Panasonic Panavision Commercial Hybrid Color Television Repair Rare VRT TV
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- Опубликовано: 8 апр 2022
- Analysis and repair of vintage tube color Panasonic tv set. Diagnosing convergence issue cleaning controls and overview of the television.
/ shango066 
Развлечения
Wow, this was actually my television set. I bought it in 1975 when I was in college. I marked the date on all my equipment. Note the Dymo label on front. I owned it for over 35 years and
sold it on Ebay about 2010. I bought it new. I think I paid $350.00 for it new which was a lot for a 22 year old young man back then. It had very little time on it over the years. The case was made of wood with a vinyl cover over it.
It was a great set. I wanted to work in Broadcast TV. Back then to get any experience in broadcast television you had to work for a company that would hire you to get experience a studio or editing company. No luck for me to I started to buy TV equipment, video tape machines and cameras. In 1975 there really were not any VCRs, TV cameras or other consumer products at the time. I had a Cartrivision video tape cassette machine at the time and a 3/4 inch Telemation cassette machine. I also had an old Dage black and white tube industrial camera. I learned a lot and ended up working at NBC Burbank Engineering Dept for over 35 years. When I sold it it had some color convergence issues. The pots were bad that adjusted the RGB guns. The CRT should have many years left on it since I only used it for college projects in editing tape over the years. I sold it with a schematic. Hope the owner still has it.
Thanks shano for fixing the set. I never would have found that diode problem. It would come and go. Always thought it was the pot. Thanks again for bringing back great memories of my youth.
thats insane
it must be crazy watching your old set popping up in a shango video
Very cool!
Here’s the story behind Lifetime tubes per a friend of mine who was a Radio Shack manager. The Lifetime tubes were rejects and over runs. Sometime in the early 80s, RS dropped the Lifetime warranty as they were losing money on them and renamed them Long Life tubes. The last batch made in the 90s had a blue etch. They were total garbage as stated and from personal experience. Other brands of garbage from my experience are Lindal, ITT Raytheon from the 60s onwards Channel Master and Sonotone. I stick with RCA, Sylvania,GE, Tung Sol(USA), Westinghouse, CBS, and USA made Raytheon tubes and rarely have a problem.
Raytheon made garbage vacuum tubes? I find that hard to believe as they were, and still are a cornerstone of the Military-industrial complex. And heck! I had no idea that vacuum tubes were still being made and sold even up to the 1990's! I honestly never ever saw any for sale after 1984-6 at the Thrifty drug store that had a vacuum tube testing rig for the customers to use. Vacuum tubes were sold in the photo section.
I used to work for Raytheon Equipment Division located in Waltham, Massachusetts for 11 years. I work next doors to Power Tube Manufacturing that manufactured Tube for Dumont TV as some supports components including PCB and wire wrap board for military and commercial equipment. Raytheon has very high reliable build quality and very reputable equipment for a long time. The problem in America was we have a treason at high level and that why America can no longer work on quality product anymore!
On many occasions, Ratshack was a lifesaver. Not my first choice, but I'm very glad they were around. Back in the day we also had Lafayette Electronics, Olson Electronics, Heathkit and about a dozen mom and pop parts stores. All gone.
Thanks for the memories.
@@chachavessel Allied Electronics in Chicago. Went there as a kid. An electronics wonderland. RS bought it out, shut down in Chicago, moved to Texas (I think) and ruined it.
@@KameraShy this is jogging my memory..McGee from Kansas City. Fair Radio Lima, Ohio. And yes, Allied Radio, which was later acquired by Tandy.
Shango066, the man who has never found anything he couldn't criticize. Love it.
Just watch his zenith stuff, he can't roast them
I think you'll find the sudden current drop during the 'capacitor reforming' was actually the degaussing thermistor warming up. Something to keep in mind when using a series light bulb when testing colour sets.
28:31 I never get tired of that overhead view of the glowing tubes. Those who have never experienced that in person will never know the searing, breathtaking, overwhelming heat that tube TVs give off back there.
