有摩过CD机晶振的吗?

su7

小钳子

以下是引用雨衣妹妹在2004-10-29 18:18:00的发言：
装的DX们说说看。

他竟然现在还没消息!

su7

以下是引用HQ在2004-10-28 19:32:00的发言：
要多少米?

记得是500米

雨衣妹妹

装的DX们说说看。

小鬼头

以下是引用小鬼头在2004-10-29 9:30:00的发言：
不是装上去嘛。。。

别的。。。手头上没有，看过别人的，都装在脑袋里[em06]

下面是DIYAUDIO坛上一个网友回应楼主关于怎样摩NAD C541 CD机的帖子，大意是：改善音质的摩改主要有两项，第一项是换高品质的晶振，第二项是将模拟部分的电容、IC、电阻和电源升级。除此之外，你可以做其它想做的，比如换个好得多的光头机芯、更好的机芯座。。。

janusz []
diyAudio Member

Offline
Registered: Oct 2004
Location: Perth, Western Australia


NAD C541i modification  Post #2  
Hi Mosez,

I have a NAD C541i too and one day I'll likely do some modifications to it. As I have never ever done any mods to a CD player it will be my first and it will be later rather than sooner. At the moment I am collecting parts for the Stochino Amp and plan to built the first two units by the end of January so I'll be very busy until then and afterwards I have even a bigger project on my mind and afterwards another two Stochino units so I don't think I'll open the NAD earlier than in the late 2006. Si it looks that I will be using your experience in this venture.

Anyway, from what I know on the subject two kinds of improvements may be done to this and many other players in order to get better sound. Firstly a high quality XO clock could be installed (see LC audio or soundlabs for it). They sell such clocks with or without dedicated PS.

Secondly, one may upgrade caps, ICs and resistors in the analog section and PS. That is a relatively easy task. NAD C 542 is such a factory upgrade to the older C 541i so it might be of some help if you could get a service manual for C542 although it is not essential - the service manual for C541i is.

Apart from the above you can change everything but then I would start with getting a much better drive with lasers etc and a new case to fit it all. One would need a nice workshop with all the electronic equipement (mini factory?) to do that well. Anyway go to the LC audio site to read what could be done to a typical CD player.

Cheers,
Janusz

PS I would appreciate if you could email me a copy of the C541i player. That would save me some trouble in the future. My email is: janusz.pradzynski@dpi.wa.gov.au

How is life in Holland? I used to work in Rotterdam long time ago.

小鬼头

以下是引用布冬在2004-10-29 14:58:00的发言：
晶振可否用振荡电路代之?[em07][em07]

晶体+振荡电路（+接口电路）

上次我们坛试做的那块PCB，是一个振荡电路，可能输出电平还不够，需测测CD机内的再说。。。

布冬

晶振可否用振荡电路代之?[em07][em07]

小鬼头

不是装上去嘛。。。

别的。。。手头上没有，看过别人的，都装在脑袋里[em06]

HQ

以下是引用小鬼头在2004-10-29 9:10:00的发言：
价格资料？。。。没有。准备自己DIY，哈哈[em11]

[em06]

小鬼头

价格资料？。。。没有。准备自己DIY，哈哈[em11]

HQ

[em09][em09][em09]

HQ

以下是引用su7在2004-10-28 19:21:00的发言：
朋友的费力扑ＣＤ８８０换了稳补的晶振　改变很大

su7

朋友的费力扑ＣＤ８８０换了稳补的晶振　改变很大

HQ

好我也试试换个四脚的.[em06]

小鬼头

以下是引用wzy728在2004-10-28 13:12:00的发言：
其中SAA7220的10,11两个接晶振,有关资料说11脚是X<I></I> IN,也就是频率信号的输入端.实际操作就简单了,把原来的晶振和负载电阻电容焊掉,把四脚晶振的输出接到11脚,电源和地就近接在SAA7220的电源脚(24脚)和地就可以了.
我的图片上长的红色引线就是晶振的频率输出脚,短的红线就是晶振电源脚.

以前我检查机子时发现有趣的现象，所以想出了个查找（原机为简单门电路做的晶振）办法。。。

如果有示波器就很方便，不用查原理图就可找到这个口——（甚至不用示波器，直接改装并选一个口来试验，但要在新加晶振的输出端处串个电阻来试，以策安全）：示波器测原晶振一只脚信号，在另一只脚上用指针万用表档“量电压”，若“量”时示波器的信号消失，即表明，“量”的这只脚所接的IC引脚是入口（即门电路的输入端，晶振另一头是门电路的输出脚）。

wzy728

以下是引用HQ在2004-10-28 12:37:00的发言：
[em09]

其中SAA7220的10,11两个接晶振,有关资料说11脚是X IN,也就是频率信号的输入端.实际操作就简单了,把原来的晶振和负载电阻电容焊掉,把四脚晶振的输出接到11脚,电源和地就近接在SAA7220的电源脚(24脚)和地就可以了.
我的图片上长的红色引线就是晶振的频率输出脚,短的红线就是晶振电源脚.
看看一篇老帖子，有小鬼头兄的解说．
http://www.hifidiy.net/dispbbs.asp?boardID=2&replyID=18873&ID=2382&skin=1

ylc

这两天刚问过制作晶振的本地外资厂，频率稳定度+-1ppm的11.2896M温补晶振，量小的话，要200元/块，不知合不合算。

HQ

[em09][em09]
[em11][em11][em11]

小鬼头

HQ   
  
  
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HQ再灌一两天又可以升等级了。。。呵呵

HQ

[em09]