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Comment on After 5 years of non use, what precautions should I take before turning on a Commodore CBM 3016?

Electrolytic capacitors loose some of their passivation layer. This needs to be present to make them DC insulators. Without it, they are a dead short. So while it reforms, they are resistors and heat up. This can be a problem. To allow the heat to dissipate and the passivation layer form properly perhaps try this: Plug it in for a moment only, repeat 3 times. Turn on and right off again and repeat 3 times.

If you see any damage capacitors replace them. Generally replacing all electrolytic capacitors is a good idea. Essentially those pesky tantalum ones.

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Mr_Mofu@lemmy.blahaj.zone ⁨1⁩ ⁨year⁩ ago
Hm I see. So plug in for around 3 seconds and then unplug again 3x. Then turn it on and instantly off again, also 3x. How long should I run her for afterwards? Only like a Minute to ease her in or go all in?

And once she’s home work on replacing all electrolytic Capacitors, sounds good!

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- Eheran@lemmy.world ⁨1⁩ ⁨year⁩ ago
  If you replace them anyway… just do only that. To test functionality it could indeed help avoid explosions.
  
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  - Mr_Mofu@lemmy.blahaj.zone ⁨1⁩ ⁨year⁩ ago
    Havent replaced parts like these or soldered things before, so it’ll definetly be interessting. Though out of curiousity, if the Capacitors do explode, would they damage other electronics in the system or would it only be limited to itself?
    
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    Eheran@lemmy.world ⁨1⁩ ⁨year⁩ ago
    The explosion should not damage anything short term. Leaving the residue will cause a lot of corrosion long term. If you get into soldering, make sure to buy proper flux. It makes such a huge difference. Also not the cheapest iron. I would recommend a TS80P. For removing parts, if you do that more than a few times, get an automatic solder sucker, cheap ones should do. Otherwise use the iron with extra solder at high heat and perhaps 3 or 4 hands.
    
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- gnygnygny@lemm.ee ⁨1⁩ ⁨year⁩ ago
  Ans dont forger that must be done under a hot shower.
  
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Scubus@sh.itjust.works ⁨1⁩ ⁨year⁩ ago
Don’t know the chemistry behind that, but if it’s start to read/write info could that not cause corruption? It just seems like your bios and OS would be unimpressed

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- Eheran@lemmy.world ⁨1⁩ ⁨year⁩ ago
  What do you mean? Electrolytic caps should only be used for power rails, them failing means the DC is either absent, at the wrong level and/or with excessive AC components.
  
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