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一台松下2140彩电一开机音量就最大,无论按声音遥控或面板上音量+、-按钮,只见屏幕上的数字从0～64变化而音量毫无变化。经查明是微处理器MN15281直流音量控制端已损坏,其它功能均正常,MN15281价格不低,而且不易购得。测量MN15281的第(16)脚电压,当控制音量数字从0～64变化时,其电压
A Panasonic 2140 color TV boot volume is the largest, no matter by the sound remote control or panel volume +, - button, I saw the number on the screen changes from 0 to 64 and the volume has not changed. After ascertaining the microprocessor MN15281 DC volume control terminal is damaged, other functions are normal, MN15281 price is not low, and not easy to buy. Measuring MN15281 (16) pin voltage, when the control volume digital from 0 to 64 changes, the voltage