On this video I'll show you how to perform the recommended factory modification of your Sequre S99 soldering iron.
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Sequre official bulletin:
https://sequremall.com/blogs/sequre-product-firmware-upgrade/s99-v1-07-firmware-upgrade
Sequre S99 review video: https://youtu.be/WSCrB5AqH1s
0:00 Intro
02:18 Opening the iron
03:35 performing the modification
06:17 Final test and considerations
The tweezers I am using
https://www.aliexpress.com/item/4000961620651.html