No.
By this I assume you mean the fact that your termination resistors all ground to the same wire? No. That shouldn't be a problem.
Also, I doubt it has anything to do with the issue, but what is the third wire on your blanking switch?
No.
By this I assume you mean the fact that your termination resistors all ground to the same wire? No. That shouldn't be a problem.
Have you removed R358/R359/R360 (if present)? [DISREGARD, STUPID QUESTION I just looked at pic no. 4 and they clearly aren't there]Ramzelle wrote: ↑Mon May 13, 2024 11:29 pm 4th pic, the wires are not soldered in on this pic I forgot to take the image but are soldered to the far leg of each cap as to filter through before going to the jungle chip. all but 1 solder joint was done on the top side of the board. Pulled power from the bottom side of the micon pin 46 because of an RF Shield. C375 was already empty and unbridged on my model so I couldnt remove that to improve brightness. If you want I can get a pic of the bottom and top side if itll help
the only thing I can think of is to cut the Pb Resistor in half to increase brightness but that might only fix my blue issue. I could try to sync to the front Svideo port but not sure if that change a damn thing.
Third wire is ground, I assumed i should ground it just in case of internal short
Added the caps myselfBard_the_Bowman wrote: ↑Tue May 14, 2024 12:09 am Also did you add the caps in pic no. 4 or were those already present? The reason I ask is that I just want to double check they actually are 0.01 uf and not some wildly different capacitance. I looked up the service manual for your unit and I can't find those caps, so I'm not sure what the default value would be.
no jumpers were removed just the resistorsBard_the_Bowman wrote: ↑Tue May 14, 2024 12:09 am And to expand on my last question, if C360/361/362 were NOT populated from the factory (which I'm guessing MIGHT be the case since I can find no reference to them in your service manual), were there jumpers at JR351 and JR352?
I doubt it's the jumpers cause if it had them, and you hadn't removed them, the signals would be shorted and you'd have a profoundly messed up image I would think. And I also don't see them listed in your service manual. But it MIGHT be worth double checking if all else fails. They're little surface-mount chips on the underside of the board.Ramzelle wrote: ↑Tue May 14, 2024 12:59 amAdded the caps myselfBard_the_Bowman wrote: ↑Tue May 14, 2024 12:09 am Also did you add the caps in pic no. 4 or were those already present? The reason I ask is that I just want to double check they actually are 0.01 uf and not some wildly different capacitance. I looked up the service manual for your unit and I can't find those caps, so I'm not sure what the default value would be.
no jumpers were removed just the resistorsBard_the_Bowman wrote: ↑Tue May 14, 2024 12:09 am And to expand on my last question, if C360/361/362 were NOT populated from the factory (which I'm guessing MIGHT be the case since I can find no reference to them in your service manual), were there jumpers at JR351 and JR352?
Image shows all the work that I did
https://imgur.com/a/ktkdJxH
It sounds like you may have some components left in circuit. Did you disconnect everything from the PIP circuit?Ramzelle wrote: ↑Mon May 13, 2024 5:38 am So I did so more trouble shooting on my AA-2D tonight. I found that when I switched back to composite my colors and brightness came back and the Tube wasn't as worn as I thought it was. Re-Tuning the Screen for composite I found that the image was fairly crisp and not blurry and I believe a lot of my issues have been from trying to compensate for the loss of color and brightness in my Component mod. It sound like my version of the AA-2D is slightly different than Bowmans since I did not have a cap in the same spot as him but overall they should be fairly similar.
I am trying to figure what I should look for to try and trouble shoot all this brightness and color loss. would too many ohms on a resistor, or a diode or some cap be pulling voltage and causing my issues. I am obviously not formally trained in small electronics but if I have something to go on I could try to investigate further and maybe cut an unimportant trace or something along those lines.
I believe so, I removed the resistors and the pip circuit board has been removed. according to the research I did that was everything that needed to be removed ill pull the board and take some photos. maybe I missed something that is specific to this model. I tried to look at the service manual and previously posted a picture of the svideo circuit but personally couldn't see if there was anything that I forgot in circuit.
Ok. First things first. Does it show a stable image using a tested good component video source?warcelo wrote: ↑Sat Jun 01, 2024 6:44 pm Hello, folks
I need help finding out what is wrong with my setup.
Description of the system:
Sony KV (BA-4) 20M40 with Component MOD
HDMI to component converter -> https://www.amazon.com/dp/B082HT11MH?re ... i+to+compo
PC with Intel UHD 620
The goal is to run Retroarch and get it on the CRT at 240p.
I used CRU to create a resolution of 2560x240 @60HZ and I can select it for the second display.
Problem is, it does not show a stable image, it is warped to the right with some artifacts. - The colors seem to be correct, I can see my desktop and it looks right but it is far from stable.
