REALLY AWESOME DUDE YOU ROCK MAN THE WAY YOU DESCRIBE THINGS AND SHOW THEM TO THE CAMERA ARE QUITE SOMETHING ,,I MUST TELL YOU I LEARNED A LOT ABOUTR LCD PANELS WITH THIS VIDEO......KEEP IT UP ....
Those litle dots on the plexiglass reflector are printed with High Definition UV flatbet inkjet printer plotter, everything else is not etched, but engraved or cuted with lazer
Very good video! Very detailed and informative, just like a good training manual! Thanks so much for taking the time to make this video! You've helped me in my troubleshooting a lot!
I wish they would make the LCD panels thicker & stronger so they wouldn’t crack so easy! I don’t know why the factories don’t fit a thick glass or perspex on the front as a screen protector like the really old roundie & rectangular CRT’s.
With CRTs, the thick glass was mandatory since there's a high vacuum in it, which means the atmospheric pressure introduces 10N force, or 1kg to each sq-cm of the surface of the tube. For a large tube, that could mean literally TONS pushing it from every direction constantly, from the factory until it breaks. That's why they implode so violently if they break. With LCDs, there's no need to make the glass thicker than necessary. They could make it twice as thick as they do, but it would cost more to manufacture, so they don't. And I'm not sure, but maybe a thicker glass might be disadvantageous to the quality because the two polarizers would be further away from each other. They do make rugged / vandal proof LCDs where there's a thick tempered glass on the front of the screen, but it's not the part of the actual LCD panel. And they sell them for quite a substantial premium. Here's an example from 12+ years ago: www.techeblog.com/video-asus-lcd-monitor-withstands-crossbow-shots/
As I got LCD monitors from year 2003 to year 2012, their LCD was so tough. Got some from junkshops. But 2013 and later, they were not that tough. The oldest LCD monitor I got was IBM Thinkcentre L150 monitor, I only resoldered some cold solder and now it is well. It only need its polarizer film to be replaced.
Hi Great video, really explains alot, would a lot of tiny white dots over a screen mean that the t con board no longer has control over the pixels and therefore that the screen is junk?
That is an unusual looking T-con board. Thanks for going over the main board. i cannot believe how they have shrunk a whole TV (and I remember working on the old CRT TVS) onto such a small board. I do know that it is low voltage with SMD chips on it. I can't solder SMDs, and have been loosing jobs because of it. Next time I get a job like that, I am going to use ChipQuick and see if it is any better. Why does this LCD TV not have any holes to see if the back light is working? I opened up a Samsung LCD TV with the screen not lighting up and it had no back light LCDs. It looked like it had nothing. Samsong would not tell me anything because I am not an authorized dealer. Is there a new generation of LCD TVs that are not using back lights? What are they using and how do they work?
I don't know if this will be helpful, but to my knowledge there is no LCD that doesn't require a light source as LCDs don't produce any light they only impede or almost totally block light. Organic LED (OLED) is the next generation that doesn't use LCD at all. OLED is the light source.
Hi......You didn't mention a power board? what about the power to run the set? Otherwise very informative! and your usual excellent demonstration. Ray H. ( From the U.K. )
This was a *very* informative video and very cool!! Your knowledge and skills are amazing! I appreciate your videos immensely! I was going to suggest to use the florescent light as mood lighting for your fish! But the wife might appreciate them more! :)
JacksJunkDotCom It's a reef tank, with live coral, which requires the strong lighting as they use photosynthesis to produce energy, similar to how a plant works, except coral are animals, not plants. They use UV light, but they also eat food, and in some cases they will eat fish if they get a chance. You can see my aquarium video on my channel.
I doubt you'll see this, but is there a way to replace one of those IC ribbons if you were to get a donar TV. I ask because one of the ribbons burned on my TV and nothing else is wrong but that ribbon.
Tom Van der ven This particular unit, because it is a small screen only has 2 fluorescent tubes, at the top and bottom. larger LCD screens will have several tubes running across the screen.Then there is LED backlit screens that will have either a series of LED strips running across the back, or will be edge lit like this. But yes, most LCD TVs are constructed in this way. I have a tear down of a 50" LED with a broken screen as well as a plasma if you look for it.
Tom Van der ven This set used an external power supply. Most have the inverter inside. Check out my other repair videos on LCD sets and you will see a couple of different Samsungs, a Sharp, LG, and a Samsung Plasma. They are all totally different.
Tom Van der ven Most of the small ones have the tcon circuits as part of the panel, and have a single circuit board like this. Take a look at the "Craig" tv service video. It is also a small one,a nd looks very similar inside. There is a limit to the length of the LVDS cable length between the board and the display. LVDS stands for low voltage differential signaling. Essentially it is a twisted pair, like Ethernet, where 1 wire goes positive, and the other negative, and they reverse the polarity to encode the bits 1 or 0, and is done at a very low voltage, as the lower the voltage the faster they can switch polarity. So this does limit the length to a few feet of wire.
