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一、自白
早在两年前就有将PHILIP CDM4的驱动的主板301改制作成有数字输出的cd机的想法了,以前用洞洞板在7310后加了saa7220接数字输出,因效果不理想就扼置下来,直到今年头从别人手中转让了一套沙冰的伺服板后又有了这种冲动,原板子上有bug,拿到手后,借着以前对301板的分析研究和改装,它的电路有小小了解,很快就把板中的bug修改过来了,使其能正常工作,因工作关系本人这一年多来长期出差在外,所以机芯和板子一直是裸体放着,直到上个月得到小明赠送的1541板及一对1541R1和1700提供的不锈钢按键后,才有给M4穿上衣服的决心。
二、制作
(1)、机箱改制:为了加工方便,买了一个纯后级机箱对其面板和后板进行改装,采用中置式出仓,按键用1700提供的不锈钢按键。<img src="attachments/dvbbs/2005-11/200511261679238.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/2005-11/200511261679238.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />图3、<img src="attachments/dvbbs/2005-11/2005112616749204.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/2005-11/2005112616749204.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />图4、<img src="attachments/dvbbs/2005-11/2005112616757113.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/2005-11/2005112616757113.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />图5
(2)伺服板改制:
原沙冰板上没有整流和稳压电源部分,需外接稳压电源,原作者在设计板时已溶入了各IC分开供电的思维,改制比较方便,于是一不做两不休,又对PCB板动了小手术,使各IC分别供电,自已做了几组稳压电源接入,让其工作更稳定、相互间干扰更小,对比采用原来板上的供电模式,无论声场、细节、高低频延伸各方面都有明显提高,背景也更加宁静;同时也把原板上的数字输出部分和晶振部分也废了,接上在坛上购买的数字输出板和时钟板,这两件DD的素质和效果早有定论,在此不再多言了。
<img src="attachments/dvbbs/2005-11/20051126235913428.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/2005-11/20051126235913428.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
图6
<img src="attachments/dvbbs/2005-11/20051126235924899.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/2005-11/20051126235924899.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
图7<img src="attachments/dvbbs/2005-11/2005112623593376.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/2005-11/2005112623593376.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="attachments/dvbbs/2005-11/200511270534354.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/2005-11/200511270534354.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />图16<img src="attachments/dvbbs/2005-11/20051127054595.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/2005-11/20051127054595.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />图17<img src="attachments/dvbbs/2005-11/200511270612487.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/2005-11/200511270612487.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />图18
(3)新做的显示、控制板:
配套的显示、控制板因尺寸不适合机箱面板,于是自已动手用洞洞板焊了一块显示、控制板,唉,那廉价的粪纸板,焊完后板有点弯曲,各控制键不在同一水平面,又要对板和有些按键进行垫平才能使轻触开关按得自如。
<img src="attachments/dvbbs/2005-11/20051126235942909.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/2005-11/20051126235942909.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="attachments/dvbbs/2005-11/20051126235952783.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/2005-11/20051126235952783.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
(4)解码板:
机内解码用明9002的1541板,原来的板是一声道用一块PCB板,一块板用两块1541并联作一声道输出,该板素质不错,只是电源设计有点简单,以后有时间对板上的供电部分加强可能会更好。我只用一块PCB板,把它改成作两声道输出,直接在7220后取信号接入1541,让它们老爷级的IC相互配合,天作之配。
<img src="attachments/dvbbs/2005-11/20051127021108.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/2005-11/20051127021108.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />图11<img src="attachments/dvbbs/2005-11/200511270215548.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/2005-11/200511270215548.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
全机用两只环牛,M4部分用一只,1541解码部分用一只。在安装时发现机芯的平衡、防振无伦采用什么安装方式都非常重要。
<img src="attachments/dvbbs/2005-11/200511270222548.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/2005-11/200511270222548.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />图13<img src="attachments/dvbbs/2005-11/200511270230629.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/2005-11/200511270230629.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />图14<img src="attachments/dvbbs/2005-11/20051127045817.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/2005-11/20051127045817.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />图15
三、后言
装机完毕后,用表测1541输出竞有几伏直流电压,征求小明意见后加了输出电容,接好线后,用机内1541解码输出到天龙AV功放和荷兰产DRIADE牌落地音箱(采用ETON喇叭单元)试听,效果不错.声音表现平衡顺滑,深度和延伸度都较好,以后等机子稳定了再对它进行调校,应该还会更好表现,到时再外接解码器和找几台机子回来详细比较。。。。。。
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DIY M4 CD机(是否能参赛?)
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DIY M4 CD机(是否能参赛?)
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