| 摘要 |
PURPOSE:To facilitate the preset operation and to improve the sense of high- class external appearance by presetting the equalizer characteristic at application of power with a control data at poweroff and applying the said present with a standard control data if the control data is in error. CONSTITUTION:The state of preset keys 25g-25k just before power is interrupted is stored in a prescribed memory area of a RAM 23. Moreover, other ROM is provided to a ROM 22 of a microcomputer 20 and a standard preset data is stored. Then a control data stored in the RAM 23 is checked at application of power. If the data is a meaningless data, the standard control data stored in the ROM is read and written in the preset memory area of the RAM 23. Thus, the equalizer characteristic is always kept to a prescribed state and the reproduction of an abnormal sound is prevented. |
