Idea for fundamentals Friday... How composite video/analogue TV is detected decoded onto a CRT (and PAL/NTSC colour burst) and audio separation etc. Someone else probably did it but might be interesting
+william fleete Great idea! Especially explaining how the PLL inside a colour decoder locks on to the colour burst etc. Also, how a Composite signal has the extra modulation added to it, how the sync and black-level stuff is clamped / extracted, how the flyback drives the tube, showing the vertical deflection sawtooth, and what the various CRT voltages do. I like it. ;)
+iuriuss Not true... Arcade cabinets old enough to not use RGB, vintage computer and game consoles for those who collect and enjoy retro stuff... These all use composite or S-Video signals, or even RF modulated signals. Keeping this knowledge accessible actually will mean something for people who maintain such relics, when they find their trusty old TV from 1987 finally bit the dust, and they realize that a few TVs are even omitting ANY kind of analog input. How long till no TVs even bother with it? I'm a CED VideoDIsk aficionado (vinyl video records, made in the early 80s). I already have to feed the output of my machine through a VCR to view it on my TV. Not everyone is content to forget history. Some of us enjoy the retro glow of the vintage CRT, and the pops of vinyl.
Every time the voltage drops to 0 a new line is started, and the signal is simply brightness onto the screen. At the end of the last line, the display is reset to the top left. Color burst is a weird world and you'd have to look into it on your own.
I'm really impressed by the stated 1,8 W power consumption. Given all the linear magic that goes into a CRT TV, that definitely came as a surprise to me. (Also, fix it.)
I dont see one transistor in that, all ICs, where is the horizontal output transistor. I bet they made all those ICs specifically for that set. I bet its got a bad cap or shorted teardrop causing no deflection
Wow, Dave. Back in the early 90s, I was digging through a friend's garage with him when my interest in tech was tearing it apart and we found and took one of those same units apart. It was really nostalgic seeing you open that up, bringing me back to my time around 10 years old.
Here is one of those gadgets as a kid growing up in the 80's and 90's that I really wanted to own, but never did. This would have been quite expensive in its day by the looks of it. I'm not even a minute into the video though so I haven't seen the guts of it yet, so I might have to eat my words here.
That Matsushita chipset was used in all Panasonic sets, you got a later set of variants for colour, using the same IF and a colour decoder. Was used in all the small portable sets, till they went and integrated everything from the tuner IF output to the output for the drivers onto one skinny 0.05 pitch 40 pin DIP package which did everything in one. What is faulty is the vertical drive chip, or the associated capacitors on it. You can see the horizontal drive has a leaky coupling cap from the shifted trace.
For reference Matsushita is pronounced mat-soo-shee-tah. They owned National and Panasonic before they rebranded a few years ago. Panasonic is great with old datasheets and manuals. I owned an electric typewriter and needed a section from the manual. After a quick email they sent a scan of the relevant pages over. I wish other companies were like that.
Thanks, Dave ! Love your videos ! In HD, you can see leaked capacitors near the vertical driver IC. There's also some visible corrosion damage to the traces caused by the leaked electrolyte. In case you plan a repair :-)
A buddy of mine had something similar when we were kids, probably about 4 times the case size, but the same size of screen. Undoubtedly powered off by 100 or so D cells. But! We could watch Saturday morning cartoons in a tree house.
if you want a REALLY small CRT then look at early video recorders, the viewfinders were tiny CRT displays, commonly round face and a rectangular front mask to show the picture area. :)
+Andrew Sparrow I was just about to mention that. The circuit boards that drive these things are also pretty easy to hack. They usually just have a power and composite video input. Pretty neat to play around with.
My uncle had a really early video camera and it had a separate unit that looked a bit like this to actually monitor the output of the camera. The tape recorder, camera, and view finder were all separate units that he had strapped on while he used it..
