| 摘要 |
<p>PURPOSE:To confirm the usable state of electronic equipment, by connecting contact circuits, which are closed when plural function switches of the electronic equipments are in initial states, respectively, to a lamp which is to turn on. CONSTITUTION:Switches S1, S2 and S3 of electronic equipment are connected to a lamp 1 in series; the S1 is switched between mpdes Remote and Local, the S2 between ON-Line and OFF-Line, and the S3 between channels A(CHA) and B(CHB). When the switches S1, S2 and S3 are closed for the Remote, ON-line and CHA, the lamp 1 turns on. Therefore, when the equipment is used with the S1 placed at the side Local, the lamp 1 never turns on unless the S1 is returned to the initial position Remote after operation Local, and consequently the initial states of all the switches S1-S3 are confirmed.</p> |
