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Showing results for tags 'soldering'.
Found 4 results
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Hi Guys, I need some help, please... I recently bought a 600XL off of eBay, picked it up tested it - all working. Then opened it and found to my delight that all the chips were socketed! A hardware project in the making. First things first - upgrade to 64k. I tried bending a pin on the IC living at U5 and broke the off - the IC can be replaced, right? So, two questions from this (slightly less than competent) amateur modder... 1) I need to replace the IC at U5... is there any difference between an 74LS158 and a 74LS158N IC? 2) If I do this upgrade can I not upgrade the memory futher - i.e. if want an ultimate 1Mb or similar do I a) have to reverse the 64k upgrade, b) leave it in, it's necessary, or c) nope this is the only memory upgrade for a 600xl? Cheers!
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First off, I looked through the treads and couldn't find a good description on building a super cart so if there is already a thread just re-direct. Now, A Super Cart is an almost most must have for the TI-99. So I decided to start a thread for those who might want to build one. It doesn't look to difficult for those with average solder skills (I hope I'm not being naive) so here I go. So I got a super cart PCB from arcade shopper and now want to build it. I got about average soldering skills so I don't think that will be a problem and have been testing de-soldering / soldering chips or junk cartridges. I got a E/A cartridge I plan to remove the GROM from and a got a good black shell (hate the beige). I plan to add to the post as I build for anyone interested in building one. First question, I have yet to get the other items on the build list so if anyone knows a good place for getting stuff like CMOS RAM and the such that I can't get from Radio Shack, MicroCenter or Frys please post. I am going to get what I can today from Radio Shack and will post how far I get.
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Well people, I have been trying to fix up an old Indus GT I had .. that had a bad display. I had thought it was the Seven seg. displays themselves. Now Im not so sure. I removed the old displayed.. replaced them with the same part # but was not able to get them to fit the same way the old ones did.. because the pins have been re-arranged. But they are in. Now I am still getting segments flaking out and disappearing.. and I think its the display board ribbon cable and its connection to the main board. See the attached pics. If anyone knows what type of ribbon or connectors I should search for? or what I could replace it with. I would really like some help on this one. Thanks James
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Hi everyone. I tried asking this question in the other thread, however my issue has some different symptoms. I bought a Atari 7800 from the flea market, got an original power supply with it.. happy as a clam. I have a 7800 controller as well, the odd one. Issue: I plug in the controller to controller port 1, and nothing happens, I plug into controller port 2 and I have full control over player 2, but still nothing on port 1. I plugged in a sega genesis controller as I read it works with the 7800. It does the same thing, does not work on port 1, does on port 2. So I decided to try and open it up and look at the soldering points. I noticed the controller port itself moved ever so slightly when i pressed on it. Not much, but that was enough for me to think I should take a go at re soldering the pins. So i did, I suck at it, but i feel that the redo's were done with proper contact,, they are a little goopy, but they look like they should work. so I plugged everything back up, and still the same issue persists.. I'm happy that this place exists, and I am hoping that if many of you are good enough to successfully mod your 7800 to have composite video/S-video as i've been reading, that perhaps you can work with me on this to see if I can resolve it, thanks. side note, maybe I can take some pictures of my poor soldering job... but you guys know what the board already looks like I suppose.
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