I actually had a black and white CRT TV/AM FM Stereo Radio/Dual Cassette Recorder ... ect all the perks detachable speakers with built in woofers.. yes all of that and took it to school everyday with my brothers Nintendo to play Super Mario and watch shows during recess... yes I did say recess lol it was approx 2"x3" screen and Mario was smaller than the eraser on a pencil.. did not only take it to school I took it everywhere! Wish I still had it... Love to watch your teardowns, as well as many others who do teardowns! I am just starting to get into electronics as hobby and didn't/still don't know anything but learn every single time I watch a teardown no matter who is doing it lol... I love taking things to bits to see what really is going on in there but neglect to put them back together (not mentioning hoarding goes way back in my family)! At this time I have 2 CRT TVs a Sanyo and can not remember other; microwave; 2 CRT Sensormatic Video Monitors date code 9642 black and white, a brother 2600 intellifax got for $25 works but no cables; a laptop soon to be 2; 2 KEURIGs identical; several motorized gadgets; a handful of cell phones (non-smart); and bits n pieces of an uniden Stereo Satellite Receiver UST-7000 with original remote lots of LEDs and segments for Sat. Position/Clock, Audio, Channel so many fun things;...and a whole lot more like CB Radios and other MP3 and Stereo type stuffs... So much to build from them all and no time to touch any of them til I can get my 4'x4'x7' tent cleaned out and ventilation redone so that I will have a work space for all this.. yes that is going to be my workspace not sure where to put everything til I can get to them... And love the dumpster dives all of them for one I have to live vicariously through that now cuz here in Montana and many other places they either patrol or have someone posted at all the wonderful "Green Malls" and will get fined and/or arrested for dumpst....shopping for supplies... I am also not allowed at this point to bring anything else home anyhow til I have everything else taken care of.. Thank you for all you do to help us and yourself learn and understand new things!!! sorry I kinda ramble... oh what I wouldn't do to have even 1/8th of the things some of the TH-camrs have/had/thow out/etc... and just a splash of what they know and can do with what they know...
I remember our family having something very similar stored in our camper. It was a little bigger and had a radio tuner on it as well. I think the screen was around 4 inches or close to that. Still pretty damn small. It could be powered through the mains or battery. It really sucked the power down on those batteries real quick when using the TV part. My dad would set it up on a table near the camper and lounge back to listen to the radio. Ahhh the good old days.
My grandparents had a 9" portable RCA TV in their garage that I found in 2008. I was staying with them for the summer and had my grandfather get a power cable for it, so I could watch TV in my room at their house! It was fun to have, a tiny little TV, but then TV went digital. :(
Oi! yeah the micro portable TV's were a must have for security guards on lonly posts back in the day. Mum had a 5 inch mini portable she would take to work with her :)
Not this particular model, but in the 90's we had a larger B&W CRT portable television. My father and I would watch the cricket on it while out at family things. Nowadays I stream it on my phone.
Back in the early 1950s, my Dad got a "bubble" to place in front of the 9" or 10" CRT. It made the image appear larger. The bubble was about 12" or 14" in diameter. It came with an adjustable stand. I remember he had to fill it with mineral oil. After they got a set with a larger screen, they had notes for it, my brother and I used it to burn Ants and other insects and arachnids. They sometimes show up in junk shops, AKA: Antique Boutiques, AKA junk dealer.
I used a portable CRT TV when I was a kid back in the 80s and 90s. Though it wasn't this particular model but more of a little black cube ( can't remenber the name). Used it mainly when I was camping.
I was watching this on my more-than-HD colour smartphone, when I realised how incredibly symbolic that was in terms of the technological progress that's happened over the past 30-or-so years...
People used to bring these to games to watch the game while they are at the game. Big stadium, lousy PA makes it hard to keep track sometimes. That's pretty much the only time I've ever seen them used.
Aww...I was hoping you'd do what we did back in the day... If you've got horizontal drive, just disconnect the vertical yoke winding leads from the board and connect them to an audio amplifier playing music or the output of your signal generator. Instant mini oscilloscope!
At 21:22 it's quite funny to see that the horizontal deflection chip is horizontally mounted while the vertical deflection chip is vertically mounted on the pcb. That makes it even more obvious which one is doing what kind of work :)
Our new $25K (without lens or viewfinder) camcorders have B+W viewfinders which use this size tube. The choice of viewfinders included a couple of color LCD models, but we chose B+W CRTs for their superior image quality. The LCD models were as expensive or cheaper than the CRT. Even our new studio cameras have 7 inch B+W CRTs (177.8 mm for the unenlightened). One big problem we have is that the big built-in magnifier can concentrate the sun onto the screen and surrounding case. I've had cameramen tell me that their viewfinder was on fire because they saw smoke. The black plastic surrounding the CRT had started to char, but we've had no actual fires- yet. The CRTs never show any damage, though. I doubt an LCD could stand up to that abuse.
Wow Dave... just seeing the news about "the most dangerous storm in NSW history" - I hope that since you have posted this that you and your family are all OK!
