How to replace KF1921 to repair Whatsminer M21S lower hashrate fault - ZMRC Whatsminer repair course

Soldering tips for Whatsminer KF1921 asic chip. Correctly soldering ASIC chips is one of an important skills for repairing hash boards. Senior maintenance masters from the ZMRC miner repair training academy provide free guidance on how to correctly solder the Whatsminer M21S hash board KF1921 chip. There are no shortcuts in welding technology. It is a process that takes time and effort. If we don’t practice soldering, even offline training instructors will not be able to help you master the soldering method correctly. Learn more details: Or contact us: Sales Whatsapp 8619115061759 Technical Whatsapp 8619123969124 Related Products: 1. UT890D intelligent digital multimeter: 2. Low temperature solder paste: 3. Whatsminer KF1921 Tin Tool: htt