IC card type

Korean-made IC card type electronic lock PM640, lock defect inspection due to dead battery

2024-01-30

``The locking/unlocking operation of the IC card-type electronic lock is unstable.'' We had rushed to this property for repairs last time. It was an electronic lock whose manufacturer's name was unknown, and it malfunctioned because the circuit board was nearly submerged in water and had progressed to corrosion. As an emergency measure, we cleaned a part of the board […]

General

Mysterious IC card electronic lock PM640, malfunction repair of unknown manufacturer

2022-05-20

``This morning it suddenly stopped working, so I would like to have it checked.'' It was an electronic lock (IC card lock) that I had never seen before. There are no markings or instructions. (Maybe made in Korea?) I couldn't even search on the web. Normal operation is to press the button and switch the card key […]