You should have seen hurricane Abigail up in Scotland a few weeks ago. Total destruction. I saw pieces of paper literally being blown around the streets, and even one of my plastic garden chairs blew over! Frightening.
Dave, just a small heads-up when looking for date codes in Japanese equipment: Japan also has it's own system for counting years which is still commonly used nowadays. So it might be that there are date codes on them but just not in the Western format. The Murata tuner has "623" on it, which *might* be Showa 62 in March which is March 1987.
That has to be a re-branded Panasonic TV - I got that exact model (TR-1010P - magnifier included!) branded as Panasonic in 1984 as a Christmas gift. Great unit! Used it until 1989 and then sold it for $100 to a friend of mine. Replaced with a Casio TFT Color portable TV.
+Aaron Hammett That's not the cap which is leaking, it's glue which fixes the cap to the PCB. The caps in this section are not very stressed so it's extremely unlikely that they fail.
Not this time. The corrosion is visible under the SIP Vertical driver. I know the difference between glue and damage. It is tied to the sawtooth generator in the chip.
+Aaron Hammett You're right. Most of the small caps need to be replaced, there is corrosion present under the vertical IC. The seals on the electrolytic capacitors from 1980s and early 1990s are now failing, the acid is leaking out, causing trouble and damaging PCBs. Been replacing the them and even SMD type ones on early 1990s Apple products for some years now, they all leak, sometimes they'll even take out a trace or two with them.
Definitely repairable . . . Good to see some old analog RF stuff . . . The AN series were very popular back then . . . they could be found in just about everything!
My father (ham-radio guy SM0HGH) used to go on about the "chop-chop" transmitters from Soviet union. He really hated them. This is back in the 70's-80's, when they started to really mess with the ham-frequeny bands.
Wow it king of spooked me when Dave's hands first came into frame. by itself, the TV looked considerably larger and then these giant paws burst into the scene
My uncle had one of these, he used it as a second TV to catch the news in the kitchen during dinner. If there was anything interesting he would run out to the living room to see what was happening on his 24 incher.
I have one of these little TV's, picture quality is very good indeed. I am sure it dates from 1982, I bought mine second hand in the late 80's. If you can't be bothered fixing it, send it to me, I would love to restore it to working order.
Cool! That thing of beauty comes from the Matsushita (nowadays Panasonic) corporation! Btw: the serial number tells that this unit was made on January 10, 1983. Cheers!
Right off the bat: That slip-on magnifier looks like a great double for a shade as well, for viewing in daylight! Too bad it doesn't have a D/A converter built in!
Dave, another brilliant video, as always. Chances are one of those horrid little tantalum caps around the vertical chip is SC, I would blanket change the lot, they are notorious for going SC in heat.
Hi Dave and Dave 2, please make a repair video of this little TV. Would be nice to see if it will work again, if not would be an interesting trouble shooting video.
I've seen the flex circuits used across boards. I repaired a JVC car stereo that had one flex layer that covered a full board on the bottom then to another board up the side to another on the top and then to the tape head and front panel. Since the tape head moved, the flex circuit cracked. Hack that into some video game display. Write your own asteroids game or go full retro and do a pong game ;)
Long about that era, I seem to remember TV news reporters out doing 'live' spots using similar portables to monitor when they were live... also in 'about' that same time period I was lucky enough to get stuck doing jury duty; and remember seeing 6 or 7 people in various assembly rooms watching[1] the things. This was in Los Angeles... but aside from those sightings, I don't remember ever seeing any others other than in TV ads, or on display at Radio Shack, and suspect once all was said and done... they weren't big sellers. [1] And soap opera's at that... ugh
Matsushita is OEM for other company, they produce IC, transistor, tube, capacitor, potentio, etc... Panasonic, National and Technics are Matsushita's brand for consumer market.
+Faisal Kadal There are also a lot of other manufacturers selling their products under the Panasonic brand, i.e. my own TV is Panasonic branded, but manufactured by Vestel, a turkish manufacturer that also sells their products under their own name, but not here in Germany, since no one would know the name "Vestel". Actually, in the service menu it's even possible to change branding and look of the UI to many other brands, like Vestel itself, Telefunken or some other names i've never heard of. I wonder what percentage of modern TVs is still sold under the actual manufacturers/developers name, since almost every single modern TV I've seen was not. (sorry, I'm not used to writing longer texts in english)
Panasonic like National and Technics are brand for consumer market, Matsushita just own the brands. Like any other consumer brand, they are manufactured to other OEM to cut price. In Indonesia National also manufactured not by Matsushita itself. Matsushita still exist and manufacturing OEM product for other brand and their own brand Panasonic and Technics (Matsushita decided to ended National brand unfortunately).
