TV RGB mod thread

[realm]

This is what the set looks like when I first power it on and nothing connected
https://drive.google.com/file/d/1b3It78 ... sp=sharing

This is the set after I press the OSD menu button
https://drive.google.com/file/d/1BjwRwF ... sp=sharing

This is the set when I turn on the blanking switch
https://drive.google.com/file/d/1vuU-EP ... sp=sharing

Clearly something isn't right with the way I had that setup. I appreciate any insight into what I have wrong

Thanks

[DotMatrixMoe]

This is what the set looks like when I first power it on and nothing connected
https://drive.google.com/file/d/1b3It78 ... sp=sharing

This is the set after I press the OSD menu button
https://drive.google.com/file/d/1BjwRwF ... sp=sharing

This is the set when I turn on the blanking switch
https://drive.google.com/file/d/1vuU-EP ... sp=sharing

Clearly something isn't right with the way I had that setup. I appreciate any insight into what I have wrong

Thanks

Syntax is definitely better at diagnosing this than me, but if all the other inputs look like this too... I think it's a horizontal problem. I always take a picture of the entire motherboard stock to make sure I plugged in absolutely everything in and no part was altered! Make sure everything is plugged in and there are no shorts with your mod. That's as far as my knowledge goes.

[realm]

This is what the set looks like when I first power it on and nothing connected
https://drive.google.com/file/d/1b3It78 ... sp=sharing

This is the set after I press the OSD menu button
https://drive.google.com/file/d/1BjwRwF ... sp=sharing

This is the set when I turn on the blanking switch
https://drive.google.com/file/d/1vuU-EP ... sp=sharing

Clearly something isn't right with the way I had that setup. I appreciate any insight into what I have wrong

Thanks

Syntax is definitely better at diagnosing this than me, but if all the other inputs look like this too... I think it's a horizontal problem. I always take a picture of the entire motherboard stock to make sure I plugged in absolutely everything in and no part was altered! Make sure everything is plugged in and there are no shorts with your mod. That's as far as my knowledge goes.

Ok, thanks for the suggestions. I hope someone with some more experience can help out.
My plan is to return the set back to stock and make sure it functions properly, then reattempt the mod with the circuit on a breadboard.
I'll post up here again once i return the set back to stock and check that it functions as it did before.

[spikespiegel]

I have rgb modded a Panasonic TC-29FX32L, but as you can see in the following videos, I can only get the V-Sync to work:
https://drive.google.com/file/d/1puSl3y ... sp=sharing

There's no hardware problem, the mod is just fine. By the way, the service manual says the RGB is analog.

Maybe it's disabled by software?

Service Manual:
https://drive.google.com/file/d/1noXKmZ ... sp=sharing

I'm sorry for the idiom, the service manual is in Portuguese and I couldn't find it in English anywhere.


Should I enable it by messing with the memory editor? Or by adjusting the service menu options? Is there any guide teaching how?

[MarkOZLAD]

I have rgb modded a Panasonic TC-29FX32L, but as you can see in the following videos, I can only get the V-Sync to work:
https://drive.google.com/file/d/1puSl3y ... sp=sharing

There's no hardware problem, the mod is just fine. By the way, the service manual says the RGB is analog.

Maybe it's disabled by software?

Service Manual:
https://drive.google.com/file/d/1noXKmZ ... sp=sharing

I'm sorry for the idiom, the service manual is in Portuguese and I couldn't find it in English anywhere.


Should I enable it by messing with the memory editor? Or by adjusting the service menu options? Is there any guide teaching how?

Please confirm that you have a voltage going to the blanking pin.

[Daripa]

Goodday, got a ctv1493 opened her up last night and saw its got a unsoldered scart connector. I hooked everything up but it's only displaying composite. Should I trace the pins and see where blanking is going? There is 1v on it and 900mv if I switch to av. I put 5v on fbk at no avail using composite as sync, should I use the scarts sync pin? . Any help or advice would be appreciated.

[spikespiegel]

I have rgb modded a Panasonic TC-29FX32L, but as you can see in the following videos, I can only get the V-Sync to work:
https://drive.google.com/file/d/1puSl3y ... sp=sharing

There's no hardware problem, the mod is just fine. By the way, the service manual says the RGB is analog.

