shmups.system11.org

Shmups Forum
 
* FAQ    * Search
 * Register  * Login 
It is currently Sat Aug 08, 2020 8:09 pm View unanswered posts
View active topics



Post new topic Reply to topic  [ 3222 posts ]  Go to page Previous  1 ... 104, 105, 106, 107, 108
Author Message
 Post subject: Re: TV RGB mod thread
PostPosted: Sat Aug 01, 2020 3:21 pm 



Joined: 26 Mar 2020
Posts: 5
MarkOZLAD wrote:

OSD will continue to work because it is fed into a separate set of RGB pins on the jungle.



One other question on this - I have a SNES 1chip rev3 that outputs sync on Luma - will it work with this mod or I need to do the rgb bypass for the SNES and change it to c-sync? Or maybe I could do something else like use a splitter on the SNES cable and run the green (Luma IS green, right?) both to the new bnc input and any one of the original composite inputs?


Top
 Offline Profile  
 
 Post subject: Re: TV RGB mod thread
PostPosted: Sat Aug 01, 2020 11:23 pm 



Joined: 18 May 2017
Posts: 718
Exclamation wrote:
MarkOZLAD wrote:

OSD will continue to work because it is fed into a separate set of RGB pins on the jungle.



One other question on this - I have a SNES 1chip rev3 that outputs sync on Luma - will it work with this mod or I need to do the rgb bypass for the SNES and change it to c-sync? Or maybe I could do something else like use a splitter on the SNES cable and run the green (Luma IS green, right?) both to the new bnc input and any one of the original composite inputs?


Luma is most likely perfectly fine.
_________________
___________________________________________________
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


Top
 Offline Profile  
 
 Post subject: Re: TV RGB mod thread
PostPosted: Sun Aug 02, 2020 3:44 pm 



Joined: 16 Jun 2020
Posts: 10
Ok, I need some help. I've been working on my Panasonic CT-32G4A. I've determined that it's moddable since it's just about the same as the one devalis modded here: viewtopic.php?p=1226551#p1226551 which has the exact same Jungle IC as mine as he said here: https://forums.nesdev.com/viewtopic.php?t=11648

Here is a basic diagram of the circuit between the Microcontroller and the Jungle chip:

Image

Full schematic here: http://www.planetatecnico.com/foro/down ... p?id=11955

There are no diode or grounding resistors on the RGB lines. Using the OSD Mux chart for 2.2k in-line resistors I used 270 for my Mux lines. The chart called for 283 and it was the closest I had.

Image

I am using a VGA connector as input. To start, I did nothing with the blanking line. My intention was to just activate the OSD on the TV with the RGB Mux in place to see if I got anything when the OSD was showing. I got nothing. The OSD did turn black, though, instead of green. I could see this whenever I set the input back to "TV" and saw the channel # displayed against the static background. It did this whether or not the VGA connector had anything plugged in or not. It seems just having those lines muxed in did it. At one point the OSD turned blue, and I checked and saw that my Blue MUX line had gotten disconnected, but R and G were still hooked in so that made sense.
Then I tried pulling Ys to 5V by hooking it to pin 9 on my VGA connector (not pictured in diagram). When I did that the TV screen was solid black no matter what I did.

Spoiler: show
OSD with mux circuit in place, nothing connected to VGA:

Image

And if I remove the 75 ohm ground terminations:

Image


Jungle IC: https://pdf1.alldatasheet.com/datasheet ... 5165K.html

I should note that I was testing with a PC using a Radeon HD 6450 card flashed with ATOM-15 for 15kHz and Composite Sync using its DVI-I connector with a VGA adapter and booting it to FreeDOS. It's the only 15kHz RGB source I have at the moment, so I can't say for 100% certain that the source is valid.


Top
 Offline Profile  
 
 Post subject: Re: TV RGB mod thread
PostPosted: Sun Aug 02, 2020 11:21 pm 



Joined: 18 May 2017
Posts: 718
Osirus wrote:


These Jungles do not require the caps that you've added on the external RGB lines.
_________________
___________________________________________________
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


Top
 Offline Profile  
 
 Post subject: Re: TV RGB mod thread
PostPosted: Mon Aug 03, 2020 12:10 am 



Joined: 31 May 2020
Posts: 6
UPDATE 2:
Did some more tracing around and found

3 Zener Diodes MTZ10C
DZ209 Y
DZ210 Pb
DZ208 Pr

3 (5?) 330ohm 1/6W Resistors (this really confuses me. There's 3 that are close in number so I am making the assumption those are the ones to bring the voltage down, 330ohm, the other two I am unsure of. Probably will just leave them off, for now.)
R231 Pb
R232 Pr

R712 Y
R711 Pb
R714 Pr

3 15nF 50v (possibly) or 100v (service manual says 100v) Ceramic Caps
C236 Y
C235 Pb
C205 Pr



UPDATE: I found that there are headers on the motherboard for YPbPr so I can do component. The service menu also has option 12 TV<->AV and TV<->AV<->DVD which someone told me if I swap it, it should enable the component headers.

The only issue I am working on right now is I need to rebuild the components missing for component.
C236 Y
C235 Pb
R714 Pr
C205 Pr

Had someone help me research. Looks like 15nf caps and 330 ohm 1/6w resistor is used. Will test and report back.

Those are what I saw missing. Hopefully this all won't be a waste. Trying to track down the values for the 3 caps and resistor.


Hi Everybody!