1984 might be a bit late. According to some sites it was released in 1981 and I spot 1981 and 1982 date codes on the IC's, CRT and yoke; The first digit is the last digit of the year and the letter behind it usually is the month - I'm not sure what's up with 23 and 2N, though, but it is a date code starting with the year without a doubt. Maybe on the IC's they encoded the week using a sequence with the stroke above the letter. I second that you should try and repair it, can't be that difficult.
I love that thing! please fix it!!! there is some part of me that wants that little mistery solved! even if most likely its the caps leaking, that would put a smile on my face :)
Nice little TV, I would have bought one of these if I could have afforded it at the time. It would not be too hard to fix that if all the screws and parts are there. The transistor for the H-deflection is probably in the tin can where the transformer is located. I would like that little TV, and does not matter if there are no broadcasts. I could put a small transmitter at my home and play what I want at a level low enough that the FCC would not mind.
My Grandfather had one which looked exactly the same but I'm pretty sure it was a Panasonic... He used to bring with when he dragged me to the Rose Bowls of hand-egg. :-)
Please, please, please make some videos with you exploding/melting some electrical components; small resistors, capacitors, diods, transistors, etc etc
They made one board design and then realized they had to put a speaker over there in order to save space so they redesigned the board into two boards connected by a flex cable.
![fellow fellow - พรุ่งนี้ไม่มีใครรู้ feat. INK WARUNTORN [OFFICIAL MV]](http://i.ytimg.com/vi/QP6JyjYx_W0/mqdefault.jpg)
Fix it! Fix it! Fix it!
+The Blue Farmer I concur! Would love to see the repair!
+The Blue Farmer it will never work, as you need an analog tv signal, of which there isn't any left......
+The Blue Farmer Exactly what I was thinking.
+The Blue Farmer fix it mod(plugin) it and then but all together again this is was I thought watching this.
+jusb1066 i have a modulator
and i can trow together a small transmitter
I love the density of the design, it just all sticks together and holds its shape without the case.
The vertical/horizontal ICs are actually vertically/horizontally positioned.
+Shadow Gabriel You stole my comment :)
I thought I was the only one that loved the smell of electronics!
Would love to see this little thing repaired.
Someone put love on this project. I'm surprised how well designed it is
This beauty deserves a repair and to be preserved!
Idea for fundamentals Friday... How composite video/analogue TV is detected decoded onto a CRT (and PAL/NTSC colour burst) and audio separation etc. Someone else probably did it but might be interesting
+william fleete Oh! I second this!
+william fleete Great idea!
Especially explaining how the PLL inside a colour decoder locks on to the colour burst etc.
Also, how a Composite signal has the extra modulation added to it, how the sync and black-level stuff is clamped / extracted, how the flyback drives the tube, showing the vertical deflection sawtooth, and what the various CRT voltages do. I like it. ;)
*****
today yes. but it will still interesting none the less and it'll be a history lesson on how we used to get TV. and how colour TV used t work.
+iuriuss Not true... Arcade cabinets old enough to not use RGB, vintage computer and game consoles for those who collect and enjoy retro stuff... These all use composite or S-Video signals, or even RF modulated signals. Keeping this knowledge accessible actually will mean something for people who maintain such relics, when they find their trusty old TV from 1987 finally bit the dust, and they realize that a few TVs are even omitting ANY kind of analog input. How long till no TVs even bother with it? I'm a CED VideoDIsk aficionado (vinyl video records, made in the early 80s). I already have to feed the output of my machine through a VCR to view it on my TV. Not everyone is content to forget history. Some of us enjoy the retro glow of the vintage CRT, and the pops of vinyl.
Every time the voltage drops to 0 a new line is started, and the signal is simply brightness onto the screen. At the end of the last line, the display is reset to the top left. Color burst is a weird world and you'd have to look into it on your own.
I'm really impressed by the stated 1,8 W power consumption. Given all the linear magic that goes into a CRT TV, that definitely came as a surprise to me. (Also, fix it.)
I've used a similar portable TV made by Sanyo, it looked very similar to this one actually, but it also had a clock and an AM/FM radio in it.
