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Found 5 results

  1. Hello, So first a bit of a disclaimer - I am a bit of a noob when it comes to electronics repair et all - my soldering is crap, and I am definitely learning this stuff as I go along - so please pardon what I am certain is going to be apparent ignorance. I have a 2600 jr rev E which is displaying poor colors (screen appears mostly greyscalish/monochromatic with some yellow/green tinting on the sprites. I tried adjusting the color pot, which you can tell is affecting the underlying colors but onscreen the result is just changing the grey levels so the screen still remains mostly monochromatic. Adjusted the RF pot to no effect either. Low hanging fruit (IE assumption on my part) seemed like it might be a bad cap, so I purchased a recap kit from console5 for the JR. Replaced the caps (polarity on the caps is correct) Turned the machine back on, colors were perfect for 1 second, and then it reverted to the same symptoms, only this time with audio distortion as well. Ordering ESR meter from amazon to check caps, but while I wait the two days for prime to deliver, I would love to get the communities input. 1) What should I be checking to troubleshoot this? 2) I have another 2600 jr that works (I haven't opened it yet so not sure what rev the board is) - so I could desolder and swap TIA if that's appropriate (my inclination is to socket the chips as well, my board has all three chips soldered to board - so if there is room, I think I will socket them) 3) This is probably a really dumb question - but I am curious all the same, the Jr cap kits comes with new caps for C20, C26, C27, C29, C37 c26 is obviosuly the big cap @ 2200uF 16v the other four c20, c27, c29, c37 are listed @ 4.7uF 35v in the console5 wiki (https://console5.com/wiki/Atari_2600) That said the kit from console5 only comes with 3 replacement caps instead of four. My particular revision lacks c29 so 3 caps were fine, but are there revisions which have all four caps on them? Or does each board revision have only a combination of three of those four caps? . Thanks Xamfear
  2. so about a year ago i did a 2600 Jr av mod i found somewhere where you added 3 resistors to some pins on a chip and got composite video out... only problem is i tried adding a set of jacks instead of having a cable hang out... but now the video signal is gone. i spent like 3 hours trying to fix it, but all i get is scrolling white. i can sorta see some of the sprites, but i can't figure out what was going on, and ended up removing the added parts... but now the capacitor for sound lost a leg... so i need a new one of those also. anyone know of the mod i'm talking about, like i said i cant find it again, or at least another one that worked for you? also it does the same thing when RF is connected back.
  3. I was thinking of Modding my 2600 JR to output AV video. I did a mod to my JR around a year ago, and i ended up killing my board when i tried changing the jacks on it, and i can't find the original posting for the mod i Did. I saw this AV mod for the JR, and i was wondering how well it worked. https://atariage.com/howto/composite.html I think i remember some people saying the video quality wasn't the best, but I am just looking for something that is reasonably good enough to use. If the link does not work just try googling "atariage 2600 jr av"
  4. I have Atari 2600 Jr. PAL-B with Harmony cartridge and standard PAL CRT TV (made 2009). Vast majority of the games (no matter if PAL-50, 60 or NTSC) work 100% but some of them have more or less important issues either with display or graphics: 1. Fatal Run - it is supposed to be a PAL cartridge but look how badly it is synchronized on the real TV.. looks like odd number of scanlines or something wrong with that sort of things 2. Alien 8k - This is I believe a PAL-60 conversion someone made some time ago. The original Alien was NTSC only I think. Sadly, due to some sync problem(?) the display jumps every second or two. I would like to have this game, it is a great Pac Man variant but with that jumping picture... 3. Polaris - The PAL version has messed up credits graphics. It also happens in Stella and seems like not everytime. Don't know why but certainly I would prefer if it did not. The NTSC version seems 100% but colors are obviously off. 4. Spider Fighter - Similar issue to Polaris - the Activision credits messed up. Seems not to be happening in Stella though. Both PAL and NTSC. No other Activion game has this issue. 5. Wabbit - This is an NTSC game and is out of sync with the TV (constantly jumping, flickering). 6. Tomarc The Barbarian - Again, an NTSC game which shows intro screen fine but then completely "blows up" - the only one actually. I can access the TV service menu and there are many values to play with but I don't think any of them will fix the screen issues described above. At least I played a bit with things like Vertical Amp, Shift, even for 60 Hz mode operation, do not remember exactly all of them, and it did not affect the syncing at all. But I do believe that the issues might be fixed in the code because when most of the NTSC (PAL60) games display fine then the problem must be somewhere else. Especially I would like to have a perfectly running Alien 8k and Polaris. If there is somebody who has time and will to help me, I really appreciate that. Thank you.
  5. I have a 2600 jr motherboard that i broke while trying to update a AV mod i did to it. it still outputs a video signal, although in black and white, and it seems to not want to sync with the TV. also there is no sound, due to a broken Capactor. I live in canada, so US shipping is probably going to be a little more (like 12 bucks us for international) I want $10 for the board. You can make an offer if you want to, although i'm trying to make up for having to buy another one. Also if there is any good AV mods for the JR that are not to complex let me know.
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