| 摘要 |
PROBLEM TO BE SOLVED: To suppress a manufacture cost of a video door-phone system and to enhance the reliability such as component mount performance, electric performance and maintainability by minimizing number of connector leads interconnecting an operating board and a control board. SOLUTION: A monitor button 43 that is operated to activate a camera 12 of a slave set 1 and a monitor 2c of a master set 2 respectively, a panning tilt button 44 that is operated to apply panning tilt control to a visual direction of the camera in horizontal and vertical directions, an electric lock button 45 that is operated lock/unlock an electric lock 3a of an entrance door 8 are mounted on an operation board 2b, a data CPU 46 detects the operation of the buttons, a control signal that is detection data is converted into a cordless signal consisting of an infrared ray via a cordless signal transmission circuit 47 and sent to a cordless signal reception circuit 39 mounted on a control board 2a so as to minimize number of connector leads L11 interconnecting the control board and the operation board only two power supply lines.
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