I dont see one transistor in that, all ICs, where is the horizontal output transistor. I bet they made all those ICs specifically for that set. I bet its got a bad cap or shorted teardrop causing no deflection
Fancy seeing you here, Shango. Looked like there was some corrosion on the vertical IC to me - that's probably worth a look as well.
shango066 yes
Wow, Dave. Back in the early 90s, I was digging through a friend's garage with him when my interest in tech was tearing it apart and we found and took one of those same units apart. It was really nostalgic seeing you open that up, bringing me back to my time around 10 years old.
Nice one Dave, and well done David2 on your win!
+1 for fixing it. I love old stuff, miss the CRTs too.
Awesome teardown! Thanks!
And congrats to David 2!
Famously used by extra #27 on Miami Vice, sitting on the hotel porch across from south beach while Crockett drives by. Every episode.
Here is one of those gadgets as a kid growing up in the 80's and 90's that I really wanted to own, but never did. This would have been quite expensive in its day by the looks of it. I'm not even a minute into the video though so I haven't seen the guts of it yet, so I might have to eat my words here.
That Matsushita chipset was used in all Panasonic sets, you got a later set of variants for colour, using the same IF and a colour decoder. Was used in all the small portable sets, till they went and integrated everything from the tuner IF output to the output for the drivers onto one skinny 0.05 pitch 40 pin DIP package which did everything in one.
What is faulty is the vertical drive chip, or the associated capacitors on it. You can see the horizontal drive has a leaky coupling cap from the shifted trace.
For reference Matsushita is pronounced mat-soo-shee-tah. They owned National and Panasonic before they rebranded a few years ago. Panasonic is great with old datasheets and manuals. I owned an electric typewriter and needed a section from the manual. After a quick email they sent a scan of the relevant pages over. I wish other companies were like that.
Thanks, Dave ! Love your videos ! In HD, you can see leaked capacitors near the vertical driver IC. There's also some visible corrosion damage to the traces caused by the leaked electrolyte. In case you plan a repair :-)
Oh yes, yes we do want a repair video, please!
A buddy of mine had something similar when we were kids, probably about 4 times the case size, but the same size of screen. Undoubtedly powered off by 100 or so D cells. But! We could watch Saturday morning cartoons in a tree house.
A repair video of this nice TV set would be a great add-on to this video.
Wow.... Thank you very much for turning that thing ON.
if you want a REALLY small CRT then look at early video recorders, the viewfinders were tiny CRT displays, commonly round face and a rectangular front mask to show the picture area. :)
+Andrew Sparrow I was just about to mention that. The circuit boards that drive these things are also pretty easy to hack. They usually just have a power and composite video input. Pretty neat to play around with.
My uncle had a really early video camera and it had a separate unit that looked a bit like this to actually monitor the output of the camera. The tape recorder, camera, and view finder were all separate units that he had strapped on while he used it..
I actually had a black and white CRT TV/AM FM Stereo Radio/Dual Cassette Recorder ... ect all the perks detachable speakers with built in woofers.. yes all of that and took it to school everyday with my brothers Nintendo to play Super Mario and watch shows during recess... yes I did say recess lol it was approx 2"x3" screen and Mario was smaller than the eraser on a pencil.. did not only take it to school I took it everywhere! Wish I still had it...
Love to watch your teardowns, as well as many others who do teardowns! I am just starting to get into electronics as hobby and didn't/still don't know anything but learn every single time I watch a teardown no matter who is doing it lol... I love taking things to bits to see what really is going on in there but neglect to put them back together (not mentioning hoarding goes way back in my family)! At this time I have 2 CRT TVs a Sanyo and can not remember other; microwave; 2 CRT Sensormatic Video Monitors date code 9642 black and white, a brother 2600 intellifax got for $25 works but no cables; a laptop soon to be 2; 2 KEURIGs identical; several motorized gadgets; a handful of cell phones (non-smart); and bits n pieces of an uniden Stereo Satellite Receiver UST-7000 with original remote lots of LEDs and segments for Sat. Position/Clock, Audio, Channel so many fun things;...and a whole lot more like CB Radios and other MP3 and Stereo type stuffs... So much to build from them all and no time to touch any of them til I can get my 4'x4'x7' tent cleaned out and ventilation redone so that I will have a work space for all this.. yes that is going to be my workspace not sure where to put everything til I can get to them...
And love the dumpster dives all of them for one I have to live vicariously through that now cuz here in Montana and many other places they either patrol or have someone posted at all the wonderful "Green Malls" and will get fined and/or arrested for dumpst....shopping for supplies... I am also not allowed at this point to bring anything else home anyhow til I have everything else taken care of..