First thanks for the reply.KPackratt2k wrote: ↑Mon Jun 03, 2024 11:12 pm Have you tried desoldering the YUV pins of the jungle chip and carefully lifting them from the board to isolate possible PCB trace routing interference? It's possible that the YUV lines on the PCB are near traces that could cause interference. I had minor noise on previous Sony BA-4 chassis TVs that I've modded, but it was never this severe, the two that I personally have (a KV-27V42 and a KV-20S41) don't have this issue, so it's possible that the traces on the older chassis revision were noisy and later revisions fixed it.
This looks like your picture is shifted too far to the left. That's an issue with both component and RGB mods. What happens is that because you have active data in what's supposed to be the blanking interval, the TV clamps the video signal at the wrong level and draws the whole line at the wrong brightness. Note how the banding correlates with dark and light areas at the left hand edge of the screen. That's also why it was worse with composite - the picture was even further to the left.MattAnderson wrote: ↑Mon Jun 03, 2024 10:04 pm So I'm posting again because my last question got buried.
I have horizontal lines on my screen after doing this mod.
Below are the pics. I've tried everything I can think. I've tried using an S-Video cable to ground S video, I've tried syncing from Composite (made it MUCH worse actually).
I removed the 0.01uf Capacitors to the PIP header and soldered my own wire and capacitor directly to the jungle chip.
The lines persist from any video source, DVD player, PS3 or anything else.
Oddly enough they're in the exact same place every time on the same scene. So if I go back to the video at the same time stamp the lines will be exactly the same every time, which makes me think the Luma isn't being decoded properly.
I'm extremely discouraged, as I've went through everything over and over again, tried multiple 5v sources for blanking, tried 3 different wire types included shielded.
It ONLY Happens on the component input, S-video and composite are flawless.
The only time I can replicate it is when I have an S-video input and I flip the switch and it shows the black and white input of the S-Video's Luma input (because I'm using S-Video Luma as Sync).
Anyone encountered this on their component mod?
There's typically a detailed procedure for setting up the H osc. When I've done it, it involved shorting a transistor to ground and displaying a white square on a black background. You then adjust the osc for when the square stops drifting, or the closest you can get it. When you did the mod, it probably just pulled that out of spec. You might be currently overcompensating for it with other settings.MattAnderson wrote: ↑Fri Jun 07, 2024 6:07 am Wow thank you so much.
I moved the HPOS and HSIZE which helped a bit, but it was the H VCO OSCILLATION FREQ that helped the most. I increased it from 7 to 15 and it almost eliminated it completely.
Hey Matt, I tried going with this approach and I'm now getting a terrible interference/hum out of the right audio channel. Do you have any thoughts on what might be causing that or how I might reduce it?matt wrote: ↑Tue Apr 16, 2024 9:50 amYou could use a 5PDT rotary switch and use two of the poles for audio. You'd have to cut the audio connections from the rear jacks in the process. On thing to keep in mind if you hook audio up internally, the TV joins both channels together if there's nothing plugged into the red RCA jack so you'll have to cut that connection. I wouldn't have two systems plugged in at once - at the very least it'll hurt the sound quality. External switchers are easy to get and might be less trouble overall.Ramzelle wrote: ↑Tue Apr 16, 2024 5:44 am Thanks for all the help, I decided to map out the project so I could get a better understanding. Please let me know if I messed something up.
1. I would like to completely preserve Video 1 if possible, is there a switch that could do the following? and is this a hazard if I accidentally send 2 audio signals at the same time.(i.e. I've read ps2 always sends power down audio)
- Blank 5 Volt
- Send Sync to Luma
- Send Comp Audio L to Video 1
2. Should I run the 5v before or after the R1352
- Send Comp Audio R to Video 1
You may have to use one pole for the S-Video detect pin (I think this TV has one). And, if you want to separate the S-Video input you'll have to cut the sync signal as well.
The video signals need to pass through the coupling capacitors on their way to the jungle chip. Your diagram has them on the wrong side.
The blanking signal should be fine on either side of that resistor.
Usually this is a grounding issue.Bard_the_Bowman wrote: ↑Tue Jun 18, 2024 7:32 pmHey Matt, I tried going with this approach and I'm now getting a terrible interference/hum out of the right audio channel. Do you have any thoughts on what might be causing that or how I might reduce it?
Thanks! I’ll re-check my ground connections and termination resistors. Once I get the TV working again anyway. I shorted something on the motherboard accidentally while working on it and it won’t power on now. Haven’t been able to diagnose the problem yet, but all the capacitors, diodes, and resistors near the area I shorted seem good.matt wrote: ↑Fri Jun 21, 2024 10:16 pmUsually this is a grounding issue.Bard_the_Bowman wrote: ↑Tue Jun 18, 2024 7:32 pmHey Matt, I tried going with this approach and I'm now getting a terrible interference/hum out of the right audio channel. Do you have any thoughts on what might be causing that or how I might reduce it?