Maybe it's disabled by software?

Service Manual:
https://drive.google.com/file/d/1noXKmZ ... sp=sharing

I'm sorry for the idiom, the service manual is in Portuguese and I couldn't find it in English anywhere.


Should I enable it by messing with the memory editor? Or by adjusting the service menu options? Is there any guide teaching how?

Please confirm that you have a voltage going to the blanking pin.

I do. 5 volts coming from a power supply pin of the IC, I measured it.

[Daripa]

I have rgb modded a Panasonic TC-29FX32L, but as you can see in the following videos, I can only get the V-Sync to work:
https://drive.google.com/file/d/1puSl3y ... sp=sharing

There's no hardware problem, the mod is just fine. By the way, the service manual says the RGB is analog.

Maybe it's disabled by software?

Service Manual:
https://drive.google.com/file/d/1noXKmZ ... sp=sharing

I'm sorry for the idiom, the service manual is in Portuguese and I couldn't find it in English anywhere.


Should I enable it by messing with the memory editor? Or by adjusting the service menu options? Is there any guide teaching how?

I don't have much experience in electronics but did you check all the pins to see if any are shorted to ground.
Just removed three jumpers on my set shorting RGB to ground and my 5v was missing a jumper to jungle so yeah. Do you have a cap in the blanking line I see I've got one, no idea what it's for?

[MarkOZLAD]

Have you measured the voltage at the blanking pin?

[spikespiegel]

Have you measured the voltage at the blanking pin?

Should I do this in series with the 5v or with the ground?

[spikespiegel]

I measured both.

0.21 volts in the blanking in series with the ground.
0.45 volts in the blanking in series with the 5v supply.

What is this for?

[realm]

Ok so my first attempt to mod my RCA F19430 Daewoo Chassis CN-001N was a failure. I have removed the mod and the set functions normally. Is it possible this set has digital RGB and cannot be modded? How can I tell? I followed the mod exactly and had issues. Could it be that I chose the wrong inline resistors? I used the 0.7V p-p chart to select my resistors. Should I have used the 0.5V p-p chart to choose my resistors? Here's a link to the service manual for my chassis https://www.manualslib.com/manual/47092 ... =20#manual

I need some help on where to go from here. I have already built the RGB mux circuit on a breadboard I'm just not sure which resistors to use.
Thanks

[MarkOZLAD]

I measured both.

0.21 volts in the blanking in series with the ground.
0.45 volts in the blanking in series with the 5v supply.

What is this for?

With your mod turned

With multimeter in volts DC

Take the red probe of your multimeter and touch it to the blanking pin and take the black probe and touch it to a ground point.

For the RGB to work I would expect the voltage reading to be somewhere around 1.5 to 5V.

[MarkOZLAD]

Ok so my first attempt to mod my RCA F19430 Daewoo Chassis CN-001N was a failure. I have removed the mod and the set functions normally. Is it possible this set has digital RGB and cannot be modded? How can I tell? I followed the mod exactly and had issues. Could it be that I chose the wrong inline resistors? I used the 0.7V p-p chart to select my resistors. Should I have used the 0.5V p-p chart to choose my resistors? Here's a link to the service manual for my chassis https://www.manualslib.com/manual/47092 ... =20#manual

I need some help on where to go from here. I have already built the RGB mux circuit on a breadboard I'm just not sure which resistors to use.
Thanks

This set has a jungle that is a clone of an LA76810 Sanyo jungle.

I have only had heartache with those jungles.

They usually show a picture once RGB modded but the picture has poor contrast/black levels.

Suggest getting another set.

[realm]

Ok so my first attempt to mod my RCA F19430 Daewoo Chassis CN-001N was a failure. I have removed the mod and the set functions normally. Is it possible this set has digital RGB and cannot be modded? How can I tell? I followed the mod exactly and had issues. Could it be that I chose the wrong inline resistors? I used the 0.7V p-p chart to select my resistors. Should I have used the 0.5V p-p chart to choose my resistors? Here's a link to the service manual for my chassis https://www.manualslib.com/manual/47092 ... =20#manual

I need some help on where to go from here. I have already built the RGB mux circuit on a breadboard I'm just not sure which resistors to use.
Thanks

This set has a jungle that is a clone of an LA76810 Sanyo jungle.