Lol I often used to put my old big back TV on as a kid to heat up my room...now I just over clock an play games for same reason
@@foxxy46213 just fire up an old pentium d machine.
@@qwertykeyboard5901 - I still have under my desk and use my early 2000's Dell 8250 with XP, and although it does get uncomfortably hot on the hottest summer days, it is not even close to a tube TV. A tube tv down there and I'd be *roasted* . A tube TV wouldn't comfortably heat a whole room, but if you were within a foot of it, above it and behind it, it could help keep you warm in the winter (think four or five glowing hot coals)
Yes!
Plasma tvs are nice in the winter too
Radio Shack sold lifetime and long life tubes. The long life were more common after the lifetime tubes went away.
I used to buy the lifetime ones and I don't remember ever having one die. They had gold plated pins to make them supposedly get a better long life connection to the sockets. We had a Radio Shack very close to where I lived and they had the tube testor on the wall.
One of my buddies got it when they finally stopped selling tubes directly in the shop.
I was given a really nice suitcase one from a TV shop I used to get the TVs the customers decided not to fix. Another shop gave me a beat Beltron crt rejuvenator later as well and that really helped up the TVs I could get fixed and looking good again.
Those tubes were garbage the pins were sandblasted not gold-coated. Watch my video talk and tubes with Al
@@shango066 agreed
Radio Shack electronics good for the price. never high end
Another one with a plot twist, nice. Not jumping conclusions saves you money and frustration, shango is proving this over and over again.
I recall these slider pots seemed to have a universal point of failure with contacts breaking off the plastic sled, unless the handle broke off first, that is.
I love watching shango watch TV. Reminds me of my grandpa that would comment on everything that happened.
It is truly a beautiful audio/video appliance, and it is equally ironic that the current programming is so vapid and devoid of any redeeming qualities. Beautiful diagnosis and analysis... thank you, as always...
In about 1991, I bought a Realistic "long life" tube that came in a blue box and had the number hand-written on the box. The tube was a dud, right out of the box. I got my money back and never bought another Radio Shack tube. As far as the video connectors on this set, my elementary school had 23" commercial-grade tube-type RCA color sets (CTC39 chassis, IIRC) and they had those types of connectors on them. They were mostly connected to Sony U-Matic tape machines and in about '87, they got a couple of VHS machines. After elementary school, I never saw another U-Matic machine in use at the school and the TVs were newer solid state Zenith sets. The only exception was one of the tube-type RCA's in my high school biology class and the one time I saw it on, it needed major help. I tried to get them to give it to me or sell it to me, but you know how schools are about stuff such as that. Even the tube RCA sets in elementary school were flaky and it usually took some fiddling to get them to look right.
By looking at the old Panasonic insignia, I'd say this set came off the assembly line in 1973-74, just before Matsushita went to the new Panasonic block logo -- right around the time of the first Energy Crisis/Arab Oil Embargo.
It was National brand.
Wow that set still produces some great color !
I used to work on special assignment to do Inventory of Corp. Propaganda department back in 1989. I remember I saw this type of professional set including video camera and tapes set in NTSC/PALAM for 110v 50/60 cycles for activity recording and cable similar to this set. It is very expensive back then . This particular set could cost over than thousands dollars back then that not including camera and recording set that could added up to several thousands dollars back then.
Those slide controls always seemed to be much more problematic than traditional rotary pots. They were very popular for a while and you used to see them on everything. I used to have an old Altec 714 stereo receiver that had them for volume,balance,bass and treble. A couple were touchy even after cleaning.
This is no big surprise: Sliders get the force while sliding in "every" direction(up/down of course, but always sideways and pressing on to the resistance track) and the bottom of the slider is the only "bearing" vs. having a sort of bearing for rotation and the resistance track separated in the rotary ones.
@@deineroehre Slide Control was very popular in old American Automotive made during the 70's. It connected to cable that connected at actuator to close and open Ventilation. The cable needs a constant lubrication with oil and geezer. In electronics the slide control always on Radio and TV equipment that manufactured from Japan and some West Germany brand that manufactured in Japan like Gurndig.
