Even before a communication partner device is incorporated into an operating state, an abnormal communication partner device can be detected, so that it is possible to prevent an abnormal communication partner device from affecting communications with other devices, whereby stable communications can be achieved. The disk device is provided with: a pick arm 130 which swings and inserts a drive unit for playing a disk D into a space created by splitting a plurality of trays 250; and a loading arm 256 which can move between a leading position for abutting on the disk D insertedejected with respect to the tray 250 and leading the disk D, and a withdrawing position for withdrawing from the disk to be played. The contents of memory can be obtained from an end user application which may supply the position data to the printing subsystem in a print data stream. The system may thereby reduce or eliminate the need for post processing by transcriptionists or dictation authors. The fins includes a plurality of first fins extending from a first face of the base of the heat sink, and second fins extending from a second face of the base.