I have only had heartache with those jungles.

They usually show a picture once RGB modded but the picture has poor contrast/black levels.

Suggest getting another set.

Thanks for saving me the headache. I have two more sets one is a Samsung TXK2766 and a Sharp 19L-M100S.
Are either of those worth my time? I have the Sharp service manual, heres a link https://diagramas.diagramasde.com/otros ... -%2080.pdf

[spikespiegel]

I measured both.

0.21 volts in the blanking in series with the ground.
0.45 volts in the blanking in series with the 5v supply.

What is this for?

With your mod turned

With multimeter in volts DC

Take the red probe of your multimeter and touch it to the blanking pin and take the black probe and touch it to a ground point.

For the RGB to work I would expect the voltage reading to be somewhere around 1.5 to 5V.

4.79 volts.

[MarkOZLAD]

I measured both.

0.21 volts in the blanking in series with the ground.
0.45 volts in the blanking in series with the 5v supply.

What is this for?

With your mod turned

With multimeter in volts DC

Take the red probe of your multimeter and touch it to the blanking pin and take the black probe and touch it to a ground point.

For the RGB to work I would expect the voltage reading to be somewhere around 1.5 to 5V.

4.79 volts.

Well I'm about out of ideas spikespiegel.

[spikespiegel]

Well I'm about out of ideas spikespiegel.

How can I check the software for the RGB part? To enable/disable. I know how to get into both service menu and memory editor, but I don't have an actual documentation to look at.

[MarkOZLAD]

Thanks for saving me the headache. I have two more sets one is a Samsung TXK2766 and a Sharp 19L-M100S.
Are either of those worth my time? I have the Sharp service manual, heres a link https://diagramas.diagramasde.com/otros ... -%2080.pdf

The Sharp's IX3253CE jungle is a clone of a Toshiba TA1268N. Should also be a good candidate for RGB mod.

[realm]

Thanks for saving me the headache. I have two more sets one is a Samsung TXK2766 and a Sharp 19L-M100S.
Are either of those worth my time? I have the Sharp service manual, heres a link https://diagramas.diagramasde.com/otros ... -%2080.pdf

The Sharp's IX3253CE jungle is a clone of a Toshiba TA1268N. Should also be a good candidate for RGB mod.

Thanks. I'm going to attempt the mod tonight. I studied the schematics, I have just one question. Should I choose my resistors from the 0.7V p-p table or the 0.5V p-p table? I'm not using diodes.
Thanks

[MarkOZLAD]

Thanks for saving me the headache. I have two more sets one is a Samsung TXK2766 and a Sharp 19L-M100S.
Are either of those worth my time? I have the Sharp service manual, heres a link https://diagramas.diagramasde.com/otros ... -%2080.pdf

The Sharp's IX3253CE jungle is a clone of a Toshiba TA1268N. Should also be a good candidate for RGB mod.

Thanks. I'm going to attempt the mod tonight. I studied the schematics, I have just one question. Should I choose my resistors from the 0.7V p-p table or the 0.5V p-p table? I'm not using diodes.
Thanks

0.7Vp-p should be fine for both. Could argue that the datasheet for the TA1268N says to use 0.5Vp-p but in my experience it will handle 0.7Vp-p fine.

[realm]

Ok thanks. After pulling the board and tracing the circuit it's different than the schematic. On the schematic it shows 1.8k terminating resistors on the OSD lines going into IX3253CE, they aren't on the board. The circuit on the board doesn't have terminating resistors and just has 6.8k inline resistors on the OSD lines. Is this something you've seen before?

[MarkOZLAD]

Ok thanks. After pulling the board and tracing the circuit it's different than the schematic. On the schematic it shows 1.8k terminating resistors on the OSD lines going into IX3253CE, they aren't on the board. The circuit on the board doesn't have terminating resistors and just has 6.8k inline resistors on the OSD lines. Is this something you've seen before?