Thank you for all you do to help us and yourself learn and understand new things!!! sorry I kinda ramble... oh what I wouldn't do to have even 1/8th of the things some of the TH-camrs have/had/thow out/etc... and just a splash of what they know and can do with what they know...
That was great. Would be really up for seeing a repair video!
I remember our family having something very similar stored in our camper. It was a little bigger and had a radio tuner on it as well. I think the screen was around 4 inches or close to that. Still pretty damn small. It could be powered through the mains or battery. It really sucked the power down on those batteries real quick when using the TV part. My dad would set it up on a table near the camper and lounge back to listen to the radio. Ahhh the good old days.
My grandparents had a 9" portable RCA TV in their garage that I found in 2008. I was staying with them for the summer and had my grandfather get a power cable for it, so I could watch TV in my room at their house! It was fun to have, a tiny little TV, but then TV went digital. :(
Would've been a nice car / truck TV for road trips back in the day! :D I would love to see it function though! Repair it!!!
Oi! yeah the micro portable TV's were a must have for security guards on lonly posts back in the day. Mum had a 5 inch mini portable she would take to work with her :)
Not this particular model, but in the 90's we had a larger B&W CRT portable television. My father and I would watch the cricket on it while out at family things. Nowadays I stream it on my phone.
Back in the early 1950s, my Dad got a "bubble" to place in front of the 9" or 10" CRT. It made the image appear larger.
The bubble was about 12" or 14" in diameter. It came with an adjustable stand. I remember he had to fill it with mineral oil. After they got a set with a larger screen, they had notes for it, my brother and I used it to burn Ants and other insects and arachnids. They sometimes show up in junk shops, AKA: Antique Boutiques, AKA junk dealer.
I used a portable CRT TV when I was a kid back in the 80s and 90s. Though it wasn't this particular model but more of a little black cube ( can't remenber the name). Used it mainly when I was camping.
Love your videos Dave! Thanks!
Props for turning it on before taking it apart. Cheers :)
Repair video please. Another good one again. Thanks Dave
I had one of those TV's back in the day. Same battery compartment. The one I had was made by Panasonic at lease that's what it said. NICE!!!
I was watching this on my more-than-HD colour smartphone, when I realised how incredibly symbolic that was in terms of the technological progress that's happened over the past 30-or-so years...
People used to bring these to games to watch the game while they are at the game. Big stadium, lousy PA makes it hard to keep track sometimes. That's pretty much the only time I've ever seen them used.
Aww...I was hoping you'd do what we did back in the day... If you've got horizontal drive, just disconnect the vertical yoke winding leads from the board and connect them to an audio amplifier playing music or the output of your signal generator. Instant mini oscilloscope!
If I was you, I would fix it. Firstly, I would check is the vertical coil OK, then move on further
Would love to see a repair for that. I love those tiny little CRTs.
At 21:22 it's quite funny to see that the horizontal deflection chip is horizontally mounted while the vertical deflection chip is vertically mounted on the pcb. That makes it even more obvious which one is doing what kind of work :)
Our new $25K (without lens or viewfinder) camcorders have B+W viewfinders which use this size tube. The choice of viewfinders included a couple of color LCD models, but we chose B+W CRTs for their superior image quality. The LCD models were as expensive or cheaper than the CRT. Even our new studio cameras have 7 inch B+W CRTs (177.8 mm for the unenlightened).
One big problem we have is that the big built-in magnifier can concentrate the sun onto the screen and surrounding case. I've had cameramen tell me that their viewfinder was on fire because they saw smoke. The black plastic surrounding the CRT had started to char, but we've had no actual fires- yet. The CRTs never show any damage, though. I doubt an LCD could stand up to that abuse.
Wow Dave... just seeing the news about "the most dangerous storm in NSW history" - I hope that since you have posted this that you and your family are all OK!
+Heath Wells Nowhere near me. Sydney is a big place.
+EEVblog Best teardown ever seen in your Blog. Hope you could fix it. It was a dream to get one of these devices in 80s
+Abhinesh Sethumadhavan I'd love to see a repair attempt as well ;)
+Heath Wells explains why he`s solar panel was damaged..
You should have seen hurricane Abigail up in Scotland a few weeks ago. Total destruction. I saw pieces of paper literally being blown around the streets, and even one of my plastic garden chairs blew over! Frightening.
really well designed and built for 80's
I'd hook it up to a rasepbery pi and make my self an 80's style cyberpunk/shadowrun deck….
