Thanks for the time you put into making these videos. It's nice to find quality content of actual diagnosis and repairs of these little pocket tv's. I've had my Pocketvision 29 since Christmas 1997. Still going strong. I want to start collecting them and seen a bunch on ebay with green screens, no hint of the tuning bar and I suspected the electrolytics were probably starting to die. You've confimed it.
Thank You my man! Today i bought BNIB stock Casio TV400 (bought in Germany in 1988 - i have receipt!) and it was not working, it looked very similar as on your video - since i have no measuring equipment (apart from multimeter) i had no clue what to start with - after replacing same 2 caps it's now back to life! Thank You so much!
This week I also received a Panasonic TR-1030P 1984 BW tv. After cleaning the small amount of corrosion from the battery contacts and the board and had to repair the +ve flex cable from the battery terminal the 37 yo battery charged up and is working great. It really has a very clear sharp picture too. I have a Panasonic CT-101 color TV 1984 too working great.
I had a TV-430, the picture was terrible but it was a miracle to have something so small that you could watch TV on. I even remember watching snooker it, though the balls were sub-pixel resolution. It was mainly to listen to the commentary which wasn’t available elsewhere!
Wow I just tv-400 for a few bucks off eBay that’s DOA and I took it apart and, like you, I figured it had no hope for repair but it’s doing what seems to be the exact same thing, no picture and high pitch whine out the speaker. Time to get the ESR meter and maybe there’s hope for repair so I can remain undefeated! 😆
I have few of this model and others of similar design with most of them working nice with my analogue TV transmitter. I'm about to receive a Sony Indextron watchcube in the mail this week :)
Hey, I still have my Casio pocket TV. Its a later model than this. Still works, although there is nothing it can pick up. I bought it in the early 90's as a kid with my birthday money. Cost me about £50 or so. It was my first TV, I felt like I was growing up lol. I used to watch Babylon 5 on it every morning. Then my dad handed me the old JVC VHS and I used that to record programmes whilst I was at school then I would watch them back on this! Amazingly as a kid in the 90's I was able to use this as my monitor for a Sinclair Spectrum 2+. It belonged to a mate and he wanted me to write a program for him to help him manage his cake making business (he made and sold wedding cakes at 14 years old). Dont ask me how the hell I was able to read the BASIC code I was writing on that tiny screen. It was a higher resolution screen than this model however, but you could still see the pixels to know they were there. I dont know HOW I did it, but I did...
Can be used for closed circuit video only. The resolution on this thing is horrible. I believe the Fisher Price Pixlvision that records on audio cassettes had a better picture.
@@12voltvids Pixelvision or PXL-2000. I think it was like 120x90 resolution, recorded in greyscale, ran at 15 frames a second (non-interlaced), and used audio tape at a much faster speed than normal playback.
The guy that owns them has a bunch all with the same problem. So he will use the video to get into his other ones to fix now that he knows where to look. Hope he doesn't have the same shocking experience i had. Yep the lamp driver bit me a few times. Have a nice RF burn on my fingers.
I think these were from the low resolution, passive matrix LCD era in which just having a color screen on a portable was considered cool and a novelty. I wonder what the resolution of that screen actually is. I am guessing probably 200 pixels or less wide, at maybe a 16 or 32 color palette (256 at the max). It was not until the active matrix LCD era that LCD color screens became very crisp and clear and had wider viewing angles with enough pixels for a decent image. But back then most laptops had monochrome screens, and that those did have color were quite pricey (I remember it was like $2500 to $5000 to get a laptop with an active matrix color screen in the mid to late 1990s). But I do know that McWill and other vendors make replacement and upgrade LCD screens for retro consoles like Sega Game Gear, Sega Nomad, Atari Lynx, Game Boy Color, and others. Perhaps one of these would work on a Casio Portable TV? I am not sure if it would or work not. It would depend on the resolution and interface the Casio uses to interface the screen and whether it is compatible.
Yes passive supertwist matrix. The TFT active matrix displays followed. I had one briefly that I thought i could use with my camera for color checking in the field but it was so bad it went back to the store the next day.