It normally makes me shake in terror....

However in this case I don't think it's a problem. The TA1268N datasheet suggests (to my reading) that the RGB input pins can handle a maximum input voltage of 5.4V so I guess there's no real need for the 1.8K ohm resistors to be installed by the manufacturer.

Three less resistors to remove.

[Syntax]

Measure the resistance to ground from both sides of one of those 6.8k inline resistors just incase.

[realm]

Measure the resistance to ground from both sides of one of those 6.8k inline resistors just incase.

I measured the resistance to ground on both sides of the 6.8k inline resistors. On the side the RGB OSD lines connect to the .1uf caps then to the jungle chip measure 1.8k and the OSD Blanking line 6.8k resistor entering the jungle chip measures 3.3k. The Micom side of the RGD OSD 6.8k resistors measure 8.5k to ground and the Micom side of the OSD Blanking line 6.8k resistors measures 10k to ground. I ended up finding the smd terminating resistors. So it seems to be a pretty straight forward mod.

Since the inline resistors are 6.8k according to the 0.7V p-p resistor charts says the calculated resistor value without using diodes is 1,032 ohm and the next size up is 1100 ohm. And if using diodes the resistor value calculated in 1,285 ohm and the next size up is 1,300 ohm. I only have a 1k ohm resistor can I use that along with 100 ohm to get the 1100 the charts calls for? I also have diodes but the next resistor size up that I have on hand is 1.2k.

[Syntax]

Good, that's why I got you to test that way, I knew that would help you find them, they like to hide them in stupid spots with traces under text ect.
You can add resistors in series like that to get 1100 but not in parallel.

[MarkOZLAD]

Measure the resistance to ground from both sides of one of those 6.8k inline resistors just incase.

I measured the resistance to ground on both sides of the 6.8k inline resistors. On the side the RGB OSD lines connect to the .1uf caps then to the jungle chip measure 1.8k and the OSD Blanking line 6.8k resistor entering the jungle chip measures 3.3k. The Micom side of the RGD OSD 6.8k resistors measure 8.5k to ground and the Micom side of the OSD Blanking line 6.8k resistors measures 10k to ground. I ended up finding the smd terminating resistors. So it seems to be a pretty straight forward mod.

Since the inline resistors are 6.8k according to the 0.7V p-p resistor charts says the calculated resistor value without using diodes is 1,032 ohm and the next size up is 1100 ohm. And if using diodes the resistor value calculated in 1,285 ohm and the next size up is 1,300 ohm. I only have a 1k ohm resistor can I use that along with 100 ohm to get the 1100 the charts calls for? I also have diodes but the next resistor size up that I have on hand is 1.2k.

1000 ohm or 1200 ohm Mux resistors will be fine.

[spikespiegel]

Well I'm about out of ideas spikespiegel.

How can I check the software for the RGB part? To enable/disable. I know how to get into both service menu and memory editor, but I don't have an actual documentation to look at.

Anyone have any documentation, guide, something like that, that I could use as a reference to edit the memory values just so I could enable the RGB?

[realm]

Modding the Sharp 19L-M100S was a success fellas, thanks for all your help. The only issue I have is the picture is very dim and the brightness adjustment on the set does nothing to change it.It also looks like the alignment of the entire picture needs to be shifted down and to the left slightly. May even need to be narrowed left to right.

Here's a pic without the OSD https://drive.google.com/file/d/1tCtaYu ... sp=sharing

Here's a pic with the OSD https://drive.google.com/file/d/1QXnxIV ... sp=sharing

You can see when I press the menu button and bring up the OSD menu, notice where the two signals overlay it's much brighter. On the 8 bit guys youtube video where he mods that samsung set, the first thing he does is solder a jumper wire across a resistor which he said he was told prevented the closed captioning circuit from dimming the display. Could this be what is causing my display to be so dim? The OSD menu is the exact same brightness on a black background as my injected RGB which is very dim. But where ever the two signals overlay on the screen the OSD menu looks bright. It's hard to tell with those pics.

[MarkOZLAD]

Can you describe your blanking circuit?