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 Post subject: Re: TV RGB mod thread
PostPosted: Wed Oct 23, 2019 4:48 am 



Joined: 14 Jul 2019
Posts: 11
i tried the modification you suggested and now the OSD is way bright and washed out also the red amp must be there for a reason because now theres almost no red on the OSD.
i think im gona go back to where it was before and play with the resistor values because theres all kinds of weird interference and garbage on the screen when theres no external RGB signal.

unless you have some other suggestion.

thank you for all your help


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 Post subject: Re: TV RGB mod thread
PostPosted: Wed Oct 23, 2019 6:51 pm 



Joined: 11 Oct 2019
Posts: 8
I recently picked up a Sony KV-32FS100 which has the purportedly common CXA2154AS jungle chip, and I'm looking for a little help modding it. I've found the following post in this thread that I've based my design off of:

DrZhark wrote:
first of all thanks for all the pioneers for your great help.

I've just tried modding my Sony KV-27FS100, and it worked but there is an issue that's driving me nuts, I'm hoping someone can help me figure it out.

The sony KV-27FS100 has the well known Jungle IC CXA2154/5AS

https://i.imgur.com/N2dxf78.png

So I added SCART connector with 75 Ohm to ground and 0.1uf (104) capacitors then ran the RGB cables to a 4PDT switch,
on the TV, I lifted pins 40 (YS2/YM), 41 (B-IN), 42(G-IN) and 43 (R-IN) and connected them to the middle of the 4PDT switch, and ran four cables to where those IC pins were connected on the board and plugged them to the other side of the 4PDT switch.

for blanking, I connected a 5Volt from the main TV board to the remaining pin of the 4PDT switch (that connects to pin 40 of the IC switch).

I also connected the ground from the SCART to a ground PIN on the TV mainboard.

finally, connected CSYNC to luma and Audio L and Audio R to the SVIDEO (Video1) input on the TV

and it works, I can use the switch to active the OSD or the RGB in, there is a very good quality video on Video1.

Image

Image

However, the right third of the screen is lighter than the rest. This only happens when I use the RGB in, it is completely normal if I use S-VIDEO, composite video or Component video.


I tried disconnecting the Audio lines (no difference), disconnecting ground from the SCART (no image)...

I'm wondering if the issue is due to the blanking? I'm connecting 5v directly (no resistors). any ideas? Thanks in advance!



DrZhark's post is for the 27" version of the same model (mine is a 32", they even share the same service manual, so they should be otherwise identical). Ultimately, DrZhark uses capacitors on the scart connector sized to match the ones on the jungle chip's input pins (0.1uF for the Red-in, and 0.01uF for the Green/Blue-in's). According to him this works perfectly, but when I went to take mine apart, I noticed a discrepancy with the capacitor names.

Image

According to the schematic, pin 43 (R-IN) goes to capacitor C353 (0.1uF, 16v), but the actual circuit board has a cap labelled C354, which is actually 0.01uF (verified with my meter after severing the trace between the pin/cap).

I had originally planned to use a 0.1uF cap on the scart connector like DrZhark's build, but now I'm not sure what to use.

Has anyone else worked on one of these models? Thanks for the help


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 Post subject: Re: TV RGB mod thread
PostPosted: Fri Oct 25, 2019 7:30 pm 



Joined: 04 May 2015
Posts: 24
Hey, a few years ago I modded my sony kv-27s42 with the less desirable method of disabling osd thru a switch (please be kind), but now I'm having one major issue with color, albeit intermittent (so I don't have a picture currently but it's very easy to describe).

My issue is that while I was playing snes on the tv, the screen all the sudden went blue, not totally blue, but like blue washed over the entire screen. Basically, black became blue but ONLY through my hacked rgb input (example, I turn on the tv when it's switched to the rgb input and it's all blue, not black). On the other side of things, when I switch back to normal function/osd, then there is NO blue in the osd. I don't know much about this stuff beyond what I needed to learn to do the mod, but my guess is that I'm looking for a blown cap or a cold solder joint? Something in the blue drive circuit? As I said the problem presented suddenly but then the last time I went to turn the tv back on to take a picture it suddenly snapped back to normal.

tl;dr I modded a tv thru the old(dirty) switch method and now everything that's supposed to be black is blue thru my rgb input when its selected, but there's no blue in the osd when I switch it back to normal function. Seems like my hacked rgb input is getting all the blue for some reason.

any ideas/help would be appreciated, thanks.


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 Post subject: Re: TV RGB mod thread
PostPosted: Sat Oct 26, 2019 1:40 pm 


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Joined: 09 Aug 2017
Posts: 1276
Location: Australia
If in doubt about a color always test its resistance to ground. If its different to the other colors then fix it.


