| 摘要 |
PURPOSE: A transistor separation preventing device for a printing circuit board is provided to enhance the durability and reliability of a transistor by preventing the circuit elements from the excessive power supply. CONSTITUTION: The PCB of a transistor separation preventing device comprises a locking device which operates to fix in a state of the PCB installed in the shelf(28); a power supplying part(20) which supplies power to the PCB; a power supply sensing part(6,14) which sensors the power supply and by which the excessive power supply is prevented; and a locking operation part(8, 16) which prevents the PCB separating from the shelf. the device further comprises a solenoid which makes the moving iron core to move in reciprocation according to the operation signal of the locking operation part(8, 16).
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