目前,许多家用电子产品不附电路原理图和印刷板图。笔者想,厂家这一作法无非是技术保密。怕技术性原理泄密。其实,这是厂家不高明的举措。大家知道,原理性电路万变不离其宗,而且要剖析技术性电路也并非是件难事。目前,我国家用电子产品在技术上,与国外同类产 At present, many home electronics products do not have circuit schematics and printed board drawings. The author thinks that the manufacturer’s practice is nothing more than technical secrecy. Fear of leaking technical principles. In fact, this is an unwise move by the manufacturers. As we all know, the principle circuit has never changed, and it is not a difficult task to analyze technical circuits. At present, China’s home electronics products are technically similar to foreign products.