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 Post subject: Re: TV RGB mod thread
PostPosted: Mon Oct 28, 2019 3:45 am 



Joined: 14 Jul 2019
Posts: 11
switches have physical contacts in them that get dirty/worn over time, i bet if you jumped around your switch it would work normally.

one thing i would suggest is that if you do the mux/mix mod and use the 5v from your external source to switch blanking that you put a diode inline. i have noticed on a couple of tvs that when the console is plugged in and off it pulls the signal low and causes issues with the osd and the other inputs.


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 Post subject: Re: TV RGB mod thread
PostPosted: Wed Oct 30, 2019 7:25 pm 



Joined: 30 Oct 2019
Posts: 1
I am modding my GE 19" CRT for RGB input. I have one small issue, the TV is RF input only and I am struggling to find a sync signal. I was thinking of soldering to pin 37. Any thoughts? Thanks! Schematics: https://docdro.id/bQJ9s6P


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 Post subject: Re: TV RGB mod thread
PostPosted: Mon Nov 04, 2019 1:20 am 



Joined: 04 Nov 2019
Posts: 3
Hello!

Could any good soul help me with RGB modification for this IC model?

Image

* This IC is from a Samsung CL-21K40MQ television.

Thanks in advance!


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 Post subject: Re: TV RGB mod thread
PostPosted: Mon Nov 04, 2019 7:01 am 



Joined: 04 Nov 2019
Posts: 1
KnuckleheadFlow wrote:

Results were a near perfect RGB picture! I took some photos, but I wasn't satisfied with how those turned out TBH. I can try again later if people are interested. There's a purity or convergence issue in the upper right corner that I'll have to address but with no OSD being muxed by the PiP board I couldn't do it with the RGB input... or could I?



I've just finished this mod and it looks great! Thanks for the help. Only trouble is that now my picture is shifted a couple inches to the left.

For sync, I've tapped into the composite RCA jack, and ran it to a BNC connector.


https://photos.google.com/photo/AF1QipOknpAVdzbTqkk0RuLlmQ78CuhxcBwIBPoHYdRJ


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 Post subject: Re: TV RGB mod thread
PostPosted: Tue Nov 05, 2019 12:34 am 



Joined: 04 Nov 2019
Posts: 3
Hello people!

Could someone help me with modifying RGB (and if possible S-VIDEO) of a SAMSUNG CL-21k40MQ?

The chip diagram is below (it is a unique chip for micron and jungle).

Spoiler: show
Image


Thanks in advance!


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 Post subject: Re: TV RGB mod thread
PostPosted: Fri Nov 08, 2019 12:05 am 



Joined: 18 May 2017
Posts: 619
llsique wrote:
Hello people!

Could someone help me with modifying RGB (and if possible S-VIDEO) of a SAMSUNG CL-21k40MQ?

The chip diagram is below (it is a unique chip for micron and jungle).

Thanks in advance!


I don't think this one can be modded for RGB input via Jungle injection. In my experience when these TDA935X/6X/8X jungles have their INSSW2 (pin 45) tied to a voltage line they are locked to Component input only.


S-Video looks possible though. Change the Service menu setting "10 AV Option" to "AV1/2/DVD/SV" and fill in the missing components on the chassis.
_________________
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MarkOZLAD
OSD/External RGB Mux Diagram
OSD/External RGB Mux Resistor Value Table 0.7Vp-p : 0.5Vp-p

"Imagine toggle switch OSD modding a TV in 2019" - maxtherabbit


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 Post subject: Re: TV RGB mod thread
PostPosted: Fri Nov 08, 2019 4:15 pm 



Joined: 04 Nov 2019
Posts: 3
MarkOZLAD wrote:

I don't think this one can be modded for RGB input via Jungle injection. In my experience when these TDA935X/6X/8X jungles have their INSSW2 (pin 45) tied to a voltage line they are locked to Component input only.


S-Video looks possible though. Change the Service menu setting "10 AV Option" to "AV1/2/DVD/SV" and fill in the missing components on the chassis.



Looking at the TDA datasheet in question, pin 45 (INSSW2) has two states (0 - RGB and 1 - Video component). I believe that by interrupting the voltage applied to the pin today, the state becomes RGB and it would be possible to inject the RGB signal directly into the pins of the component video (the sync in the s-video luma).

Am I right or am I seeing something where it doesn't exist?


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 Post subject: Re: TV RGB mod thread
PostPosted: Sat Nov 09, 2019 12:24 am 



Joined: 18 May 2017
Posts: 619
llsique wrote:
Looking at the TDA datasheet in question, pin 45 (INSSW2) has two states (0 - RGB and 1 - Video component). I believe that by interrupting the voltage applied to the pin today, the state becomes RGB and it would be possible to inject the RGB signal directly into the pins of the component video (the sync in the s-video luma).

Am I right or am I seeing something where it doesn't exist?