On SEGA Game Gear, the driver ICs are directly on the glass of the panel (3,2" with 160x146 resolution). At least a Servce Manual is available for the Game Gear, and you can check what kind of signal is sent to the drivers. Since driver ICs have BGA style package, maybe in few cases heat can solve some connexion to glass problems. Regardless of the price of solution like this, integration will be the key. In McWill or equivalent solutions you must deal with a FPGA board that translates signals for the modern panel. Plus the overall power consumption of these modern solutions can be worse than the original one.
Hi Dave, I've sold electronic components for over 20 years. There is a story about ELNA. Not sure it's true but its a good story . ELNA was started by an engineer working for Matsushita and stole the formula for the new Fish oil based electrolytic they were working on . The story goes that Matsushita had not finished the formula, the stabilizer had to be added.. That man stole an incomplete formula. and Started ELNA, Hence all the issues with ELNA caps.
It's funny you know because I heard a very similar story although companies were not mentioned. The story I heard and this goes back to the 1990s was that a disgruntled engineer stole the formula from his company used in the environmentally friendly miniature electric caps. The problem was he missed one of the ingredients that kept the pH stable. It was discovered that when the capacitor sat in a discharge state the electrolyte became slightly caustic at would over time corrode the rubber plug and the conductors leading out of the capacitor thereby causing a leak and the resulting damage from corrosive liquid leaching out onto the circuit board. Now I heard the story handed down from service people in the Sony corporation. Sony had one hell of a lot of problems with surface mounted electrolytic capacitors in their early camcorders as did Canon and many other companies. now if there are grammar or spelling mistakes in this I apologize as I'm using voice dictation and sometimes Google doesn't get it right. LOL
Hey I have 3 of this mini tvs, and the picture on all 3 unit don’t have the lines this one is showing! Maybe recap the whole unit because that tv still have a problem
That picture looks as bad as the TV400 I bought in 1988. The other thing it would rally drain batteries, like 4 AAs would last just over an hour. The later Casios that used TFT screens were better of course.
In the mid-80s I worked for the company that did the warranty service for the Sinclair TVs. There was a lot of returns because they were unreliable(like many Sinclair products). And the special flat battery(made by Polaroid) it used was quite expensive and didn't last long.
@@michaelturner4457 Yep he had a habit of skimping and using reject parts. The only thing i thought was quite reliable was the zx81 computer and zx spectrum (later versions). But he cheaped out on the memory chips lol. The black night watches were really bad. R.i.p clive sinclair.
I have a few casio lcd tv,s and one citizen all have awful pictures the lcd,s back then were not great and quite often even when we used rf in the uk it was often not great getting decent reception ,my little sony watchmen crt black and white is quite decent for what it is i have an rf to scart adaptor in the uk so i connect things up to the ones that have rf input .I always thought the seiko tv watches seemed cool back in the day though they were us only devices and no doubt terrible to watch and use .
I remember seeing the Seiko tv watch once. It was black and white and had a pretty poor picture. You had to carry a seperate tuner / battery pack and to watch it a mini plug was inserted into the side of the watch. That made the watch not even sweat proof. All for about 400.00!
![จบจนได้ ! | Black Myth: Wukong #007 [ตอนจบ?]](http://i.ytimg.com/vi/DSqvWndF0sw/mqdefault.jpg)
Thanks for the time you put into making these videos. It's nice to find quality content of actual diagnosis and repairs of these little pocket tv's.
I've had my Pocketvision 29 since Christmas 1997. Still going strong.
I want to start collecting them and seen a bunch on ebay with green screens, no hint of the tuning bar and I suspected the electrolytics were probably starting to die. You've confimed it.
That's right.
Thank You my man! Today i bought BNIB stock Casio TV400 (bought in Germany in 1988 - i have receipt!) and it was not working, it looked very similar as on your video - since i have no measuring equipment (apart from multimeter) i had no clue what to start with - after replacing same 2 caps it's now back to life! Thank You so much!
This week I also received a Panasonic TR-1030P 1984 BW tv. After cleaning the small amount of corrosion from the battery contacts and the board and had to repair the +ve flex cable from the battery terminal the 37 yo battery charged up and is working great. It really has a very clear sharp picture too. I have a Panasonic CT-101 color TV 1984 too working great.
