68kMLA Classic Interface

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Recap gone right?
Posted by: EmmyOcelot on 2020-07-11 08:21:07 Howdy everyone! A while ago I got recommended the advice to recap my Q610. Well, today was the day and I finally did it....only to not be sure if I have them on the right way. Can someone confirm I have soldered them on the right way? Last thing I want is for them to snap crackle pop....
Posted by: max1zzz on 2020-07-11 09:38:46 Yes they are correct, the stripe on tant's goes to the positive
Posted by: Byrd on 2020-07-11 09:44:29 Was just going to post same! My experience with recapping two Q610s recently is make sure you clean up the old cap residue using a cotton bud dipped in alcohol. This is essential practice for all recapped Macs, however I found the Q610 board needed an extra good clean before reliability returned.
Posted by: EmmyOcelot on 2020-07-11 09:50:26 Oh thank goodness! I really thought I was going to have to reverse them. 😉
Posted by: EmmyOcelot on 2020-07-11 10:40:18 Well....just goes to show. Check the polarity of all caps.
Posted by: cruff on 2020-07-11 11:36:47 Oops, but at least you know which one to reverse now.
Posted by: EmmyOcelot on 2020-07-11 11:56:11 Could the one cap kill the board? I'm still going to swap it out tomorrow.
Posted by: Daniël on 2020-07-11 19:32:40 Could the one cap kill the board? I'm still going to swap it out tomorrow. It'll likely be fine, those tants don't tend to take anything with them when they go, unless a component is very near and gets heat damaged, which is not the case here.
Posted by: EmmyOcelot on 2020-07-12 01:23:19 So I just redid that capacitor (thank god there was still some of the pad left) and while it doesn’t blow up, I get no boot up chime or activity from the floppy drive. Where should I begin to look next?
Posted by: Daniël on 2020-07-12 03:02:58 So I just redid that capacitor (thank god there was still some of the pad left) and while it doesn’t blow up, I get no boot up chime or activity from the floppy drive. Where should I begin to look next? Have you thoroughly cleaned the areas around the capacitors? Stray cap goo could cause it to not boot. If that doesn't work, start looking for any traces that look darkened or blackened, this is a sign of corrosion.
Posted by: EmmyOcelot on 2020-07-12 03:24:21 Yeah. That did it. Still am having issues with SCSI though. Good news is that it boots and doesn't catch on fire. Now to find out why the SCSI doesn't work.
Posted by: MrFahrenheit on 2020-07-12 15:18:15 Just a question for you: What caps did you install on your Q610? I ask because I put a set on mine that I thought I would test out (higher voltage) and it made the system not recognize SCSI similar to yours. I then desoldered the caps I freshly installed, and went back to my normal capacitors and voila! it worked perfectly.
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