NAD-T752-avr-si5 维修电路原理图.pdf
-
资源ID：152311
资源大小：157.07KB
- 资源格式： PDF
下载积分：8积分
会员登录下载
三方登录下载：
|
友情提示
2、PDF文件下载后，可能会被浏览器默认打开，此种情况可以点击浏览器菜单，保存网页到桌面，就可以正常下载了。
3、本站不支持迅雷下载，请使用电脑自带的IE浏览器，或者360浏览器、谷歌浏览器下载即可。
4、本站资源下载后的文档和图纸-无水印,预览文档经过压缩，下载后原文更清晰。
5、试题试卷类文档，如果标题没有明确说明有答案则都视为没有答案，请知晓。
|
NAD-T752-avr-si5 维修电路原理图.pdf
Service Information T752Circuit ChangePROBLEM: You may have a complaint that a low level white noise is comingfrom one or all channels during the first few minutes after turn on, then the noise will fade away.CAUSE: On the pre-amplifier/main in pcb, the volume I.C.s U602 and U603 aregenerating this noise. Additional filtering of the power supply on this board isrequired.SOLUTION: Add bypass capacitors to the +-12v power supply rails.Locate the pre-amp out/main in pcb. Install a 0.1uF 25v or higher voltage,bypass capacitor on each rail of the +-12v power supply line. The placement ofthese capacitors can be in parallel with capacitors C628 and C634. The capacitorideally should be surface mount type, however a ceramic disc or mylar type willalso work.Contact:NAD Electronics International633 Granite CourtPickering, ON Canada L1K 3K1Voice: 905-831-0799 FAX 905-837-6357 03/28/03RadioFans.CN 收音机爱 好者资料库
