which this is not of course :P) used to take a reading with the lenscap on the lens to set the master black level of that specific sensor/camera head, preferably after they reached their normal operating temperature. It's quite funny to see that the lens and viewfinder construction is almost 100% identical to the Panasonic MS-1 I once owned and pulled apart.

[@mrdummy_nl]

If you want fix CRT viewfinder.... don't worry. There are plenty old camcorders with CRT viewfinder. Enough fun to check it out. They are always B/W until first camcorders with Color viewfinders are on market. The first color viewfinders are very small LCD screens! I owned some with B/W and one with color. First color viewfinders is still poor in resolution compared to much sharper B/W CRT viewfinders.

[@AaronSmart.online]

11:34 could be a date stamp underneath the CCD chip, S62.10.26 = 26th October 1987. I found an example of one of these cameras purchased in 1988 so they may have been in production for a good few years. The claimed "240 lines" would be the typical "TV lines per picture height" analogue measurement of horizontal video resolution, and I suspect it would be more in relation to the resolution of the Video8 recordings than the image sensor. Though if it's a 250k pixel sensor it's not great either way.

[@aeroscience9834]

No no no!! The lens assembly was what I wanted teardowned the most!

[@RobertBardos]

neat optical phenomenon indeed great video Dave!!!

[@stefanBEAR98]

What was that thick lens before the thin lens of the ccd sensor? Looks like a sandwiched, tinted poly-carbonate, with dirt in between the two layers. Can it be cleaned?

[@terrance_huang]

621026 should be 昭和(Shōwa)62(=1987), Oct 26th.

[@michaelmaguire4147]

3:00 that's thermal paste, so one would assume those pins might run hot, and rather than fix it they just put more thermal mass on there.

[@ForViewingOnly]

Would be cool to see the mini-CRT working!

[@pepe6666]

wow thats a really neat effect with the stereo microscope. good on ya for spending some time on it

[@das250250]

Interesting using secondary eyepiece to get a hold of the image, perhaps the diffraction/reflection angle is critical at small distances to highlight the colour filters

[@christatler7378]

I wonder if the gunk on the chip is to keep moisture out from between the pins? We used to do the same thing on some residential thermostats that would start to do crazy things in high humidity conditions due to the small amount of moisture getting between the pins of the chips

[@davepedu5896]

On the very first board - they probably put the mystery gunk there so you don't accidentally cross two pins with a screwdriver trying to adjust the trim pots nearby.

[@sunuk1915]

8 years later c again incredible Sony Engineering introduced DEV🥰💞

[@777giba]

Nice video! I think that silastic is for protection against mechanical and frictional contact with tantalum capacitor from other board (the blue ones).

[@PrimalEdge]

greetings from USA... awesome tear down.

[@marcocruz6859]

Have one of those out of a Panasonic bough on 1997, that I just have been able to trow away hoping that one day I can use it to put it on a RC Plane! How hard is to get it to power up and get video output out of one of this ones???

[@TestTubeBabySpy]

oh wow, so wat that ccd "pixels" based on the trinitron technology?

[@siliconwitch]

How do they wave solder a PCB with SMT components on the bottom? Surely they would fall off in the wave soldering process. If the SMT parts go on afterwards, again the problem that the through hole components would fall out in the reflow oven. Is there some more manual way it would be done?

[@Hernandez9699]

Is there any method to fix a sensor? Or to check if it‘s broken?

[@TheCheesyProductions]

the ccd is probably polarized, so light can only go in and reflect out when the light is perpendicular to the ccd

[@MaxKoschuh]

4:22 looks like a delay line

[@whatevernamegoeshere3644]

exactly my thoughts. We are still talking about crt viewfinders and analogue video stuff, it's probably just a delay line

[@t242p]

You should make a little single channel pocket oscilloscope with the CRT, way better than those poxy DSO scopes.

[@trippplefive]

man, texas instruments' stuff is everywhere.

