I recently picked up a an old Apple //c color monitor from 1985. I noticed the color controls were quite touchy, so I opened it up to see how hard it would be to get the pots out to clean them. And I saw a cap that looked like the top was bulging pretty good.
So out the logic board came, and now I'm looking to recap the whole thing just to be safe. Unfortunately, Apple didn't believe in board level repairs, so schematics are non existent. I had to go through and inventory it manually, and have no idea where in the circuit any of these really are to even guess what type I should replace them with.
The majority of the caps appear to be some purple wrapped Samhwa caps? Which I had never heard of. Some have series markings on them (mostly SA, a couple GA's, an HR, and a couple with no series markings. I can't seem to find much info on them. Am I OK to just really use most any series from the trusted brands (Panny, Nichicon, UCC)? Should I stick to general purpose, or go low ESR/High frequency?
There was also a yellow sleeved Samhwa RM series cap. I think that means its a special "low leakage", cap correct? I think the main modern replacement for that is the Nichicon KL series?
There was also a handful of caps that at first I thought were UCC caps, based on the logo. But it looks like they say Samyoung, or maybe even Samsung inside the logo? The printing is kind of hard to read on the logo, but they were SM series.
Here is the cap that triggered all this. Pretty sure my ruler should be sitting flat on top of this. Its a snap in cap with a plastic top. Not sure how much more before this thing was going to crack open. Unless this is just how Samhwa made their caps. But I doubt that.
Thanks!
So out the logic board came, and now I'm looking to recap the whole thing just to be safe. Unfortunately, Apple didn't believe in board level repairs, so schematics are non existent. I had to go through and inventory it manually, and have no idea where in the circuit any of these really are to even guess what type I should replace them with.
The majority of the caps appear to be some purple wrapped Samhwa caps? Which I had never heard of. Some have series markings on them (mostly SA, a couple GA's, an HR, and a couple with no series markings. I can't seem to find much info on them. Am I OK to just really use most any series from the trusted brands (Panny, Nichicon, UCC)? Should I stick to general purpose, or go low ESR/High frequency?
There was also a yellow sleeved Samhwa RM series cap. I think that means its a special "low leakage", cap correct? I think the main modern replacement for that is the Nichicon KL series?
There was also a handful of caps that at first I thought were UCC caps, based on the logo. But it looks like they say Samyoung, or maybe even Samsung inside the logo? The printing is kind of hard to read on the logo, but they were SM series.
Here is the cap that triggered all this. Pretty sure my ruler should be sitting flat on top of this. Its a snap in cap with a plastic top. Not sure how much more before this thing was going to crack open. Unless this is just how Samhwa made their caps. But I doubt that.
Thanks!
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