@@mistertentpole Sorry for the very late reply, the TV works great and I've wired in a composite and audio connector into a space in the battery compartment. I'd also like to put a raspberry pi into the battery compartment too! :)
When I modified mine, I removed the tuner module as there is nothing for it to tune into. Reduces power and weight. Tip: the battery compartment is a handy place to put a small computer like the Raspberry Pi.
haha awesome sauce! 3:47 "All over the place, all over the place what are you doing??" this is like perfect synchro to the context! Excellent video dude
I'm busy building something pretty special out of one of these TV's, they were available as 'free gifts' when you signed up for catalogues or got an insurance quote or something. They're pretty crap, but with a Composite video in I can do quite a lot (we don't have terrestrial analogue TV any more).
Where do you find diagrams for old CRT TVs? I have a 1980s monochrome KTV that only accepts UHF/VHF input that is directly soldered from the knobs to the motherboard. Would like to add composite to it so I can make a fake dummy terminal with a raspberry pi on the inside but I am new to CRT internals. Does adding composite depend on a specific video channel on the board?
hi, I have an old irradio b/w tv. The chip is the same. It seems easy, located the pin 5 I can connect the video out positive directly to the pin 5, after cutting the line that from the pin 5 is going to the circuit. the result is just a screen with a lot of orizzontal lines. If I restore the line with the positive connected to pin 5 I see the signal but very noised. What I am doing wrong? tx
Maybe, same procedure. You need to locate the chip that decodes the incoming video, and find out if there is a Y/C decoder for NTSC video or a combiner for component before the inputs.
Very cool. I found a TV just like that for $2 at a thrift shop. My plan is to build it into a computer with a Raspberry Pi in the style of the luggables of the past (Osborne, Kaypro, Compaq).
I tried this today with an Emerson - Onboard IC is an LA7530N with video out on pin 16. I tried pulling the leg and tacking a lead directly to the pad. I was able to get a steady b&w image from a Luma source, but trying composite video results in just a mess. I did not terminate it with 75ohm, just straight CVBS into the video out pad - is this the issue?
Are there more detailed instructions written somewhere? I really appreciate the vid, but it's tough to follow exactly what you're doing and I'm worried about botching it.
mistertentpole I have a 7" digital TV which doesn't has composite inputs, can I do this to it? I want to connect my PS3 to it. I bought a RF Modulator but for some reason my tv does not process the signal input
This might be a little away from what you're doing here, but I think it's in teh right track. I'm looking to use a B&W TV as a monitor for an arcade game, like space invaders era. The boards put out a single video line, which I believe is effectively a single colour 'composite' type signal (obviously composite isn't the right word with only one colour/no colour, but you know what I mean). Does this sound correct? a B&W video feed would technically be able to be connected to a B&W TV in the same manner as you've done here, do you think?
Great video! I have seen another tutorial where the guy adds video in to an old Sony Watchman CRT; same procedure. He removed the IC entirely to cut out on interference. My question, since you say cut the trace and loosen the chip, is this chip only for processing the incoming RF? Since RF broadcasting is all but gone, these chips are useless for our modern needs? Thanks in advance.
These 5" tellies use a single-chip monochrome TV chip plus a tuner. The tuner feeds baseband video to the chip. You can't remove the TV chip. It is soldered in, so you can't "loosen" it at all.
Well... I found the answer. The composite signal is also fed into the chip at pin 6 which is the input for the sync circuitry. Kind of weird that this is done externally in the original design. I mean, video out from the chip is fed back into the chip at another pin. Why not deal with this internally inside the chip? Could the reason be to easily enable a composite input on more expensive models of the same TV?
That's exactly why, the less common, "higher end" (lol) versions of this toob had a composite in.... it's crazy to me that the cost of an rca jack and wire and solder was enough to outweigh the increased consumer appeal that the composite input would have brought with it....
@@testcardsandmore1231Thank you for explaining this part of it! I was seriously confused even with the AN5151 example circuit and pinout in front of me and somehow forgot 6 was sync separator input.
I'm modding a 1988 portable TV to have composite video, but I've run into problems. It has a AN5151N with same pinout as KA2915, so I cut the trace between the 5th pin and the board and soldered a wire between the board and the input. Same for audio on 11th pin. I get a distorted image and static sound. Some sources said I shouldn't cut the trace while others suggest adding some passive componentes to fix the image. Did you connect the inputs and it worked right away? Thanks.
@@ryanbareither89 Resistors didn't help, but I finally solved the problem. Connected a 0.1 uF capacitor in series with Video signal (+) and readjusted image on back panel. The interference is completely gone. A friend suggested I use a highter capacitor like 1 to 10 uF but I had none (always readjust image settings on back).
So I have a old tv that I love, is there anyway I could convert it from the av ports to hdmi so I can connect by blueray player? I don't want to get the box that converts it.
Joaquin Reyes The trouble here is that the signals are not compatible. Without additional electronics, no you cannot directly modify analog tv to include a working HDMI connection.
