Main > Monitor/Video Forum
GreenAntz RGB to component transcoder
Ond:
--- Quote from: Daniel B. on April 29, 2024, 09:54:06 pm ---Can u send me tracking just so I can keep an eye?
it's no problem (the delay) Your health is more important and you never once made me worry I made a bad decision. I'm excited for the blue LED!!!
To all reading, I'm going to try to learn Fusion3D to design a case for Greenantz and will make the STL file public or will print for you for price of plastic and shipping!!!!!
It's the kick in the ass i need to learn this software. If this guy and his buddy could create a dope ass transcoder - I could learn 3d modelling for 3dprinting right? RIGHT!
I work 80 hours a week 6 days a week, It could take awhwile.
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I think you should learn 3D modelling for 3D printing!
Naponic:
New version looks promising. My older version from last year though, is exhibiting yellow tinting now. I've ruled out cables, the graphics card (R7 370) and TV. Was working flawlessly till a couple months ago then it became frequent. After inspecting the board checking all the parts to see if anything looked out of sorts, I tried an air can on the main chip and starting to think its heat issue? Attached a gif
Zebidee:
Welcome to BYOAC!
Sorry to hear about your problems! It certainly looks like a connection issue on the Pb (blue) channel, or maybe the blue part of the RGB input. Not quite clear sure which from the gif.
Firstly, I will replace it with a new one for you, no worries. I'd appreciate it though if you can send the old back to me, so I can do some diagnostics on it.
Before that though, try disconnecting the Pb output cable (middle, usually blue) to see what difference that makes, and also try lightly tapping/poking (with a pencil or similar) the board in different places to see if it makes the signal come back at all. Try swapping cables around
Inspect the board closely, top and bottom, and clean any gunk off carefully (ideally with some isopropyl and an old toothbrush and/or Q-tip). It is possible that a loose or "cold" solder join has developed over time and/or with temperature changes, physical movement etc.
Check the blue 75R termination resistor, marked with a "B", near "left" end of main IC, near two aluminium electrolytic "can" capacitors. On the underside, it makes part of the GreenAntz logo "face". This resistor being loose could create your problem.
Do you get power from the PC via USB?
Some thoughts:
- Try some decent shielded-core component/DVD video cables. It looks like you are using AV cable (yellow/red/white) which will likely work in a pinch, but is not really the same. It is typically not shielded or rated for component video.
- Install the supplied PCB offset legs (L-shaped, white). Even if you aren't installing into a cab or box, these help protect the underside and give you something to hold it with.
- GreenAntz is fairly tough but has no box. Handle with care, keep it in a reasonably protected area to avoid inadvertent damage. Only hold the unit by the outside edges or PCB legs. Parts are recessed from the short edges and corners to make this easier.
- Electronic chips can be sensitive to static charges, like from carpet or a sweater. Discharge yourself before close handling. When I test them (before attaching legs), I rest them on some clean paper or cardboard.
Your compressed air tests are interesting. It may also indicate a loose connection. In general, I'd be surprised if the colour matrix chip (the "main" or long one) is failing - they are fairly resilient and generate very little heat normally. The video amplifier chip (smaller, square, 14 legs) runs warmer, but even that is barely noticeable after hours of operation. Do the ICs feel hot at all? Test with a pinky finger on top (ground yourself first, touch a metal frame or something), should not be any hotter than "barely warm", a few degrees above room temp. If either chip is running hot, it suggests a short or something else is wrong, disconnect immediately.
Easier still, just exchange it for a new v1.94, they are better anyway :D
--- Quote from: Naponic on June 03, 2024, 10:18:35 am ---New version looks promising. My older version from last year though, is exhibiting yellow tinting now. I've ruled out cables, the graphics card (R7 370) and TV. Was working flawlessly till a couple months ago then it became frequent. After inspecting the board checking all the parts to see if anything looked out of sorts, I tried an air can on the main chip and starting to think its heat issue? Attached a gif
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Naponic:
Thanks Zebidee. Will give all of your recommendations a try. Will pm you my tests results and pictures as to not hijack this thread. Love your work and I Appreciate the help!
Naponic:
Working on prototyping a box for this fine piece of circuitry for submission. This is just the broad strokes for now, will be breaking out the calipers for fine tuning all clearances, than moving on to aesthetics. :)