I had a TV-430, the picture was terrible but it was a miracle to have something so small that you could watch TV on. I even remember watching snooker it, though the balls were sub-pixel resolution. It was mainly to listen to the commentary which wasn’t available elsewhere!
Got the same green screen issue with mine. I'll have to check those capacitors. Thanks for the video!
I noticed that When you are repairing big things like vcrs or TVs you talk loud. But when you are repairing small things like this you whisper.
Next one i will put on my radio voice.
Love that small electronic screw driver. I also have a 2” version of the Casio sold by Radio Shack. Still “works” too.
Wow I just tv-400 for a few bucks off eBay that’s DOA and I took it apart and, like you, I figured it had no hope for repair but it’s doing what seems to be the exact same thing, no picture and high pitch whine out the speaker. Time to get the ESR meter and maybe there’s hope for repair so I can remain undefeated! 😆
I have few of this model and others of similar design with most of them working nice with my analogue TV transmitter. I'm about to receive a Sony Indextron watchcube in the mail this week :)
I have an indextron projector
The same fluorescent bulb setup as the backlight on the LCD was also used in the SEGA Game Gear. I'm curious if they make LCD mods for this thing.
I think my Panasonic LCD used the same one too, but it burned out on my Panasonic.
Hey, I still have my Casio pocket TV. Its a later model than this.
Still works, although there is nothing it can pick up.
I bought it in the early 90's as a kid with my birthday money. Cost me about £50 or so. It was my first TV, I felt like I was growing up lol. I used to watch Babylon 5 on it every morning. Then my dad handed me the old JVC VHS and I used that to record programmes whilst I was at school then I would watch them back on this!
Amazingly as a kid in the 90's I was able to use this as my monitor for a Sinclair Spectrum 2+. It belonged to a mate and he wanted me to write a program for him to help him manage his cake making business (he made and sold wedding cakes at 14 years old). Dont ask me how the hell I was able to read the BASIC code I was writing on that tiny screen.
It was a higher resolution screen than this model however, but you could still see the pixels to know they were there.
I dont know HOW I did it, but I did...
Can be used for closed circuit video only. The resolution on this thing is horrible. I believe the Fisher Price Pixlvision that records on audio cassettes had a better picture.
@@12voltvids Pixelvision or PXL-2000. I think it was like 120x90 resolution, recorded in greyscale, ran at 15 frames a second (non-interlaced), and used audio tape at a much faster speed than normal playback.
I'm genuinely surpised you managed to fix that. I can't imagine they're built to last nearly this long
Unless already retired, somewhere an engineer is getting a bolloxing by a marketeer...
The guy that owns them has a bunch all with the same problem. So he will use the video to get into his other ones to fix now that he knows where to look. Hope he doesn't have the same shocking experience i had. Yep the lamp driver bit me a few times. Have a nice RF burn on my fingers.
"i dont think its capacitors" , moments later "finds dead capacitors"
I was keeping you in suspense.
I think these were from the low resolution, passive matrix LCD era in which just having a color screen on a portable was considered cool and a novelty. I wonder what the resolution of that screen actually is. I am guessing probably 200 pixels or less wide, at maybe a 16 or 32 color palette (256 at the max). It was not until the active matrix LCD era that LCD color screens became very crisp and clear and had wider viewing angles with enough pixels for a decent image. But back then most laptops had monochrome screens, and that those did have color were quite pricey (I remember it was like $2500 to $5000 to get a laptop with an active matrix color screen in the mid to late 1990s).
But I do know that McWill and other vendors make replacement and upgrade LCD screens for retro consoles like Sega Game Gear, Sega Nomad, Atari Lynx, Game Boy Color, and others. Perhaps one of these would work on a Casio Portable TV? I am not sure if it would or work not. It would depend on the resolution and interface the Casio uses to interface the screen and whether it is compatible.
Yes passive supertwist matrix. The TFT active matrix displays followed. I had one briefly that I thought i could use with my camera for color checking in the field but it was so bad it went back to the store the next day.
