MOUNTING STRUCTURE OF CIRCUIT-BOARD PACKAGE

PURPOSE:To take out a circuit-board package mounted inside while an electronic-circuit unit is inserted into and mounted in a rack regarding the mounting structure of the circuit-board package in the electronic-circuit unit inserted into and mounted in the rack. CONSTITUTION:An opening hole 2a is made on a surface panel 2 for an electronic-circuit unit 1. The title structure is constituted as the following: a lid plate 3 which is screwed, so as to be freely attachable and detachable, to a screw hole 2a-1 made near the opening hole and which closes the opening hole; a board 4 fixed to and installed on the inside of the lid plate; and a circuit- board package 5 in which a cutout hole 4a-1 corresponding to the screw hole is formed in an attachment part 4a formed at the rear end part of the board and which is mounted on the face of the board. When the lid plate is detached, the circuit-board package is taken out together with the board through the opening hole, the attachment part of the board attached to the screw hole on the surface panel. A maintenance operation and an inspection operation are executed.