I could not find my TV's schematic anywhere on the site, and the only things that did have it charged money. My TV is a Samsung TB-1210. I would fool with it some more, but I just blew a fuse fooling around with an RCA cable, poking it around.
He didn't find the TV schematics either, he found the datasheet for the chip inside the TV that produced the video signal. Maybe if you can identify that chip inside your TV you can do the same?
Hey - Nice work! I have a Sony Solid Sate (TV9-90UB) B&W TV and was looking to do exactly the same operation. But I don't have the technical understanding to figure out where I need to solder in the video input wire. I don't suppose you could take a look over the electrical diagram and PCB below and help me out? Any clues you can provide would be a big help. i.imgur.com/4MfaJYW.png - Diagram i.imgur.com/PvbjEaQ.jpg - PCB in the TV Cheers!
A 9 year old tutorial but was perfect for my needs, thanks. Saving TVs from landfill and making them live once again :)
Hey that was kind of you to say! When you get done, please reply again with your results!
@@mistertentpole Sorry for the very late reply, the TV works great and I've wired in a composite and audio connector into a space in the battery compartment. I'd also like to put a raspberry pi into the battery compartment too! :)
When I modified mine, I removed the tuner module as there is nothing for it to tune into. Reduces power and weight.
Tip: the battery compartment is a handy place to put a small computer like the Raspberry Pi.
Good idea. How did you power the raspberry pi? with a second cable?
@@nickbex I added a Rasperry Pi Zero to my build and I found a 12V source on the board then added a step down to 5V board.
Well i use the battery compartment to put a power supply in it for storage.
Just found the TV from my childhood that I thought had been thrown away over a decade ago, but this is mod is a bit over my head to do
haha awesome sauce! 3:47 "All over the place, all over the place what are you doing??" this is like perfect synchro to the context! Excellent video dude
Nice mod! I've been thinking about doing the same thing to an old TV for a while now.
I'm busy building something pretty special out of one of these TV's, they were available as 'free gifts' when you signed up for catalogues or got an insurance quote or something. They're pretty crap, but with a Composite video in I can do quite a lot (we don't have terrestrial analogue TV any more).
Where do you find diagrams for old CRT TVs? I have a 1980s monochrome KTV that only accepts UHF/VHF input that is directly soldered from the knobs to the motherboard. Would like to add composite to it so I can make a fake dummy terminal with a raspberry pi on the inside but I am new to CRT internals. Does adding composite depend on a specific video channel on the board?
It sucks that this is 3 years old as im having the same problem but my plan is to poke around the board and see what I can do
hi, I have an old irradio b/w tv. The chip is the same. It seems easy, located the pin 5 I can connect the video out positive directly to the pin 5, after cutting the line that from the pin 5 is going to the circuit. the result is just a screen with a lot of orizzontal lines. If I restore the line with the positive connected to pin 5 I see the signal but very noised. What I am doing wrong? tx
I try in the next days on a Colour version.. can you solve your issue?
Too funny, that's the exact TV I just picked up.
they seem to be really common and made under different brand names
can i add Component or S-video to an 1994 trinitron that only has composite and RF inputs¿
Maybe, same procedure. You need to locate the chip that decodes the incoming video, and find out if there is a Y/C decoder for NTSC video or a combiner for component before the inputs.
Im going to do this. I have a small TV one of my aunts friends donated to me.
Very cool. I found a TV just like that for $2 at a thrift shop. My plan is to build it into a computer with a Raspberry Pi in the style of the luggables of the past (Osborne, Kaypro, Compaq).
I tried this today with an Emerson - Onboard IC is an LA7530N with video out on pin 16. I tried pulling the leg and tacking a lead directly to the pad. I was able to get a steady b&w image from a Luma source, but trying composite video results in just a mess. I did not terminate it with 75ohm, just straight CVBS into the video out pad - is this the issue?
Hindi me bolo horizontal ad vertical problem
I have already repaired my problem, i just added resistor to + and composit in.
Is this possible with most mini black and whites, like the Sony watchman fed-10a? Thx
Try opening it up and finding the central IC. Then follow the same steps as in video. Find the datasheet and video and audio signals.
I would like to do the same but I own an Audiologic TV -FM/GO Radio and the model number is unknown, can't find the board schematics's...
I am trying to repair one. video ok.There is no audio for radio or tv. loudspeaker is ok. Any ideas?
Two things.
1) this video is rock’n’roll
2) see 1
Are there more detailed instructions written somewhere? I really appreciate the vid, but it's tough to follow exactly what you're doing and I'm worried about botching it.
Hello. I did this in my tv. Audio worked, but I did not get image after cut the ci leg. I saw image with snow before cut. Any idea?
mistertentpole I have a 7" digital TV which doesn't has composite inputs, can I do this to it? I want to connect my PS3 to it. I bought a RF Modulator but for some reason my tv does not process the signal input
why indicates Video output, it should not be the video input is confusing not knowing much. The datasheet of mine says Video Input 🤔🤔
This might be a little away from what you're doing here, but I think it's in teh right track. I'm looking to use a B&W TV as a monitor for an arcade game, like space invaders era. The boards put out a single video line, which I believe is effectively a single colour 'composite' type signal (obviously composite isn't the right word with only one colour/no colour, but you know what I mean). Does this sound correct? a B&W video feed would technically be able to be connected to a B&W TV in the same manner as you've done here, do you think?
