286 motherboard repair \ VOGONS

286 motherboard repair

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First post, by Bakersor

Posted on 2024-05-27, 17:09

Bakersor Offline

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Rank: Newbie
Posts: 23
Joined: 2018-12-22, 14:37

Hi guys,
Found this motherboard in the wild and sadly the battery leaked. I removed the PLCC CPU socket because the contacts were corroded and broken; ordered a new one. I used vinegar to neutralize the battery juice.
Traces in the area have a brownish color. Do i need to remove the remaining components and clean the solder mask, tin the traces? Or does it look good to you?

The attachment IMG_20240527_193116.jpg is no longer available

Sorry for my low quality photo and thank you in advance.

Reply 1 of 2, by dominusprog

Posted on 2024-05-27, 17:53

dominusprog Offline

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Rank: Member
Posts: 495
Joined: 2022-07-02, 00:52
Location: Innsmouth

First sand them with a extra fine sand paper (180-220) and then tin them with desoldering wick.

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Reply 2 of 2, by majestyk

Posted on 2024-05-27, 18:29

majestyk Offline

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Rank: Oldbie
Posts: 1437
Joined: 2020-12-04, 09:13

I´s suggest a fine glass fiber pen for removing the corrosion and sclerotic solder resist mask.
Then tin the traces with a good(!) flux and no wick. The traces have already become thinner due to the corrosion and cleaning, so a regular tinning in it´s "natural" thickness is an improvement and desired here.

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