@@deineroehre Yes,I understand that and it doesn’t surprise me either. The issues you mentioned are an inherent drawback of the design. Virtually any vintage piece of equipment I’ve run across with sliders always had problems. What did surprise me was that Altec even used them on their top of the line 725a receiver that cost $700 (in 1970). They were in vogue at the time though (llate 60’s into the 70’s) and aesthetics trumped reliability.
I think the sliders were prone to dirt and crud because the slider couldn't be sealed properly along the length of the pot. Conventional pots were fairly well sealed where the shaft went through the bushing.
Panasonic sure made great products
Thanks for this video shango066 !!
I wonder if Bob Crane used a device like this to view his home movies.....
At the start it looked almost like a toy.
I think the Idea behind the small tube is that you won't see the low resolution as much as the first recorders for home use had a soft low res picture.
Good catch of that diode, intermittent things like that can fool you for a while.
Oh, man, I thought I'd just look in on this. & I'm going on how many mins now? It's been a long time since I've seen the insides of the back of a tv! My dad used to do most of the repair work on our old b&w console tvs from RCA until they went completely solid state. He worked there so he got a discount on all company merch, including all the tubes. I still have 2 1950's models I inherited, one that had picture & the other had sound. 😁
Had to laugh when you were enthusing "It just popped in!". That's one of the deals abt the old tv repairs I recall. Sometimes it worked like wizzardry - like there was no reason at all for sudden responses. My dad would meet a time like that by standing back a step or 2 & just resting his hands on his hips in wonder. I loved it. That's what encouraged me to start messing around w/electronic stuff. 😄
What a neat set... It brings some 80's space management maturity and sturdyness but with quite a lot of tubes.
Love the channel Shango, I come here for your commentary , the repairing is just a bonus! Keep up the good work!
25:39 Shango classic. I love it.
Yeah! Shango is a cool guy tbh, commentary is entertaining
29:02 instant classic
What was interesting was how you placed that diode in the sun and it went open, then freezed it and it changed voltage. Cool tv and how it has a connection for an early VTR machine.
Allways a treat i watch all your videos to the end. Its even better watching them on my CTC117T.
Just saw the thumbnail and have to comment on how good looking that TV is. I gotta go somewhere now, I'll get back to the vid later.
Beautiful set and diagnostics. Have to agree about the diminishing returns statement and a complete recap.....but it'd have to be a labor of love doing it.
Wow what a great set! A lot of unusual features it has. Love the old Panasonic logo. Great video. Thanks!
That logo was originally used for National (hence the big "N" encompassing it), which was Matsushita's main brand in Japan and other markets, but they were unable to use the trademark the US so came up with "Panasonic" instead.
PL-259 was THE defacto broadcast industry composite video connector until the BNC started displacing it in the mid-70's onward. I had piece of 50's RCA TV broadcast gear with it. I have a 15GP22 based Tel-instrument monitor, RCA TM-21, 3 different EIAJ RTR-VTRs and a Sony VO-1600 (the first U-matic deck) with those PL-259 connectors for composite video.
I wish I could find an early 70's Sony or Panasonic color VTR monitor to go with my EIAJ and U-Matic VTRs.
That multi-pin VTR connector fed audio and video in and out between the TV and VTR eliminating the need to connect 4 PL-259 and 1/4" phone jack audio cables between the two. The cables themselves aren't common and are worth a lot of money (apparently they were used on some Star Wars film prop that everyone wants to recreate accurately for themselves).
Fantastic fault finding . You seem to know almost by instinct what the problem is . Love watching you work . Lovely TV . I bet you keep that one . Best wishes from the UK ...
Hello from Greece, i like that vintage beauties are back to life.
Absolute beauty of a set! Wish I had it in my home.
Hi Shango0. That's a cool set. I own a little Panasonic tv set. Still works pretty good. Has always All my very best.
Another cool TV and diagnosis! All my sets were 4.5 to 12 inch and B&W. Seem to get the sharpest picture on those. Bonus is they also worked on a 12V battery.