My 55" plasma, think it was Panasonic & know was pricey, radiated so much heat the overpowered A/C couldn't keep up even in the coldest months... Ridiculous.
thank-you for this video yes am a bit of a herd I always wanted to know where the lamps in the TV were cause I always thought they were in the back haha but am a girl and just learning 😀👍
Ya realize one has learned all about flat panel TV repairs when you can finish all of your sentences before you do...lol great vid on how to reclaim ccfl lamps from a piece of shite TV, thanks 12volts, keep on keeping on!
I'm trying to use an old 46" LED LCD light box for making videos,. but after a period of being on (no signal) it goes in to sleep mode. I'd like to prevent it from doing that. Still trying.
REALLY AWESOME DUDE YOU ROCK MAN THE WAY YOU DESCRIBE THINGS AND SHOW THEM TO THE CAMERA ARE QUITE SOMETHING ,,I MUST TELL YOU I LEARNED A LOT ABOUTR LCD PANELS WITH THIS VIDEO......KEEP IT UP ....
I remember the days when you could create a rainbow by moving a strong magnet over a CRT.
The (internet) world needs more people like YOU!!
as an electronic engineer i find the technology in these tv,s simple yet amazing
Great work dude...! America is great...!
Those litle dots on the plexiglass reflector are printed with High Definition UV flatbet inkjet printer plotter, everything else is not etched, but engraved or cuted with lazer
Very good video! Very detailed and informative, just like a good training manual! Thanks so much for taking the time to make this video! You've helped me in my troubleshooting a lot!
Love your TV vids, I'd love to see more
As they say on the tonight show, more to come.
I wish they would make the LCD panels thicker & stronger so they wouldn’t crack so easy! I don’t know why the factories don’t fit a thick glass or perspex on the front as a screen protector like the really old roundie & rectangular CRT’s.
With CRTs, the thick glass was mandatory since there's a high vacuum in it, which means the atmospheric pressure introduces 10N force, or 1kg to each sq-cm of the surface of the tube. For a large tube, that could mean literally TONS pushing it from every direction constantly, from the factory until it breaks. That's why they implode so violently if they break. With LCDs, there's no need to make the glass thicker than necessary. They could make it twice as thick as they do, but it would cost more to manufacture, so they don't. And I'm not sure, but maybe a thicker glass might be disadvantageous to the quality because the two polarizers would be further away from each other. They do make rugged / vandal proof LCDs where there's a thick tempered glass on the front of the screen, but it's not the part of the actual LCD panel. And they sell them for quite a substantial premium. Here's an example from 12+ years ago: www.techeblog.com/video-asus-lcd-monitor-withstands-crossbow-shots/
As I got LCD monitors from year 2003 to year 2012, their LCD was so tough. Got some from junkshops. But 2013 and later, they were not that tough. The oldest LCD monitor I got was IBM Thinkcentre L150 monitor, I only resoldered some cold solder and now it is well. It only need its polarizer film to be replaced.
Hi Great video, really explains alot, would a lot of tiny white dots over a screen mean that the t con board no longer has control over the pixels and therefore that the screen is junk?
How is the NTSC170A signal able to be compatible with the old CRTs and modern day Plasmas and LCDs?
Modern tvs have a/d converters to digitize the analog signal
That is an unusual looking T-con board. Thanks for going over the main board. i cannot believe how they have shrunk a whole TV (and I remember working on the old CRT TVS) onto such a small board. I do know that it is low voltage with SMD chips on it. I can't solder SMDs, and have been loosing jobs because of it. Next time I get a job like that, I am going to use ChipQuick and see if it is any better. Why does this LCD TV not have any holes to see if the back light is working? I opened up a Samsung LCD TV with the screen not lighting up and it had no back light LCDs. It looked like it had nothing. Samsong would not tell me anything because I am not an authorized dealer. Is there a new generation of LCD TVs that are not using back lights? What are they using and how do they work?
I don't know if this will be helpful, but to my knowledge there is no LCD that doesn't require a light source as LCDs don't produce any light they only impede or almost totally block light. Organic LED (OLED) is the next generation that doesn't use LCD at all. OLED is the light source.
Did you try to order a new LCD through Shop Jimmy. I find that they are always out of stock.
Only thing I have ordered was a couple of buffer boards and that was years ago. They are just recyclers. They pull parts off old tvs.
So all the kings horses and all the kings men can't put one of these LCD panels together again?