Those modes refer to the IE2 register in the chip’s I2C registers. You will find that the IE2 register is locked into YUV mode by the chip’s software.
_________________
___________________________________________________
MarkOZLAD
OSD/External RGB Mux Diagram
OSD/External RGB Mux Resistor Value Table 0.7Vp-p : 0.5Vp-p

"Imagine toggle switch OSD modding a TV in 2019" - maxtherabbit


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 Post subject: Re: TV RGB mod thread
PostPosted: Mon Nov 11, 2019 9:21 am 



Joined: 28 Dec 2018
Posts: 10
Hi Guys,

Just found a KV-AR21M30 on the side of the road. Picture is great.

Anyone have a clue if this can be RGB modded or is it worth getting the new RGB2COMP when available?

Spec Sheet

https://diagramas.diagramasde.com/telev ... R21M30.pdf


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 Post subject: Re: TV RGB mod thread
PostPosted: Mon Nov 11, 2019 8:59 pm 



Joined: 18 May 2017
Posts: 619
krimstah wrote:
Hi Guys,

Just found a KV-AR21M30 on the side of the road. Picture is great.

Anyone have a clue if this can be RGB modded or is it worth getting the new RGB2COMP when available?

Spec Sheet

https://diagramas.diagramasde.com/telev ... R21M30.pdf


Can’t be modded. RGB locked out in software. Lovely sets with great sound.
_________________
___________________________________________________
MarkOZLAD
OSD/External RGB Mux Diagram
OSD/External RGB Mux Resistor Value Table 0.7Vp-p : 0.5Vp-p

"Imagine toggle switch OSD modding a TV in 2019" - maxtherabbit


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 Post subject: Re: TV RGB mod thread
PostPosted: Wed Nov 13, 2019 2:07 am 



Joined: 13 Mar 2018
Posts: 4
Location: Minnesota
I have a Sony KV-35S42, and I’m hoping someone can look over this information and see if I’m understanding it correctly and answer a few questions. Note: I would like to use the menu when in RGB, so hopefully this is the Mux method.

I asked a fellow forum member with the same TV for some help, and he was able to provide a drawing on how to preform this mod.

Image



Here is some Service manual info I found on the TV:

Image

Image
Image



So based on this information, is this what I should do?

RGB Lines:
- Remove R1123, R1128, and R133 (390 Ω – resistors going to ground)
- Replace R1355, R1356, and R1357 (100 Ω) with jumpers (0 Ω)
- Replace C363, C364, and C365 (0.01uf) with 0.1 uf capacitors
- From the SCART connector (Pins 7, 11, 15): Connect each pin with a 75 Ω resistor to ground, and a 910 Ω resistor to OSD.

Question: Where should I connect to the OSD from the 910 Ω resistor? Should I connect to the area where I put jumpers on R1135, R1356, and R1357?

Blanking Line: (This is where I get confused)
- Replace R067 (470 Ω) with a 180 Ω resistor.
- Replace R1354 (220 Ω) with a jumper (0 Ω)
- Connect Jungle pin 6 (SVCC) with pin 15 (YS)

This is were I get confused. Isn’t pin 6 on the Jungle 9V? From the data sheets it looks like pin 15 is looking for 1.0-3.0V for blanking. Or am I reading that wrong?
Should I look at doing Blanking a different way? If so, how would I go about that?
I believe I've seen people take 5V standby power, and run it directly into the blanking pin (pin 15) with a switch. Is the method above better?

Sync Line:
- SCART pin 20 to S-Video Luma

Audio Lines:
- SCART pins 2 and 6 to L/R RCA on TV.

Question: Do I need to put a 1K Ω resistor in-line?

Do I need to add any on/off switches anywhere?
Thanks for any help I can get.


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 Post subject: Re: TV RGB mod thread
PostPosted: Wed Nov 13, 2019 3:33 am 



Joined: 18 May 2017
Posts: 619
Not necessary to replace R1355, R1356, R1357 with a jumper. Just leave them in place.

Shouldn't need to replace C363, C364 and C365 capacitors. Can leave this to later anyway if you experience issues.

For blanking I'd just use 5V through a switch then into a 470 ohm resistor and connect to jumper JR1801. Otherwise leave blanking circuit intact.

Yes R1123, R1128 and R133 need to be removed but you should use 330R, not 910R. Connect to JR1802, JR1803 and JR1804.



> - SCART pins 2 and 6 to L/R RCA on TV.

> Question: Do I need to put a 1K Ω resistor in-line?

No.
_________________
___________________________________________________
MarkOZLAD
OSD/External RGB Mux Diagram
OSD/External RGB Mux Resistor Value Table 0.7Vp-p : 0.5Vp-p

"Imagine toggle switch OSD modding a TV in 2019" - maxtherabbit


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