Esta LIMPIESITA para ser una TV de VALVULAS electrónicas, estas si son ABUELAS TVs pura CALIDAD de la buena, tu si le sabes Jordan buen trabajo GOOD WORK 🙂🙂
Cool little set
Great video. I dabble with TV, I'm a ham radio operator & we just cannot help it. About your old analog system there in USA NTSC. We call it never the same color as compared to our PAL system here in Britain we always thought NTSC color was over the top. I had a multistandard TV & a 1.5-meter dish motorized. That TV was great JVC did PAL, SECAM 4.43 & 5.58 color systems I received NTSC transmissions too on it & I did think the color was over the top,
PAL & SECAM were later improvements on NTSC, which was the first broadcast color standard, but the FCC would never allow the standards to be changed as it would obsolete the millions of TVs that were in the consumer households in that time. ,not to mention all the broadcast equipment costing many millions of $$$ that would need to have to be changed.
I like the look of this Set, it does look New as well.
Nice looking TV!
what a beatiful unit , thank you for sharing another great video :)
Built-in composite input? Truly a "gamers-choice" TV! 😄
That poor old TV... it must live through those terrible shopping television programs from today... I love how reliable that old stuff is - it practically just works - minus one Diode...
😊 nice restoration job dude for that old TV for great thanks I really enjoyed the video🎉
A Wonderfully obscure set.
It's a beautiful set!
Great fix, no one ever suspects the diodes!
That is super super cool. Awesome TV business 👍
Very good overall convergence, but in fairness, small screen CRTs usually converged much better than their big screen brothers. Great diagnostics and fix.
I had one of those sets without the transformer and modifications, Nice littlt set!
didn't try the composite input! thanks for the nice video, was cool to find that bad diode
Ahh the old 8 pin EIAJ VTR connector. I remember having a National (Panasonic) TV in one of my classrooms in primary school here in Australia. It was a later solid state unit, had the same style inputs and outputs on the side of the cabinet including the 8 pin connector. Always thought the PL259 jacks were odd for video. It explains why many of the AV cable and adaptor multi packs back in the day came with PL259 to BNC or RCA connectors. I can't remember if it had 1/4" audio connectors like yours or if it possibly had RCA connectors. It had a pair of inputs and outputs and the 8 pin, and a TV/VTR switch I think.
WOW - That's a beautiful thing!
I am always impressed when you begin the attack in one area, only to find the real spot is a half inch away!
Those VTR video connectors were the standard on all VTR machines and quite a lot of VCR's in the 70's and 80's.
Look at that thing! It's amazing.
Wow! Awesome TV!
Interesting set!
Oh, man, I thought I'd just look in on this. & I'm going on how many mins now? It's been a long time since I've seen the insides of the back of a tv! My dad used to do most of the repair work on our old b&w console tvs from RCA until they went completely solid state. He worked there so he got a discount on all company merch, including all the tubes. I still have 2 1950's models I inherited, one that had picture & the other had sound. 😁
1st class video to watch thank you take care kind regards from me kenneth
Would be cool if the guy that put in the isolation transformer saw this video and got in touch with Shango.Be a good chat for both of them.
Nice TV! Technically totally reminds me of the Hitachi TV I have. This one also has problems with convergence maybe I need to look for these diodes as well.
Gotta comment early and say that is a COOL set!
My Realistic tube experience. I have used many Realistic Lifetime matched pairs in audio equipment repair and restoration back in the day. Some of that equipment is still in use today. With any audio output tube driven hard they are pretty much toast after 5000 hours. When attempting to get replacements for the Lifetime tubes I was given Longlife tubes that were overrated. Ie 7189A (EL84M is close) with 6BQ5/EL84(s) that amp lit up like a Christmas tree! I went round and round with Radioshack they never did replace them with the correct ones. The 6GH8As' were replaced with 6U8s'. Try to get a stable chroma oscillator in an RCA TV with that. The gold clad pins were cool too. Worked great in worn tube sockets although the socket would have to be replaced once a regular tube was to be used.
@Doggie Lindsay
Those RS tube pins were NOT gold plated, instead they had the nickel plating blasted off exposing the copper or brass pins.
