| 摘要 |
<p>PROBLEM TO BE SOLVED: To extremely easily execute the replacing work of ROMs or the like. SOLUTION: The controller 4 is provided with a casing 41 having an aperture part on its front face, a front panel 43 for blocking the aperture part of the casing 41 and an arithmetic processing unit(APU) 100 to be stored in the casing 41 close to the rear face of the panel 43. The APU 100 is provided with a 1st arithmetic processing circuit 1, a 2nd arithmetic processing circuit 2, a 1st printed board on which the circuit 1 is to be loaded, a 2nd printed board on which the circuit 2 is to be loaded, a holding plate 9 capable of holding the 1st and 2nd printed boards so that respective component faces 6a, 7a become front-and-rear positional relation and allowed to be rotated by a hinge 8, and a connector for mutually connecting the circuits 1, 2. When the front panel 43 is detached, the component surface 6a of the 1st printed board is turned to the front, and when the plate 9 is turned from the state, the component face 7a of the 2nd printed board is exposed.</p> |