[@GabrielRotar]

Nice one, any chance you are whiling to part with that lens assembly, it would make a awsome lens for my camera experiments

[@kc8ufv]

One other possibility - you said your overhead lights were LED. What type of LED are they? If they are RGB, you might just be having spikes in the visual spectrum that highlight the filter elements. Yes, it would still go thru the other eyepiece.

[@vaualbus]

On page 141 of the schematic CCD-V8AF-E PART1 there is the schematic of the mini crt

[@peepzorz]

@18;03 looks very interesting, is it possible that the image of an LED die is visible in the eyepiece there? I wonder how it would look with just a plain white or silvered plate as the "subject" under the lens, to better reflect those artifacts.

[@justDIY]

image you view is reflected off a mirror, which is probably xray transparent ... fairly soft xrays probably have a hard time with the glass of the tube itself, at least thats my wager.

[@Jamac666]

You should try and run the CRT. It would make a great clock display!

[@FlowersForYou629]

Why were those old video recorders so sensitive to moisture?

[@gregslab]

Seconded. Seen similar packages explicitly stamped with "DELAY LINE" in old video equipment.

[@tonypino2858]

Cool om te zien groetjes van (Tony pino) uit Nederland

[@knightsun2920]

My idea for the "gunk" could be a form of anti tampering device or voided warranty thing.

[@payamnet]

Time-17:02 The setup you Accidentally put the ccd . and camera and the microscope .. it made the ccd works as a video projector .. if you input video to ccd and from right EYE built a light true input. to reflex the ccd.. the left eye witch you the cam on can actually project the image .. and if you get correct setup with lens you can project the image to white screen this is how video image projectors work.. there is one input light and the image sensor.. mirrors the lights to image pixels... and in completed screen you get 1080x800 or what ever mega pixel full image screen light goes in and mirrors out as Image pixel that's .. so cool... today i was exactly working on video projectors// i wish i could upload for you guys... any comment ? sorry for my broken English//

[@hanssondaniel]

Could the gunk be there to absorb any vibrations?

[@BenjaminGoose]

I think LX/R/B are different channels of a specific colour system that I can't remember the name of.

[@theUBERKron]

I used the lens assembly from just in front of ccd, to collimate a home built laser. Its awesome how overdone old sony electronic goods were. All of my cameras had the "blackout solenoid" fault, where iris opens but quickly closes again.

[@FilmFactry]

I'm learning a lot from you. Thank you!

[@scottb721]

Red and Blue offsets ?

[@williefleete]

the white jobby could be a delay line

[@Shroommduke]

very interesting stuff, this is why I love teardowns. I have to wonder if the CCD has a polarized lens over it causing this effect... ..."weird-ass DIN", is that a standard term? found the viewfinder google - 'sony vf 206 view finder' hdvf20a maint manual.pdf

[@hackmiker]

The same idea popped into my head while watching :D

[@skynetcybernetics9058]

A still from this video has allegedly been used here: en.wikipedia.org/wiki/Charge-coupled_device#Frame_transfer_CCD

[@tgeairn]

Yes, with the uploader claiming it is their "own work". EEVblog (Dave?) What's unfortunate is that the frame grab is inaccurately saying the CCD is in a Bayer pattern (which it is not).

[@davegtar]

Did it occur to you peeps that it was actually him?? :) en.wikipedia.org/w/index.php?limit=50&title=Special%3AContributions&contribs=user&target=Binarysequence&namespace=&tagfilter=&start=&end= en.wikipedia.org/wiki/Special:Contributions/Altzone "Yes, it's me. I had an account called alternatezone but they deleted it. They also would not let me have eevblog. I have often contributed without an account." Dave. The internet can be dangerous place in the wrong hands. Be careful what you post out there :P

[@valdasaa]

Dave what are you putting in those videos :D So catching and interesting, but yet i am always manage to fall asleep in the middle of video :) I always finish watching next day in the morning :D Maybe long hard working day has to do with this :) but i recon if you put some drama in it, and thew explosions, and maybe more action, it would help :) Should be cool to see electronic action thriller movie, staring Dave in movie "That crazy aussie bloke" :D. Anyway as always Thumbs Up! ;)

[@megasmart1337]

Cool , Kind regards from norway

[@hasanalavi4882]

TANKS .every good 🙏🙏

[@cstgwu1]

the ic chip on the borad look up the number on google

[@FrankenPC]

Lux, blue and red offset? ???

