不错
以下是引用Saxophone在2005-8-31 15:34:00的发言：
我想有个家，一个不需要多大的地方。。。
<img src="attachments/dvbbs/2005-8/2005831153333917.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-8/2005831153333917.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
电机会不会超负荷工作???........
好！
工艺很不错嘛，水平强。。。总结
晶振部分的打磨得到的提升是最大的，最大感觉就是以前没有的细节一下子多了起来。而数字输出的Re-Clock我个人也是感觉有比较大的提升，但同听的朋友却认为原来的数字输出更为好听。。。其实正如我前面所说的，这些都是基础性的加强，做了一定会有一定好处的。
我在试验的时候还做过加IC退耦电容以及更换电路板上的电容。IC加退耦，感觉效果不明显，而且工作烦多。。。更换电容则个人觉得没有必要，从我在原来电路板上拆下来的电容来看，平均容量还大约有原来的八成左右，当然可能是我买到的光驱是这样而已。而且更换电容后，感觉好像不是原来的那杯茶了。所以后来我在外加的两路电源时也用来了板子上同样的红宝，同样的型号。
不把试验时的失败计算在内，打磨一共花了大约300元。打磨后的NEC的确有一定的水平，但还是不能说是山鸡变凤凰。而且NEC的板子是比较容易坏的，花的钱不算太多，但打磨的难度却是不少。有感于此，希望本文能给手头上已经有NEC的兄弟一点帮助，但也请不要完全按着来磨。动手前多看看其它人的做法，把雨衣MM的NEC线路图下来好好看看，多多动脑子想想再动手。总之胆大心细手够定就应该没有问题了。
在这最后感谢各位，特别感谢帮忙做CD镇的吻子兄，提供电源建议的AMK5兄，提供CD机打磨经验的HQ版。。。。
补回一张，刚才忘记了。。。
<img src="attachments/dvbbs/2005-8/2005831153429767.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-8/2005831153429767.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />可惜没有办法解决外壳问题
我想有个家，一个不需要多大的地方。。。<img src="attachments/dvbbs/2005-8/2005831153333917.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-8/2005831153333917.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
洞洞板
<img src="attachments/dvbbs/2005-8/2005831153125781.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-8/2005831153125781.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />数字输出打磨
也就是Re-Clock，其实质就是以晶振信号为基准，通过D触发器对数字输出信号作一整形。我用了一片M记的74F74作触发器，拆机的东芝74HCU04作数字信号输入输出的缓冲。这是我的连接图。
<img src="attachments/dvbbs/2005-8/2005831153049284.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-8/2005831153049284.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
屏蔽接地
把IC帖上铜皮，找回该IC的地脚接地。这一步做不做就见人见智了，个人感觉做了，背景更为宁静。<img src="attachments/dvbbs/2005-8/2005831152952531.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-8/2005831152952531.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
亮晶晶的33.8
<img src="attachments/dvbbs/2005-8/2005831152917828.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-8/2005831152917828.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />晶振部分打磨
把原来的50MHZ和33MHZ的二脚晶振拆除，只留下原来33MHZ输出的一只1M欧的贴片电阻，把其它的几片贴片拆了。就好位置，在原来的电路板上按论坛的10PPM四脚晶振钻孔、安装，用第四路+5V给晶振供电，并加上退耦电容。把原来的74HCU04拆下，换成论坛的74VH04。把第九脚和第十脚的连线断开，从第十脚引出晶振信号接到R825这个100欧的电阻上。把第九脚和第十一脚连接，从第第八脚引出另一个晶振信号以作数字输出的Re-Clock。把一脚和三脚接地以减少干扰。
<img src="attachments/dvbbs/2005-8/2005831152846728.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-8/2005831152846728.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
后面
<img src="attachments/dvbbs/2005-8/2005831152747941.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-8/2005831152747941.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />电源部分接口的打磨
我自己的电源分成四路：原来的+12V；原来的+5V；给原来用7805供电的+5V；给晶振独立供电的+5V。在原来的电源接口部分加装了一个四心接口，仿照NEC原来的电源LC网络加装了红宝电容和电感。<img src="attachments/dvbbs/2005-8/2005831152713448.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-8/2005831152713448.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
拆拆拆
<img src="attachments/dvbbs/2005-8/2005831152528877.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-8/2005831152528877.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />跟着就是电路板的打磨了
先是把作为转盘没有用的东东拆除。我自己就成功把SCSI接口，音频接口以及部分IC拆掉，保留前面的耳机插头和音量调节只是为了美观。成功拆掉的IC有：IC717:74HC00，IC305、IC306:4560，IC101:BH959FP，IC128、IC129:NN514256J，IC302:CXD2559Q。<img src="attachments/dvbbs/2005-8/2005831152458384.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-8/2005831152458384.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />