Abstract: The invention provides a printed circuit board capable of preventing an electronic component from tilting or uplifting without adopting special structures in an existing electronic component. The printed circuit board has an engagement portion and terminal holes and for mounting an electronic component, comprising narrowed portions and having substantially the same width as the mounting leg portions and connecting terminals of the electronic component, and guidance portions having a width wider than the narrowed portion, wherein the mounting leg portions and connecting terminals are inserted to the guidance portion, and the electronic component is moved via sliding motion, by which the mounting leg portions and the connecting terminals are supported tightly in the narrowed portion. Thus, it becomes possible to prevent the displacement or tilt of the electronic component.

Abstract: The invention provides a disk reproducing apparatus and a disk reproducing method capable of reducing constrained reproduction by reproducing another type of reproducible data for the portion in which the designated type of data cannot be reproduced. In step S250, it is determined whether there is an error in the reproducing audio data or not, and if there is an error in the reproducing audio data, the procedure advances to step S260. In step S260, it is determined whether there are errors in all the audio data, and if there are errors in all the data, the procedure advances to step S270, whereas if not, the procedure advances to step S310. In step S270, it is determined that audio is not to be output. In step S310 and onward, other reproducible data are reproduced.

Abstract: An alignment mark for aligning a resist film and a silk film relative to a printed circuit board is used as a reference mark based on which a position of an electronic component on the printed circuit board is acquired when a component mounting machine mounts the electronic component on the printed circuit board. This makes it unnecessary to additionally provide a board recognition mark and an individual recognition mark, thereby making it possible to effectively use an area of the printed circuit board. In addition, since the number of marks to be recognized is decreased, a recognition processing is reduced. Accordingly, mounting time and a mounting program can be reduced, and a manufacturing cost of the printed circuit board can be reduced.