Long live CRTs... I still use a Trinitron TV and a Trinitron Full HD PC Monitor, I love these big ol' tubes
Dave, just a small heads-up when looking for date codes in Japanese equipment: Japan also has it's own system for counting years which is still commonly used nowadays. So it might be that there are date codes on them but just not in the Western format. The Murata tuner has "623" on it, which *might* be Showa 62 in March which is March 1987.
I watched the king dome, controlled demolition on a freeway overpass. Used a portable BW CRT to keep track of the news coverage and countdown.
My uncle had a similar TV. He took it to sporting events so he could watch the coverage while he was in the stadium.
Thanx, Dave for this teardown..:) :)
.... Reminded me of the 'Space 1999' TV series communicator/Door opener.
A repair would be awesome!
That has to be a re-branded Panasonic TV - I got that exact model (TR-1010P - magnifier included!) branded as Panasonic in 1984 as a Christmas gift. Great unit! Used it until 1989 and then sold it for $100 to a friend of mine. Replaced with a Casio TFT Color portable TV.
@eevblog vertical deflection collapse is probably caused by the leaking cap next to the chip.
+Aaron Hammett That's not the cap which is leaking, it's glue which fixes the cap to the PCB. The caps in this section are not very stressed so it's extremely unlikely that they fail.
Not this time. The corrosion is visible under the SIP Vertical driver. I know the difference between glue and damage. It is tied to the sawtooth generator in the chip.
+Aaron Hammett You're right. Most of the small caps need to be replaced, there is corrosion present under the vertical IC. The seals on the electrolytic capacitors from 1980s and early 1990s are now failing, the acid is leaking out, causing trouble and damaging PCBs. Been replacing the them and even SMD type ones on early 1990s Apple products for some years now, they all leak, sometimes they'll even take out a trace or two with them.
+Aaron Hammett I WOULD SAY YOU ARE CORRECT ON THE CAP PROBLEM
+Aaron Hammett I ENJOY BUILDING AND REBUILDING / REPARING CRT TV'S MOSTLY B&W TYPS
Definitely repairable . . . Good to see some old analog RF stuff . . . The AN series were very popular back then . . . they could be found in just about everything!
It's a dog's breakfast... lol. Didn't know that phrase. Love it
Note the horizontal and vertical processors are mounted in the correct axes. :)
My father (ham-radio guy SM0HGH) used to go on about the "chop-chop" transmitters from Soviet union. He really hated them. This is back in the 70's-80's, when they started to really mess with the ham-frequeny bands.
Wow it king of spooked me when Dave's hands first came into frame. by itself, the TV looked considerably larger and then these giant paws burst into the scene
I had a similar portable B&W TV that I connected to a VHS camcorder so that I could watch movies in the backseat while on long car rides.
My uncle had one of these, he used it as a second TV to catch the news in the kitchen during dinner. If there was anything interesting he would run out to the living room to see what was happening on his 24 incher.
I have one of these little TV's, picture quality is very good indeed.
I am sure it dates from 1982, I bought mine second hand in the late 80's.
If you can't be bothered fixing it, send it to me, I would love to restore it to working order.
Cool! That thing of beauty comes from the Matsushita (nowadays Panasonic) corporation!
Btw: the serial number tells that this unit was made on January 10, 1983.
Cheers!
Oh yes about time! can’t wait to watch :)
Right off the bat: That slip-on magnifier looks like a great double for a shade as well, for viewing in daylight!
Too bad it doesn't have a D/A converter built in!
Love the quality of the videos. A pleasure. I mean the Image is just perfect. What's your camera ?
+Younes Ghanem He's got more than one, but I think one he noted was a Sony NEX-VG30. Not cheap. ;)
something, something, teardown, something, something complete! :D
hi Dave,
Panasonic is a brand of Matsushita corporation, if I'm not mistaken. that's why they both have the data sheets.
Dave, another brilliant video, as always. Chances are one of those horrid little tantalum caps around the vertical chip is SC, I would blanket change the lot, they are notorious for going SC in heat.
Great teardown, love those mini crt's maybe you could hack it into a, just for fun mini oscilloscope.
looked like corrosion on the contacts of the vertical chip just in between there I could see loads of it.
Dave you tease repair that thing.
