Failure Analysis of Intelligent Door Lock Master Control Chip

Abstract

Abstract In recent years, smart door locks having password keyboards, fingerprint recognition and communicating function have seen explosive growth. A large number of enterprises engaged in the manufacture of the intelligent door locks, followed by the associated after-sales problems, and the product without power, no reaction phenomenon caused by the failure of master control chip is relatively common, which greatly affects the user experience. In this paper, a mainstream smart door lock products on the market as the research object, a series of failure analysis and root cause search were executed to find the reasons of failure. The research shows that the main reason for the non-power supply and non-response of the intelligent door lock after sale is the fault of the main control chip. The main control chip fails due to the lack of electrostatic protection, which is directly related to the improper production and assembly process.