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StevieGoodwin
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Hi guys, I'm new here to this forum.

Post by StevieGoodwin » Mon Aug 13, 2018 6:01 pm

Hi everyone, I'm a new user and i'm also new here. Can i ask anything about NES or SNES repairs or something? I just gotten a SNES which had a screw missing to the 7805 and i added a screw and all is good now. How long will it last with the screw in there? Would the console die without the screw in the 7805?

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Fisher
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Post by Fisher » Mon Aug 13, 2018 6:58 pm

I don't think it would die that easy.
But I think the 7805 would certainly become a bit hotter without the screw, correct?

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koitsu
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Post by koitsu » Tue Aug 14, 2018 12:27 am

The 7805 looks to be a +5V regulator (i.e. a VRM). These tend to get extremely hot, especially in such limited form factor (size). The reason it's screwed down is to help dissipate heat through the aluminium/metal heat sink. Example photo (ignore the capacitor, it's unrelated to the question): https://console5.com/techwiki/images/th ... Output.jpg

Thus: is the screw important? I would err on the side of caution and say yes. Different SNES revisions/models have this done differently. If the VRM is also soldered or attached to the heat sink directly, then it might be OK (but the more heat dissipation/transfer the better!). If it's one where it's only in contact to the heat sink using the screw, then yes, I would say it's incredibly important.

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TmEE
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Re: Hi guys, I'm new here to this forum.

Post by TmEE » Tue Aug 14, 2018 4:12 am

You definitely need that screw, I think it is M2 type but I'm not completely sure.

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