Mas que tv linda!Nunca vi um exemplar desse no Brasil.
Enjoyed that as usual, thanks.
Interesting that you still have proper 4:3 broadcasts. We have 4:3 content shown on UK channels but the broadcasters often forget to send the aspect switching signals or worse: pad the sides to fit a 16:9 display, which results in a horrid squashed pillar-boxed image on a 4:3 set .. unless your converter box happens to have a centre-cutout option.
Thats because in DVB HD broadcast, there is no aspect signal to switch to 4:3. You can do it only manually on your box.
@@xsc1000 That's not true. I have a DVB-S receiver pointed at Astra 2 (British TV satellite) and there is an aspect ratio switch signal. My box correctly switches from 4:3 to 16:9 when watching ITV4. They run old 1970s tv shows in 4:3 but switch the channel's ratio to 16:9 for adverts. The dog moves and everything.
@@kyle8952 Its SD or HD broadcast? Because in HD, all is broadcasted in 1920*1080 format. 4:3 format is just put into the centre and remaining space is filled with black, but there is still 1920*1080 format broadcasted, no 1440*1080 (4:3). It looks right on 16:9 HD TV, but there is no information for 4:3 SD TV converter to switch.
@@kyle8952 ITV4 is an SD channel, not HD, so widescreen switching is available.
@@xsc1000 Sorry for late reply. I see your point particularly with the "HD output" mode on common satellite receivers.
It just annoys me that many relatively modern TV sets can switch aspect ratios given the appropriate signals with no need for this padding nonsense.
TL;DR: Or for that matter that stupid 14:9 cropping some broadcasters applied back in the early days of DVB-T but then I'm sure we all enjoy watching "Last of the Summer Wine" with the top and bottom of the image cropped off. (please don't bite I could rant all day about this)
26:35
Showing Chuck Norris just put that TV in perfect calibration and extended its life 5x
Nice score I wish I could find one of these
Leak-O-Matic, love it!
thats a really great looking TV, I love the design aesthetic on the old panasonic TVs and radios, like that one 2" (I think) CRT portable they used to sell, with the magnifying attachment that turned it into a slightly larger lesser quality image. Always wanted to get one and see if it would be possible to mod it for composite.
Design style notwithstanding...
Those old Panasonics are the Travelvison models They have composite inputs. They are in the form of a 1/8" headphone jack. The set came with a cable with RCA jacks to hook up composite. I still have a B&W and color version.
@@Rems61 oh cool I didn't know that, is that the color version that has that? I've only ever seen a BW version and it didn't have a composite in. I guess I'm going to have to start looking for the color version. Is it CT-101 ?
@@JessHull I don't remember if the B&W version does or not, I haven't looked at them in many years. They are both buried in my hoard. But I know that the color one has that jack. At least mine does, I don't know if there are different versions.
26:34 - Chuck Norris doesn't eat honey. He chews on bees.
Of all TV's in all the shango066 videos I have watched so far, this my favourite
It could be used even for retro gaming in my opinion and it isn't that esthetically old
The only problem I see is that the picture tube is a little small, but it has a AV input and output
A tube set with composite video input! That is a rare bird indeed!
That commercial grade Sony and Panasonic stuff from the 70s-80s were beauties of engineering
Very unique tv still beautiful 📺
Nice Job and I have had diodes flake on me too !
Perfect for those ad agency offices to capture the competitors crap...so they can study later on how to outcrap them.
“Baked” make my day …
I remember in the 60's/70's in England and the channels selectors were a wider band (not sure of the right name) in certain weather conditions we were able to hear french television channels.
LOL that TV was a Turd when I had it on my bench in 1983.
It's a super tv, natural colors from vacuum tubes!
大変興味があります！😊修理世界一でしょう。
Shango 066 you have me rolling on the floor with your comments . very funny😃
These sets were often coupled with the Panasonic color EIAJ 1/2" open reel videos tape decks in the 70s, as by the 8 pin connector on the back - we had them in school.
