Patent ID: 6683742
Filing Date: 2004-01-27
Classification: G11B

Abstract:
A magnetic tape drive comprising:a brake mechanism section which can transfer a state of a reel table from a non-brake state to a brake state by using an electric power that remains after a start of a power failure of a commercial power source; a first power failure detecting section which, when a power failure of said commercial power source is detected, transmits a first power failure detection signal; a controlling section which, when the first power failure detection signal is transmitted in a fast-forwarding state or a rewinding state, transfers the non-brake state of said brake mechanism section to the brake state; and a switching power source which, when a switching circuit for switching a current flowing through a primary coil of a transformer is in an off state, takes out an output from a secondary coil of said transformer, wherein said first power failure detecting section transmits the first power failure detection signal on the basis of a voltage of said secondary coil of said transformer when said switching circuit is in an on state.