| 摘要 |
PURPOSE:To eliminate the plant adjustment of an adjustable resistor attached on an automobile amplifier by enabling the resistance value which indicates the resistance value in response to the opening of a mix door, to be corrected based on the maximum and the minimum openings of the mix door by outside information. CONSTITUTION:A variable resistor C which indicates the resistance value in response to the opening of a mix door, is arranged on a drive means B of the mix door A. And a command correction detecting means D which directs a command to correct the resistance value of the above mentioned variable resistor C in response to the maximum and the minimum openings of the mix door by outside information, is also arranged. When the command for correction is directed from the means D, the maximum and minimum values of the variable resistor C in response to the maximum and minimum openings of the door A are corrected and stored in a memory E. Then the resistance value of the variable resistor C is corrected by a correction means F based on the output from the memory means E, subsequently, the present opening of the mix door is determined based on the corrected resistance value allowing the drive means B to be controlled based on deviations from the necessary opening. |