I was going to say that's an EIAJ VTR connector. My early '90s Sony PVM monitor has one too.
PL-259 connectors were used on all broadcast VTRs since they were invented. They were changed to BNC connectors on the 1" machines in the 80s
I have been in the broadcast industry as a video tape operator then later as video tape editor since 1960. Now I restore these 2 " machines
Wow very nice I bet that might be the last one left !
I have the little stand alone Panasonic color tv version of this set. Same tv chassis. My set looks identical if the left hand side with the VTR stuff was cut off, makes a nice color picture. My set originally had no fine tuning, was just gummed up with old grease. My on-off power switch is bad, so it's bypassed.
Thanks!
Panasonic made some great TVs.
Great Work 🙂🇮🇪🍀
Sony made the best TV's back in the day but Panasonic made the best for the money...that all being said the best TV my family bought was a Montgomery Wards 21" color in 1977...it seemed to work forever without ever needing servicing...
Here I was thinking that the VTR would be built in to the TV. I like the design of that set.
Nope the technology of active shielding was not developed until later on, Sony stole the patent from the inventor and they came out with the first VCR monitor combo that did not erase tapes
@@401ksolar My school had a 1/2 inch Sony reel to reel videocorder with a 9 inch B&W TV mounted in the case. You could watch/record from the TV or watch pre recorded video tapes on it.
@@dougbrowning82 yes but as I recall those tapes were loaded on the outside of the case, a new problem arose using cassette that would load inside like a VCR.
I have an NEC v t r three-quarter inch deck from that same era and it appears the remote cable jack is similar, Master Control used to hook to that green Jack on the VTR for a b rolls and edits, we never used Panasonic equipment in the studio, the Eng Crews use Panasonic as they were cheaper.
PL 259 connectors were quite common for CVBS video in the 60s and early 70s. I have an old sony reel to reel VTR which has them. I also think that the very first top loading VHS recorders made by JVC also have PL 259 connectors for CVBS in/out.
Edit: @Free in Jesus was faster than me...
Except in this case, the PL 259 connectors all have BNC adapters attached to them. So BNC must have been more common where this set came from.
you got me laughing at leak o'matic fantastic video thanks
22:35 I think I saw a Horizontal Amplitude adjustment on that board you repaired, that horizontal coil with that white adjuster on it.
Awesome
I love kwerklespringulating the diode; freezing it’s little domed a** just mashes all the TV repair buttons! 😅
JAPAN JAPAN JAPAN IN ELECTRONICS TECHNOLOGY AMAZING
Greetings:
Early in my video career, our facility used many of Panasonitc's triple wide rack mount b&w monitors on editing consoles and singly on each VTR computer control status output. Each and every one had PL-259 to BNC adapters because of BNC ease of use. Not certain, but some early Sony U-matic VERSION may have been similarly equipped.
Without use of a power transformer, how was it possible to safely connect grounded video and audio cables to the HOT chassis? Is that scheme practical for use generally with similar standard video chassis or was it a special conversion just to enable the equipment attachments to avoid the dangers existing?
AFAIK most video monitors have power transformers. There were a few TVs which used optoisolators to connect external video inputs to the hot chassis but this was uncommon. The isolation transformer in this particular Panasonic was clearly a special conversion (done at the factory) of an existing hot chassis television.
You might notice modern TVs have external inputs but don't have a power transformer. The vast majority of these use the flyback transformer for power isolation.
Baaaaaaaaked! great vid as always
I love the round corners and curved sides. The only CRT television I have left is a mid 80s 13” Sony Trimitron. It’s still beautiful but the squared off tube doesn’t give a vintage vibe.
Sony BW TV/ monitors in the 60's and early 70's used PL259 connectors for video in/out.
Yeah. When I was young, dumb and full of stuff, I rigged up a external speaker jack on a hot chassis set. I installed a 1/8" phone jack on the front of the set. The 1/8" jack plug that I bought from Radio Shack to run to the external speaker had a metal outer case, and so was at the same potential as the shield. Yup, if you touched that plug with the TV plugged in, it was hot and would give you a shock.