| 摘要 |
PURPOSE:To simultaneously operate equipments different in operation mode by providing a preset switch to select potentials from plural potential sources regardlessly of a selection point of a mode change-over switch and to supply said potential as a mode setting potential. CONSTITUTION:In case the preset switches S11-S22 are in positions shown in the figure and the mode change-over switch M1 is in its A-side, if an operational button belonging to a first operational button group is operated, a first audio equipment is operated, but if an operational button belonging to a second operational button group is operated, a second audio equipment is operated. When the mode change-over switch M1 is turned to V-side, if an operational button belonging to the first group is operated, a first video equipment is operated, and if an operational button belonging to the second group is operated, the second audio equipment is operated.
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