[@aerohk]

No CMOS image senor interfacing tutorial?? :(

[@sunuk1915]

CCD

[@sangarp2001]

why no infrared filter?

[@noah3384]

sangarp2001 it's in the lense

[@dariostokan2544]

I enjoy watching this video.

[@Lethaltail]

old 80s electronics love thermal paste and black gunk.

[@EgoShredder]

This board is absolutely trim-endous! :-D

[@rocketman221projects]

These little CRTs don't use anywhere near enough voltage to produce x-rays.

[@Psychlist1972]

I bet the *B pots are Blue and *R pots are Red. Green is then left alone and you just trim the others.

[@ajhiggins1]

Thanks Dave. Any mail to share?

[@robot797]

can i have the vieuw finder please?

[@toddlittleton199]

your having far too much fun with that microscope and light.. Very humorous

[@GiorgioCapocasa]

Beauty!

[@timramich]

That's pretty state of the art for 1985. Japanese innovation.

[@thecobraman]

well hi dave and all i on my videos have one just the same working the video is the big crt all the best from the uk ps big fan

[@timramich]

It would be awesome to have a miniature CRT that does 1080 lines.

[@dtiydr]

Ceramic CCD chip with gold plated pins.. you dont see that these days.

[@tookitogo]

RGGB yes, bayer pattern no.

[@williefleete]

i've hacked an old CRT viewfinder with a mini camera modified to see infrared and made a crude night vision camera

[@samsonofdan]

Dave you're not allowed to say 'mechanism' anymore

[@TromboneGeek1313]

11:48 "Crotch moistening, state-of-the-art technology"

[@maxfactor4209]

i guess those chewing gums are there to protect the contacts (sort of cushion) from other components when 4 layer PCB sandwich together. sorry my english ill

[@maxsnts]

create a diffused led rig to place on the second eye piece :)

[@groverasylum9626]

soooooo if im a real fan i have to sign up to yet another web site? why? my gut says WHY?

[@2legit2quitz]

Apple is one of the few companies that ever stated that all electronic technicians should wear gloves due to small amounts of toxic radiation from PARTICULAR parts

[@lawnside82]

i just found the service manual for that camera. inbox me for a copy!..

[@Berker911]

wonder what happens if u try to make an optical mouse with that :D maybe an Ultra gaming mouse :))

[@x9x9x9x9x9]

Gotta love ADD the best EE's seem to have it

[@RRROBERT1990]

in 85 ussr could only dream about this kind of a technology...

[@sc0tte1-416]

That's an old CCD...how many megapixels would that be? Like .1? lol

[@edherdman9973]

If it's like the CCD-V8 (non-autofocus), 250K pixels, or .25 megapixels :) Sold for roughly $1200 back in the day.

[@FamAngus]

Ed Herdman XD old tech is now old!

[@spencerhunt5621]

Ed Herdman *.25 megapixel.

[@spencerhunt5621]

Essentially, a $10 disposable camera does a better job (by far, so far as pixel resolution) optics aside

[@cstgwu1]

you should make a mini tv out of that crt it do's work i don it

[@38911bytefree]

LOVE THE CRT !!!, MAKE IT WORK DAVE .... NICEEEEE. PUT SOME X-Y PATTERN =)

[@Lchezar]

Times when electronics was serviceable!

[@yarokifor1425]

The first arduino shield ever.

[@peteyabit9488]

built to last

[@lawnside82]

and i have the owners manual too..

[@gregslab]

Whoops. I have now.

[@mashersmasher]

and keep the viewfinder form factor. You'd be like a cyborg!

[@NerdNordic]

Yey!!