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They should stay at 75ohm In series will control color. You can bypass this by using the luma channel on svideo for sync and bridging the svideo grounds, wire your audio to that AV channels inputs and cut the trace that connects left audio white to right red.
CXAS Datasheet, PDF – Datasheet Search Engine
I was hoping some of you had some suggestions on what to try next. To control color you can add pots to each color channel.
You’ll only need 1k pots really it wont need much adjustment. Yeah I was totally wrong, you get But the console is still to washed out and bright in this configuration also. Its super straight forward. So for a nominal 75R termination anything between 60R and 90R datashert actually work fine.
For trouble shooting put a switch on the 5v blanking with no console connected. Anyway I have tried to draw a simple diagram of what I have done, I am assuming it is wrong: Tue Sep 19, You’ll have a hard time finding them cheaper anywhere else. Looks like I removed the original.
I meant put the pots in line on the RGB feed lol, not as terminations. It leaves me confused as to why there is an issue. Thu Sep 21, 4: On my rgb modded sony trinitron kvfs the color control and cxa21339s on the osd is disabled when I use rgb but the other controls work just fine like brightness and picture,you guys think it’s hardware or software as datasjeet like to re-enable them.
I just wired my sync from the rca jack to the y pin on the header that connects the IO board and the jungle board.
So pins 14,15,16 I’m snipping at the legs of the capacitors coming into the osd and I’m hooking my rgb wires from my game console their to the osd input of pin 14,15,16 then I’m I’m feeding power to the rgb vcc on pin 18 I should add somewhere around 1 volt up to 9 volts to get it to blank to rgb the circuit says it takes 9 volts on their what should I do about the black pin To ground with a and use 1 uf caps and make cxa2139x it doesn’t have any resistors on that lineI’m trying to fiquire where to take the rgb signal away fromand send it to what chip the jungle chip then bypass the micro controllerI datasheeet I’m on the right track Inspect the chassis manually.
See if it changes the screen. Really great information out here. I’ll try datsaheet the sync directly to the jungle IC. What technique did you use to do the mod?
I did this for the first time last night because a Panasonic set would not take sync via svideo or component, and I found that the sync wire needed to be shielded as it was picking up a lot of interference. It’s mostly working but the blacks are grey. Were it not for the convergence issues this could very well have been a religious experience.
When you add another 75ohm termination resistor to a line that already has a ohm termination the total resistance is ohm. Thu Sep 21, Wed Sep 20, 5: I should probably add some installation pictures to that gallery.
CXAS Datasheet(PDF) – DATASHEETBANK
Tim sells 6 gang 10k pots very cheap and they are great for turning all 3 colors up or down at the same time. Page 35 of To ground with a and use 1 uf caps and make sure it doesn’t have any resistors on that lineI’m trying to fiquire where to take the rgb signal away fromand send it to what chip the jungle chip then bypass the micro controllerI hope I’m on the right track.
Wed Sep 20, This chip has a very brief datasheet! However the proposed solution is to use 0.
I know about the 75 termination,just wanted something to mess around with,can dial it back to normal easy. Users browsing this forum: Awesome,that will work just fine.
Previous topic Next topic. So the set will not allow signal via those inputs until a plug is actually in the cxa21339s. It is currently Mon Dec 31, 1: As for the pot I found one on ebay for under 11 usd so I’ll grab that,thanks again.
The diode should mean the OSD remains at it’s initial whatever. So we have been connecting the console and OSD directly together, which causes all types of issues. So I tried a proper OSD hack on these units and yep, black is as black as midnight. Based on previous datawheet and the similar pinout, this chips likely behaves very similarly to other CXA21xx jungle ICs https: I’m pretty annoyed as it means I now have to reopen units and switch them to an OSD hack.
Hi Guys, I pondered creating a new thread for this but thought it’d make more sense to post here. Diodes have around 0.
Syntax, thanks so much for your detailed response, much appreciated. I prefer to use the stock traces and shielded cable where I can to avoid interference.
When in parallel it was close enough to 75 that it shouldn’t of been a problem for the console but the OSD takes a huge hit from its Vpp being grounded so heavily.