| 摘要 |
<P>PROBLEM TO BE SOLVED: To facilitate maintenance and inspection works of the main circuit part, while securing the degree of freedom in arranging the main circuit part. <P>SOLUTION: The screwing of a keyboard part 41 to keyboard unit holding parts 16La and 16Ra and the locking of the keyboard part 41 with the main circuit part 40 are released, and the front part 41b of the keyboard part 41 is lifted so as to be opened. The front part 41b is supported by two support bars 44 on upper front half part frames 12L and 12R. The rear end face 41ca of the keyboard part 41 abuts against and engaged with the rear upper end parts 47La and 47Ra of L-shaped metal parts 47L and 47R at the abutment point P1, and the lower surfaces of brim parts 43R and 43L come close to the rear upper end parts of both frame bodies RFM and LFM at the point P2. The maintenance and the inspection of the circuit and a parts group 46 in the main circuit part 40 are performed from an opening OP generated between the keyboard part 41 and the main circuit part 40. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