On SEGA Game Gear, the driver ICs are directly on the glass of the panel (3,2" with 160x146 resolution). At least a Servce Manual is available for the Game Gear, and you can check what kind of signal is sent to the drivers. Since driver ICs have BGA style package, maybe in few cases heat can solve some connexion to glass problems.
Regardless of the price of solution like this, integration will be the key. In McWill or equivalent solutions you must deal with a FPGA board that translates signals for the modern panel. Plus the overall power consumption of these modern solutions can be worse than the original one.
I have a little collection of theese tvs. Its hilarious if you hook a roku to one and try to pick something to watch based on shape and color.
I have a few too. 1 little Panasonic TFT LCD and the rest tiny crt sets.
Hi Dave, I've sold electronic components for over 20 years. There is a story about ELNA. Not sure it's true but its a good story . ELNA was started by an engineer working for Matsushita and stole the formula for the new Fish oil based electrolytic they were working on . The story goes that Matsushita had not finished the formula, the stabilizer had to be added.. That man stole an incomplete formula. and Started ELNA, Hence all the issues with ELNA caps.
It's funny you know because I heard a very similar story although companies were not mentioned. The story I heard and this goes back to the 1990s was that a disgruntled engineer stole the formula from his company used in the environmentally friendly miniature electric caps. The problem was he missed one of the ingredients that kept the pH stable. It was discovered that when the capacitor sat in a discharge state the electrolyte became slightly caustic at would over time corrode the rubber plug and the conductors leading out of the capacitor thereby causing a leak and the resulting damage from corrosive liquid leaching out onto the circuit board. Now I heard the story handed down from service people in the Sony corporation. Sony had one hell of a lot of problems with surface mounted electrolytic capacitors in their early camcorders as did Canon and many other companies. now if there are grammar or spelling mistakes in this I apologize as I'm using voice dictation and sometimes Google doesn't get it right. LOL
Hey I have 3 of this mini tvs, and the picture on all 3 unit don’t have the lines this one is showing!
Maybe recap the whole unit because that tv still have a problem
The owner had a limit on what he wanted to spend.
That picture looks as bad as the TV400 I bought in 1988. The other thing it would rally drain batteries, like 4 AAs would last just over an hour. The later Casios that used TFT screens were better of course.
Yep that's crap!.
It makes the sinclair pocket tv look usable lol.
In the mid-80s I worked for the company that did the warranty service for the Sinclair TVs. There was a lot of returns because they were unreliable(like many Sinclair products). And the special flat battery(made by Polaroid) it used was quite expensive and didn't last long.
@@michaelturner4457 Yep he had a habit of skimping and using reject parts.
The only thing i thought was quite reliable was the zx81 computer and zx spectrum (later versions).
But he cheaped out on the memory chips lol.
The black night watches were really bad.
R.i.p clive sinclair.
Sinclair. Almost forgot about those. A friend got one for xmas way back. We were all jealous. It didn't work long.
I wonder what voltage was missing or low then
High ripple causing the vertical scan drive IC to not start on the LCD.
@@12voltvids ah I see
I saw a flash on the LCD screen when i ran my finger over one of the drive chips (not on camera as i was showing the scope at the time.)
I have a few casio lcd tv,s and one citizen all have awful pictures the lcd,s back then were not great and quite often even when we used rf in the uk it was often not great getting decent reception ,my little sony watchmen crt black and white is quite decent for what it is i have an rf to scart adaptor in the uk so i connect things up to the ones that have rf input .I always thought the seiko tv watches seemed cool back in the day though they were us only devices and no doubt terrible to watch and use .
Before TFT displays they were pretty bad.
I remember seeing the Seiko tv watch once. It was black and white and had a pretty poor picture. You had to carry a seperate tuner / battery pack and to watch it a mini plug was inserted into the side of the watch. That made the watch not even sweat proof. All for about 400.00!
WHY DID YOU GET MAD 😠 AT THE END OF THIS VIDEO I TYPE IN ALL CAPS BECAUSE OF MY BAD EYESIGHT
👍
That screen is something like 80x60 pixels.
It's pretty low resolution.
There was a VHF channel 1?
There was at one time yes.
Why just buy a new broad
No parts available.
Battery eater
What eats the batteries is the backlight lamp