沙冰的cdm4板有谁做好了？(本贴只是讨论纯技术问题）
请各位网友不要误解。我的做到这样了，但显示板的数码管最后一位不能正常显示，3、7、9均多一划，左下角的一划。请指点。
还有我发现板的标示错误较多，特别是电容。4.7k电位器的连线是错的和图纸不符，5.6
m电阻应为5.6欧。板的安装孔位也有问题。
我现在舍不得拆我的原板，做好的朋友请交流。
我的依据
<img src="attachments/dvbbs/2004-10/20041024171851103.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/2004-10/20041024171851103.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /><img src="attachments/dvbbs/2004-10/20041024171940429.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/2004-10/20041024171940429.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
我的焊功，请沙冰过目
关于数码管的问题，我怀疑是数码管性能不良或其他问题。4.7k电位器书上是这样说的，4.7k电位器与220欧电阻串联后与光敏二极管并联调节受光灵敏度，可你的板上却不是。<img src="attachments/dvbbs/2004-10/2004102417163495.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/2004-10/2004102417163495.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /><img src="attachments/dvbbs/2004-10/20041024171623663.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/2004-10/20041024171623663.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
老大
你肯定把现线焊在一起了4.7k电位器的连线一点错也没有只是把100欧的电阻换了个地方还有5.6M的电阻你看着办吧我不想说那么多了GAKMTER老大你检查一下最后的2笔的线路肯定是给你焊在一起了
我的板子只焊了一半，零件已基本齐了，就是没时间啊
老兄的板子焊的不错，挺漂亮显示的最后一位就是这图所示，最后一位是3字。
。<img src="attachments/dvbbs/2004-10/20041023234054333.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/2004-10/20041023234054333.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />11.2896MHz?
你的晶振没有起振
飘老大,为什么我的CDM4不停转,无法识别盘片哪?
你看看反面的贴片电容…………没有此电容
CDM4不可能正常工作我两块不同CDM4板,都无这电容.
看图:沙兵老大看一下
以下是引用gyxxyg在2004-11-2 21:33:00的发言：找到原因了，我的4.7K电位器接错了,转是转起来了,但停不下来,直到显示ERR为止,经过对比发现,TDA8808的3脚,也就是HF<I></I> OUT端的直流电位不对,应该在2.5V左右,可我的板上很小,SAA7310的24脚也就是电机速度控制一直处于高电平,致使电机不停旋转,而正常情况下应该从高电平降下来,会不会是TDA8808的问题哪?
请ylc看图470p，221p，和图纸上的一样。
刚照的。最近太忙，天天加班，就等你们的好消息了。<img src="attachments/dvbbs/2004-11/200411305155867.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/2004-11/200411305155867.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /><img src="attachments/dvbbs/2004-11/20041130529966.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/2004-11/20041130529966.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
我的图纸上就是5.6M
不对呀,怎么从数据上看2脚应该是正电源,而4脚应该是负电源电源供电+10V,-5V属偏置电压，5.6Ω应是5.6M。
以下是引用gyxxyg在2004-11-2 22:11:00的发言：好象应该是双电源供电的
我手头的图纸这个位置标的是-10V
看上图，58搂的是你图纸像片啊！
以下是引用gyxxyg在2004-11-2 22:11:00的发言：不对吧,我手头的图纸标的也是-10V的啊!
好象应该是双电源供电的
TCA0372电路反复查资料是+10V供电的。
以下是引用ylc在2004-11-2 21:17:00的发言：两图如红圈中，TCA372DP2此点究竟是+10V还是-10V？CDM4PCB此点是-10V。
呵呵！TCA0372有无击穿可能？