tg_ohio Posted January 29, 2021 Share Posted January 29, 2021 Hi everyone. I'm a new member to the site and a new Atari ST owner. I have a damaged 1040STFM motherboard and I'd like to try to repair it (I've attached a picture of the damaged area). I know it's going to be tough and my expectations for getting it to work are actually pretty low but, hey, it's a hobby and I'm sure it will fun trying. It's a C103225 Rev 1 board. It's pretty clear that something fell on the board. There are a couple of broken traces and a couple of damaged eyelets from what I assume was a previous botched attempt at a repair. Before I even attempt to repair those, I need to determine which resistors go in each position. I tried finding a schematic online but the only one I could find is not very clear and I'm not even sure if it's the schematic for my exact board (not to mention how difficult those things are for a noob to read). Can anyone offer any suggestions on how I can find out what resistors I need? Maybe someone has that kind of information readily available that they would be willing to share or maybe a picture that's clear enough that I can see the bands? Any help would be greatly appreciated! Quote Link to comment Share on other sites More sharing options...
+chue Posted January 29, 2021 Share Posted January 29, 2021 Here’s a pic of a rev 2. Resistors look the same but you should verify. https://www.exxoshost.co.uk/forum/viewtopic.php?t=3216&p=46416 Quote Link to comment Share on other sites More sharing options...
ParanoidLittleMan Posted January 30, 2021 Share Posted January 30, 2021 Well, if someone took out resistors from it, that's most likely because it was broken, maybe seriously and could not repair. That's indicated by writing on chip at right. So repair can be much more harder than putting there missing resistors. Quote Link to comment Share on other sites More sharing options...
tg_ohio Posted January 30, 2021 Author Share Posted January 30, 2021 Thanks for the replies. Trying to discern the colors on the bands from that picture may be my only chance. I'm actually the one that removed the resistors but that's a good point about the chip with the writing on it. I hadn't even noticed that. Quote Link to comment Share on other sites More sharing options...
bfollowell Posted January 30, 2021 Share Posted January 30, 2021 Well, you don't necessarily need to try and make them out from a picture. Assuming you can read all the part numbers silk-screened onto the motherboard, you could look them up on a schematic and it should tell you what the values are. Quote Link to comment Share on other sites More sharing options...
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