0017 Yihua 938d Destructive teardown - Soldering Tweezers

Published at : 23 Dec 2025

Pete is tidying up the Make or Repair lab and decides to tear-down the Yihua 938D that he disliked so much when reviewing desoldering tweezers. Look out for the worst soldered connection ever - unless you know better...
🔸See then compared to pace in https://youtu.be/7Rrozu_VVEo

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Datasheets
S3F94C4EZZ Processor - https://pdf1.alldatasheet.com/datasheet-pdf/view/1178967/ZILOG/S3F94C4EZZ-DK94.html
CT3041 Zero crossing Photo-triac https://www.alldatasheet.com/datasheet-pdf/pdf/821613/CTMICRO/CT3041.html
BT137-600E Triac - https://www.mouser.com/catalog/specsheets/bt137-600e.pdf