I remember having a portable TV back in '87 or '88. It was lots of fun to bring into school; could totally derail the teachers. :D
Hi Dave and Dave 2, please make a repair video of this little TV. Would be nice to see if it will work again, if not would be an interesting trouble shooting video.
As a kid I hooked my NES up to this thing, Taped the copper from the RFT cable to the antenna. Vertical sync was not that great haha.
I've seen the flex circuits used across boards. I repaired a JVC car stereo that had one flex layer that covered a full board on the bottom then to another board up the side to another on the top and then to the tape head and front panel. Since the tape head moved, the flex circuit cracked.
Hack that into some video game display. Write your own asteroids game or go full retro and do a pong game ;)
Haha that thumbnail is kinda misleading. Love it!
Ha . . that's a new expression . . . "Dog's breakfast"! Gotta remember that one . . .
Long about that era, I seem to remember TV news reporters out doing 'live' spots using similar portables to monitor when they were live... also in 'about' that same time period I was lucky enough to get stuck doing jury duty; and remember seeing 6 or 7 people in various assembly rooms watching[1] the things. This was in Los Angeles... but aside from those sightings, I don't remember ever seeing any others other than in TV ads, or on display at Radio Shack, and suspect once all was said and done... they weren't big sellers.
[1] And soap opera's at that... ugh
Matsushita is OEM for other company, they produce IC, transistor, tube, capacitor, potentio, etc...
Panasonic, National and Technics are Matsushita's brand for consumer market.
+Faisal Kadal There are also a lot of other manufacturers selling their products under the Panasonic brand, i.e. my own TV is Panasonic branded, but manufactured by Vestel, a turkish manufacturer that also sells their products under their own name, but not here in Germany, since no one would know the name "Vestel". Actually, in the service menu it's even possible to change branding and look of the UI to many other brands, like Vestel itself, Telefunken or some other names i've never heard of. I wonder what percentage of modern TVs is still sold under the actual manufacturers/developers name, since almost every single modern TV I've seen was not. (sorry, I'm not used to writing longer texts in english)
Panasonic like National and Technics are brand for consumer market, Matsushita just own the brands. Like any other consumer brand, they are manufactured to other OEM to cut price. In Indonesia National also manufactured not by Matsushita itself.
Matsushita still exist and manufacturing OEM product for other brand and their own brand Panasonic and Technics (Matsushita decided to ended National brand unfortunately).
It would be neat to build a mini retro CRO using the CRT and the case.
1984 might be a bit late. According to some sites it was released in 1981 and I spot 1981 and 1982 date codes on the IC's, CRT and yoke; The first digit is the last digit of the year and the letter behind it usually is the month - I'm not sure what's up with 23 and 2N, though, but it is a date code starting with the year without a doubt. Maybe on the IC's they encoded the week using a sequence with the stroke above the letter.
I second that you should try and repair it, can't be that difficult.
I would modify the deflection for X-Y mode, make a CRT clock :-)
I'm. Not that old and I use one like this... These things rock
Correction,, I used one..
I love that thing! please fix it!!! there is some part of me that wants that little mistery solved! even if most likely its the caps leaking, that would put a smile on my face :)
Nice little TV, I would have bought one of these if I could have afforded it at the time. It would not be too hard to fix that if all the screws and parts are there. The transistor for the H-deflection is probably in the tin can where the transformer is located. I would like that little TV, and does not matter if there are no broadcasts. I could put a small transmitter at my home and play what I want at a level low enough that the FCC would not mind.
Looking forward to updates on the broken solar panel
Thumbs up for more tear-downs.
Ah yeah hate the Russian woodpecker jamming my ULF.
And definitely repair this one seems worth it, nice weird piece of history in decent condition!
Merry Christmas
You could fix it and then send it to Ben! He will make a portable console out of it! It would be an awesome project.
If you can fix it, you should try to mod the uhf tuner to pickup atv broadcasts on 70cm.
Mr. Spock misses his science tricorder. Give it back!
Hi Dave, May I suggest that you tweak your rule and add "just" like in the following: Don't just turn it on, take it apart.
My Grandfather had one which looked exactly the same but I'm pretty sure it was a Panasonic...
He used to bring with when he dragged me to the Rose Bowls of hand-egg. :-)
+Rico Swave I believe National is Panasonic
Please, please, please make some videos with you exploding/melting some electrical components; small resistors, capacitors, diods, transistors, etc etc
They made one board design and then realized they had to put a speaker over there in order to save space so they redesigned the board into two boards connected by a flex cable.