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一、ONE797CD机改装 ONE797CD机是广东南海凌骏公司1994年底推出的一款新产品,采用三洋机芯及集成电路,为16比特2倍取样设计,机内空间宽敞。DSP电路采用LC7861N,D/A转换电路为LC78815M,滤波运放为A6458,变压器功率仅为12W,经7808稳压后的单电源供全机工作,主滤波电容为3300μ/25V,简单二极管稳压输出的-28V供显示屏。虽然D/A电路较新,但LC7861性能一般,加上简化的电源设计,一般的用料,整机性能一般。选配的VCD板自带音频DAC电路,D/A为PCM1712U,是一20BIT8倍取样电路,性能不错,可惜低通滤
One, ONE797CD machine modification ONE797CD machine is South China Sea Ling Chun company introduced a new product by the end of 1994, using Sanyo movement and integrated circuits, sampling for the 16-bit 2 times, the machine room spacious. DSP circuit LC7861N, D / A converter circuit LC78815M, filter op amp A6458, the transformer power is only 12W, 7808 regulated single power supply for the whole work, the main filter capacitor 3300μ / 25V, a simple diode regulator Output of -28V for display. Although the D / A circuit is newer, but LC7861 general performance, coupled with simplified power supply design, general materials, machine performance in general. Optional VCD board comes with audio DAC circuit, D / A is PCM1712U, is a 20BIT8 times sampling circuit, good performance, but unfortunately low-pass filter