I have recently obtained a Samsung TXM1491FX-XAA and found the following service manual for it. I have another Sony TV that happens to have digital RGB not analog so I was unable to mod that one. I am unable to actually tell if this is digital or analog RGB. The connector that the composite AV is on looks like a SCART connector would actually fit there so I assume this had a EUR equivalent that actually had SCART w/ RGB possibly.

I model number for the IC is Philips TDA9377 based on the service manual and it references PAL/SECAM/NTSC making me wonder if this supports 50/60 as well.

Image I have highlighted pins 51 through 53 which I believe are the RGB for the OSD which I should be able to jack into with pin 50 which is the blanking input. However I also noticed pins 46 though 48 which may be the native RGB input along with pin 45 which may be the video input switch to go to RGB.

Wondering where everyone suggests I go to from here.


Top
 Offline Profile  
 
 Post subject: Re: TV RGB mod thread
PostPosted: Mon Aug 03, 2020 6:12 am 



Joined: 18 May 2017
Posts: 718
I think you’ll find you won’t be able to scart mod this. I think it’ll be component mod only. Change the service menu to include the DVD option.
_________________
___________________________________________________
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


Top
 Offline Profile  
 
 Post subject: Re: TV RGB mod thread
PostPosted: Mon Aug 03, 2020 6:22 am 



Joined: 31 May 2020
Posts: 6
MarkOZLAD wrote:
I think you’ll find you won’t be able to scart mod this. I think it’ll be component mod only. Change the service menu to include the DVD option.


Hopefully I can restore it with everything I bought. Any ideas why there’s be two extra resistor spots?

Do all TVs that have a DVD player use component to interface? Any easy way to tell?


Top
 Offline Profile  
 
 Post subject: Re: TV RGB mod thread
PostPosted: Mon Aug 03, 2020 1:56 pm 



Joined: 18 May 2017
Posts: 718
KitsuneMulder wrote:
Had someone help me research.


I think I know the guy....
_________________
___________________________________________________
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


Top
 Offline Profile  
 
 Post subject: Re: TV RGB mod thread
PostPosted: Mon Aug 03, 2020 2:37 pm 



Joined: 31 May 2020
Posts: 6
MarkOZLAD wrote:
KitsuneMulder wrote:
Had someone help me research.


I think I know the guy....


Just realized...small world.


Top
 Offline Profile  
 
 Post subject: Re: TV RGB mod thread
PostPosted: Mon Aug 03, 2020 7:53 pm 



Joined: 16 Jun 2020
Posts: 10
MarkOZLAD wrote:
Osirus wrote:


These Jungles do not require the caps that you've added on the external RGB lines.


Thanks. I now see that you've consulted on this chip before: viewtopic.php?p=1370408#p1370408

I'm going to snip the RGB lines between the Micro and Jungle and first see if I can get my external input working at all before working on Mux. The circuit board makes this very easy as all 4 lines have jumpers next to eachother on top of the board just before the Jungle inputs.


Top
 Offline Profile  
 
 Post subject: Re: TV RGB mod thread
PostPosted: Mon Aug 03, 2020 9:28 pm 



Joined: 03 Aug 2020
Posts: 1
Has anyone figured out if the mod for the LA7674 chip, where the blanking signal on the blue input, is possible?


Top
 Offline Profile  
 
 Post subject: Re: TV RGB mod thread
PostPosted: Tue Aug 04, 2020 3:25 pm 



Joined: 04 Aug 2020
Posts: 1
Hey all, I'm brand new to these RGB mods and attempted my first one yesterday with mixed results.

I didn't find this thread until after the fact, I actually asked a friend about it and he helped me get to this point. It's a new-old-stock 14" Vision Electronics VIS-146R that uses the Philips TDA8361 jungle IC and a CTV222S OSD controller. I sent him some photos of the top/bottom of the board and this is what I've ended up with:

- grounded RGB inputs via 91ohm resistors

- attached RGB inputs via 110ohm resistors to the spot where the OSD RGB lines (via resistors of their own) and voltage divider resistors meet (I think that's what they're for, tied to ground)

- the RGB inputs and OSD RGB signals go through the same wires to 3 capacitors right before entering the jungle IC

- 5V VCC taken from OSD controller, into 10K POT, into a switch that switches between OSD and RGB blanking (the TDA8361 wants somewhere around 3V for RGB blanking, the POT is just for testing and will be replaced by a resistor later)

Here's a poorly annotated photo.
Spoiler: show
Image


And here are the results.
Spoiler: show
Image

Image


As you can see, there's what he called "high voltage rings" on the left. Without a game console plugged in, it's still there when I increase the brightness until the blacks are no longer black. I've tried decreasing the flyback voltage to no effect, and also replaced the 2 capacitors on the neckboard and 1 capacitor next to the flyback (I saw some threads online that indicated it may be due to weak HV caps) which didn't change anything either. There are more high voltage caps around the flyback that I don't have replacements of right now.

The second problem is hard to get on video, but the image is sort of jittery as if something isn't grounded properly. It's especially noticeable on the edges of objects like the "Super Mario Kart" title box seen above.

Any ideas? What would happen if I removed the 3 capacitors before the jungle IC and connected the RGB + OSD lines directly to the IC itself?


Top
 Offline Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3222 posts ]  Go to page Previous  1 ... 104, 105, 106, 107, 108

All times are UTC


Who is online

Users browsing this forum: inno, IronGiant, Link83, maxtherabbit and 32 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
Space Pilot 3K template by Jakob Persson
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group