qrysdonnell Posted March 18, 2021 Share Posted March 18, 2021 So after my issues with my composite mod (which are probably just problems the system had all along but I didn't notice) I got a recap kit from Console 5 for a few of my systems in my spare pile to see if I could fix them up. The first 'victim' was a Jr that I had which had a pretty similar output to the system I put the composite mod in. Since my problem last time was an issue which may have been there beforehand that I just didn't notice since it wasn't a system I normally used, I decided to take it slow and document every step of the way and this Google Slides presentation has all of my pictures... https://docs.google.com/presentation/d/1csaTT7zJL5_K1UutVZk4IrXtmG32HbMwhzJcsNbbfOA/edit?usp=sharing As you'll see in slide 2, the colors are very subdued compared to my main unit, which is a light sixer. Very noticable on something like Yars Revenge. I replaced the large capacitor (C26), and noticed no change Same with C20. After C27 still the same. After what I think is C37 the picture looked good for a few seconds before reverting to looking like it had before. I wasn't able to get a picture, but it essentially looked like my reference. (C37 was harder than the others to deal with, as it was put in with a resistor going into the same through hole and it was hard to get it all out, get the holes cleared and everything put back - I actually wasn't able to get the resistor leg back through, so I soldered it on top. It looks like this cap wasn't in the place marked on the board for some reason.) I moved on to the voltage regulator which I had the hardest time of all getting the holes clear enough to put the replacement in, as such the area doesn't look too pretty. When trying to turn it on I don't get any picture. LED goes on and I can tell from the change on the screen that it thinks it's on, but no picture. I also can't see any notable difference turning it on with or without a cartridge. I don't really know my way around a multimeter enough to really test, but using the 'beep' function I can tell that I'm getting connections between the parts of the VR and the next spots there's a solder point on the board and I am not detecting any obvious solder bridges, etc. So what to do now? What's the next step to determine if this is salvageable? I don't really know how to test a PCB or components properly, so I may have to start learning that. Could I just have a bad voltage regulator? I had to cut the leads off the old one to get it out with my poor desoldering setup, so I can't easily put it back without hobbling something bizarre together (may try it at some point, but I've had enough for today!). I do have another new voltage regulator because I got two cap kits, but I don't really want to potentially ruin that one yet. I'll troll YouTube to watch some Atari repair videos later, but figured I might get good advice here. I do have a better desoldering solution on the way, so at least the next system might not be as unlucky! Thanks in advance for any help!!! Quote Link to comment Share on other sites More sharing options...
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