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再给大家看我自己MO的MD的情况吧!
最近一直还在MO,换了机器上的一路电源,比较不同的电源的差别!还来不及传到我自己的贴子上去,先来两张给大家看看我MO电源的情况吧!
想好听,就得走极端![em11][em11]
我MO的MD主板的背后,看我用的电容!
<img src="attachments/dvbbs/2005-5/2005530224220508.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/2005-5/2005530224220508.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
总电源,还有给运放供电的部分
<img src="attachments/dvbbs/2005-5/200553022439111.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/2005-5/200553022439111.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
这些100U的是贴在运放根部的!
<img src="attachments/dvbbs/2005-5/2005530224357763.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/2005-5/2005530224357763.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
有一部分接地线分开来换导线接过
<img src="attachments/dvbbs/2005-5/2005530224449943.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/2005-5/2005530224449943.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
看中心两个大电容等一大堆电容加强的这一路5V的就是供电给MD机芯的,我特别加强了,事实上,原来的设计最强的也是这一路,现在我在换不同的电源调整管实验,现在用上了LM2575自己做的开关电源!实际证明,开关电源用得好的话,远远强过模拟伺服电源!!!但是现在的体积太大了,还没有想好怎么装进去!晚些做好了我再发图到我的贴子里![em11]
<img src="attachments/dvbbs/2005-5/2005530224919355.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/2005-5/2005530224919355.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
给系统的微控制器还有它的晶振供电的,有另一颗7805供过来,我用上了另一种性能稍差些的主板电容
<img src="attachments/dvbbs/2005-5/200553022510413.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/2005-5/200553022510413.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
刚才大家看到的特别加强的给MD机芯的那一路5V电源,大家看到的这两个电容的后面就是扁平电缆,这儿还用上了金字的三洋OS!为了加强,还用了一个白字的OS,都是100U的!在板子的另一面,也就是正面,还有2200U的主板电容!总共这一路的电容量都有10000U以上了!
但是,现在我改了LM2575的开关电源以后,用得更加夸张!呵呵!4700U的主板电容又加了4个 !现在的音色真是非常好!就是装不下了!头痛ING![em11]
<img src="attachments/dvbbs/2005-5/200553022578651.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/2005-5/200553022578651.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
最后请大家看我还在试的LM2575开关电源!事实证明,它远远胜过模拟伺服电源!请注意我这儿用的电感,总共用了六级,不用的话声音模糊,比不过原来机器上的TL431+电源调整管的方案!加了三级以后就远远胜出了!我是先串电感然后再上电容的,就是在每串进去的一级电感上都再加上一只4700U/6。3V或2200U/6。3V的主板电容!顺便我也好试一下这两种不同的主板电容的音色!
事实证明,那种绿皮的4700U的低音沉,黑皮和深绿色皮的2200U的就中一点,提升了低音,高频也不错!(请参见我上面发的给大家介绍的这两种电容的图片)[em11]
最后两个都用上了,平均一下!呵呵[em11][em11]
现在效果是很满意了!可是怎么装进去呢?头痛ING!
<img src="attachments/dvbbs/2005-5/200553023189631.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/2005-5/200553023189631.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
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