This shit isn't worth fixing.
the best video obout tv sreen .. I learned a lot obout the panel fonctionality .
IS IT WORTH REPLACING THE LCD LED SCREEN. I HAVE MINE TAKEN APART AND WOULD REPLACE IF ITS WORTH IT
Fascinating, loved this vid!
Hi......You didn't mention a power board? what about the power to run the set? Otherwise very informative! and your usual excellent demonstration.
Ray H. ( From the U.K. )
This was a *very* informative video and very cool!! Your knowledge and skills are amazing! I appreciate your videos immensely! I was going to suggest to use the florescent light as mood lighting for your fish! But the wife might appreciate them more! :)
JacksJunkDotCom My fish have lots of light. 2x 150watt halide lights, plus a 96 watt actinic lamp.
12voltvids Holy cow, hope your poor fish have Sun glasses!! :)
JacksJunkDotCom It's a reef tank, with live coral, which requires the strong lighting as they use photosynthesis to produce energy, similar to how a plant works, except coral are animals, not plants. They use UV light, but they also eat food, and in some cases they will eat fish if they get a chance. You can see my aquarium video on my channel.
oh I can see my next project is gonna be a light box build for a poster. Very cool video!
Vintage Electronics Geek
Great vid thank you
Cool!very good information ,👍🤝
I doubt you'll see this, but is there a way to replace one of those IC ribbons if you were to get a donar TV. I ask because one of the ribbons burned on my TV and nothing else is wrong but that ribbon.
Not the ones that are bonded to the panel.
@@12voltvids so in short, once an IC on the panel is damaged there's no repairing the panel?
@@henryisolation9998 that's right. When a drive ic fails on panel the panel is toast.
Hi there. My led tv has a broken flexible ribbon thing that is connected from the TCON to the glass panel. Can that be fixed?
You need a new flexable pcb.
I wonder if i could disassemble a panel to clear moisture out of it... Ideas?
Moisture should be driven out from the backlight heat.
@@12voltvids i don't think that would happen with LEDs, especially considering it was IPA that seeped into the panel.
@@lukedavis436 ipa probably has already damaged the polarizing filters.
@@12voltvids welp new screen time for me then
learned a whole lot, thanks for sharing
do you know if every lcd tv looks like this?
Tom Van der ven This particular unit, because it is a small screen only has 2 fluorescent tubes, at the top and bottom.
larger LCD screens will have several tubes running across the screen.Then there is LED backlit screens that will have either a series of LED strips running across the back, or will be edge lit like this. But yes, most LCD TVs are constructed in this way. I have a tear down of a 50" LED with a broken screen as well as a plasma if you look for it.
i mean, the tv like the power supply and stuff
Tom Van der ven This set used an external power supply. Most have the inverter inside. Check out my other repair videos on LCD sets and you will see a couple of different Samsungs, a Sharp, LG, and a Samsung Plasma. They are all totally different.
i wanna make a flat tv with only the lcd screen in it and the boards on a external device. do you think this is possible?
Tom Van der ven Most of the small ones have the tcon circuits as part of the panel, and have a single circuit board like this. Take a look at the "Craig" tv service video. It is also a small one,a nd looks very similar inside.
There is a limit to the length of the LVDS cable length between the board and the display. LVDS stands for low voltage differential signaling. Essentially it is a twisted pair, like Ethernet, where 1 wire goes positive, and the other negative, and they reverse the polarity to encode the bits 1 or 0, and is done at a very low voltage, as the lower the voltage the faster they can switch polarity. So this does limit the length to a few feet of wire.
if have another crystal screen but its other brands example LG broken change with samsung but its same size 42" it can or not
those lights would look cool under a car. like bottom of car door.
so 1 connector per ccfl lamp, so 4 connectors mean 4 lamps.
My 55" plasma, think it was Panasonic & know was pricey, radiated so much heat the overpowered A/C couldn't keep up even in the coldest months... Ridiculous.
With the way the cracks look it was struck by lightning
thank-you for this video yes am a bit of a herd I always wanted to know where the lamps in the TV were cause I always thought they were in the back haha but am a girl and just learning 😀👍
Ya realize one has learned all about flat panel TV repairs when you can finish all of your sentences before you do...lol great vid on how to reclaim ccfl lamps from a piece of shite TV, thanks 12volts, keep on keeping on!
How to repair it.
and you have just gained a new subscriber 😜
I'm trying to use an old 46" LED LCD light box for making videos,. but after a period of being on (no signal) it goes in to sleep mode. I'd like to prevent it from doing that. Still trying.
its so sad how thay build it
not holl to it
mrsi beko twist
Good news! The LCD panel "only" costs around $90.00
(lol)
Another drunken guy
Talk to much
Boohoo