Great video! I have seen another tutorial where the guy adds video in to an old Sony Watchman CRT; same procedure. He removed the IC entirely to cut out on interference. My question, since you say cut the trace and loosen the chip, is this chip only for processing the incoming RF? Since RF broadcasting is all but gone, these chips are useless for our modern needs? Thanks in advance.
These 5" tellies use a single-chip monochrome TV chip plus a tuner. The tuner feeds baseband video to the chip. You can't remove the TV chip. It is soldered in, so you can't "loosen" it at all.
i don't get it. How does the TV manage to sync properly if you're just feeding composite video after the KA2915 chip?
Well... I found the answer. The composite signal is also fed into the chip at pin 6 which is the input for the sync circuitry. Kind of weird that this is done externally in the original design. I mean, video out from the chip is fed back into the chip at another pin. Why not deal with this internally inside the chip? Could the reason be to easily enable a composite input on more expensive models of the same TV?
That's exactly why, the less common, "higher end" (lol) versions of this toob had a composite in.... it's crazy to me that the cost of an rca jack and wire and solder was enough to outweigh the increased consumer appeal that the composite input would have brought with it....
@@testcardsandmore1231Thank you for explaining this part of it! I was seriously confused even with the AN5151 example circuit and pinout in front of me and somehow forgot 6 was sync separator input.
@@testcardsandmore1231 if i Connect pin 5 and 6 static dissapear but It doesnt work , no imagen
Is there a way to make it color
i have moded my tv, but it has stripes over screen-horizontal.
What can i do?
i think correct is to connect it in parallel - gnd and composit in?
I'm modding a 1988 portable TV to have composite video, but I've run into problems. It has a AN5151N with same pinout as KA2915, so I cut the trace between the 5th pin and the board and soldered a wire between the board and the input. Same for audio on 11th pin. I get a distorted image and static sound. Some sources said I shouldn't cut the trace while others suggest adding some passive componentes to fix the image. Did you connect the inputs and it worked right away? Thanks.
Did you connect to ground? Try a 75 Ohm resistor between the video signal and ground.
@@ryanbareither89 Resistors didn't help, but I finally solved the problem. Connected a 0.1 uF capacitor in series with Video signal (+) and readjusted image on back panel. The interference is completely gone. A friend suggested I use a highter capacitor like 1 to 10 uF but I had none (always readjust image settings on back).
@@dimitrypilin3098 great! That would've been my next suggestion, a capacitor. I'm glad you solved it
Lo hice con mi TV pero no funcionó, alguna respuesta?
So i just connect 75ohm resistor in series?
Tnx for response.
I have an old 1975 RCA portable BW TV. Is it possible to convert the electronics to accept digital? And if so, do you do this?
Possible to have a tutorial on this? Any further documentation? PLEASE! Anyone?
hackaday.io/project/29533-baseband-video-on-old-tv has a typical circuit diagram.
sucking down cigarettes and thinking the melted plastic is gonna hurt ya... haha well nice work on the hack
So I have a old tv that I love, is there anyway I could convert it from the av ports to hdmi so I can connect by blueray player? I don't want to get the box that converts it.
Joaquin Reyes The trouble here is that the signals are not compatible. Without additional electronics, no you cannot directly modify analog tv to include a working HDMI connection.
+Joaquin Reyes
Older Blu Ray players had standard AV ports on them. You could try to find one of those.
Thanks for the helpful information!!!
Joaquin Reyes
No problem. I wasn't sure if it'd be all that helpful after a whole year, but you never know!
I could not find my TV's schematic anywhere on the site, and the only things that did have it charged money. My TV is a Samsung TB-1210. I would fool with it some more, but I just blew a fuse fooling around with an RCA cable, poking it around.
He didn't find the TV schematics either, he found the datasheet for the chip inside the TV that produced the video signal. Maybe if you can identify that chip inside your TV you can do the same?
Mine is out of sync... help?
Adjust the pots on the back to stabilize the image. Also add 0.1 or 1 uF capacitor in series with thje video signal (+).
yes that would be right
I was so totally going to say you need a 75 ohm terminator
This is "Atari 2600 hip hop"soundtrack
Hey - Nice work!
I have a Sony Solid Sate (TV9-90UB) B&W TV and was looking to do exactly the same operation. But I don't have the technical understanding to figure out where I need to solder in the video input wire. I don't suppose you could take a look over the electrical diagram and PCB below and help me out? Any clues you can provide would be a big help.
i.imgur.com/4MfaJYW.png - Diagram
i.imgur.com/PvbjEaQ.jpg - PCB in the TV
Cheers!
You will need to take a different route. You will need to use an RF convertor and a balut to connect it to the antenna.
I have a question, do you have an email address?
If it's not personal, would you post your question such that others with this same question may benefit?