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<p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; line-height: 25.6000003814697px; white-space: normal; widows: 1; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important; text-align: center;"><strong style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 20px; box-sizing: border-box !important; word-wrap: break-word !important;">集成电路代换技巧</span></strong></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><strong>非直接代换</strong></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /></span>非直接代换是指不能进行直接代换的<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>稍加修改外围电路，改变原引脚的排列或增减个别元件等，使之成为可代换的<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>的方法。<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;">代换原则：代换所用的<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>可与原来的<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>引脚功能不同、外形不同，但功能要相同，特性要相近；代换后不应影响原机性能。<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><br /></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><strong><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">1.</span>不同封装<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>的代换</strong><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;">相同类型的<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>芯片，但封装外形不同，代换时只要将新器件的引脚按原器件引脚的形状和排列进行整形。例如，<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">AFT</span>电路<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">CA3064</span>和<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">CA3064E</span>，前者为圆形封装，辐射状引脚；后者为双列直插塑料封装，两者内部特性完全一样，按引脚功能进行连接即可。双列<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC AN7114</span>、<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">AN7115</span>与<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">LA4100</span>、<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">LA4102</span>封装形式基本相同<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">,</span>引脚和散热片正好都相差<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">180</span>°。前面提到的<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">AN5620</span>带散热片双列直插<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">16</span>脚封装、<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">TEA5620</span>双列直插<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">18</span>脚封装，<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">9</span>、<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">10</span>脚位于集成电路的右边，相当于<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">AN5620</span>的散热片，二者其它脚排列一样，将<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">9</span>、<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">10</span>脚连起来接地即可使用。<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><br /></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><strong><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">2.</span>电路功能相同但个别引脚功能不同<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>的代换</strong><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;">代换时可根据各个型号<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>的具体参数及说明进行。如电视机中的<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">AGC</span>、视频信号输出有正、负极性的区别，只要在输出端加接倒相器后即可代换。<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><br /></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><strong><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">3.</span>类型相同但引脚功能不同<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>的代换</strong><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;">这种代换需要改变外围电路及引脚排列，因而需要一定的理论知识、完整的资料和丰富的实践经验与技巧。<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><br /></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><strong><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">4.</span></strong>有些空脚不应擅自接地内部等效电路和应用电路中有的引出脚没有标明，遇到空的引出脚时，不应擅自接地，这些引出脚为更替或备用脚，有时也作为内部连接。<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><br /></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><strong><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">5.</span>用分立元件代换<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span></strong><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;">有时可用分立元件代换<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>中被损坏的部分，使其恢复功能。代换前应了解该<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>的内部功能原理、每个引出脚的正常电压、波形图及与外围元件组成电路的工作原理。同时还应考虑：<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><br /></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">(1)</span>信号能否从<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>中取出接至外围电路的输入端：<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><br /></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">(2)</span>经外围电路处理后的信号，能否连接到集成电路内部的下一级去进行再处理（连接时的信号匹配应不影响其主要参数和性能）。如中放<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>损坏，从典型应用电路和内部电路看，由伴音中放、鉴频以及音频放大级成，可用信号注入法找出损坏部分，若是音频放大部分损坏，则可用分立元件代替。<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><br /></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><strong><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">6.</span>组合代换</strong><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;">组合代换就是把同一型号的多块<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>内部未受损的电路部分，重新组合成一块完整的<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>，用以代替功能不良的<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>的方法。对买不到原配<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>的情况下是十分适用的。但要求所利用<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>内部完好的电路一定要有接口引出脚。非直接代换关键是要查清楚互相代换的两种<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>的基本电参数、内部等效电路、各引脚的功能、<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>与外部元件之间连接关系的资料。实际操作时予以注意：<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><br /></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">(1)</span>集成电路引脚的编号顺序，切勿接错；<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><br /></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">(2)</span>为适应代换后的<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>的特点，与其相连的外围电路的元件要作相应的改变；<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><br /></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">(3)</span>电源电压要与代换后的<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>相符，如果原电路中电源电压高，应设法降压；电压低，要看代换<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>能否工作。</p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><br /></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"> ⑷代换以后要测量<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>的静态工作电流，如电流远大于正常值，则说明电路可能产生自激，这时须进行去耦、调整。若增益与原来有所差别，可调整反馈电阻阻值；<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><br /></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">(5)</span>代换后<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">IC</span>的输入、输出阻抗要与原电路相匹配；检查其驱动能力。<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><br /></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">(6)</span>在改动时要充分利用原电路板上的脚孔和引线<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">,</span>外接引线要求整齐，避免前后交叉，以便检查和防止电路自激，特别是防止高频自激<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">;<o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></p><p style="margin: 0pt 0pt 0.0001pt; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; white-space: normal; widows: 1; line-height: 19.5pt; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><br /></span></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif; font-size: 16px; line-height: 25.6000003814697px; white-space: normal; widows: 1; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span style="font-size: 16px;"><span lang="EN-US" style="max-width: 100%; font-family: Calibri; box-sizing: border-box !important; word-wrap: break-word !important;">(7)</span><span style="max-width: 100%; font-family: 宋体; box-sizing: border-box !important; word-wrap: break-word !important;">在通电前电源</span><span lang="EN-US" style="max-width: 100%; font-family: Calibri; box-sizing: border-box !important; word-wrap: break-word !important;">Vcc</span><span style="max-width: 100%; font-family: 宋体; box-sizing: border-box !important; word-wrap: break-word !important;">回路里最好再串接一直流电流表，降压电阻阻值由大到小观察集成电路总电流的变化是否正常.</span></span></p><p><br /></p><p style="white-space: normal; line-height: 24.381px;"><span style="color: rgb(62, 62, 62); font-family: Arial, Verdana, sans-serif; line-height: 1.75em; text-indent: 0em; max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">地址：广州市天河区银利街银利茶叶博览中心E栋4楼E4030室 </span><span style="color: rgb(62, 62, 62); font-family: Arial, Verdana, sans-serif; text-indent: 0em; max-width: 100%; font-size: 14px; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important;"> </span><br /></p><p style="text-indent: 0em; white-space: normal; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important;">邮编：510507</span></p><p style="text-indent: 0em; white-space: normal; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">电话：(+86)020-8722 8723 8764 5360 8764 2943 </span></p><p style="text-indent: 0em; white-space: normal; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">传真：020-8722 8623</span></p><p style="text-indent: 0em; white-space: normal; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">全国统一免费服务热线：400-020-6788</span></p><p style="text-indent: 0em; white-space: normal; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">微信公众帐号：</span></p><p style="text-indent: 0em; white-space: normal; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><img data-ratio="1" src="http://mmbiz.qpic.cn/mmbiz/dx3KibwtDhvfCZvZq5PcthnDKlnnq3AalhbichW77J3B70osicTickklZybNKUZqc44DZ0oaWaHm2p0TaA9478icwPg/640?wx_fmt=jpeg" data-type="jpeg" data-w="120" width="auto" style="box-sizing: border-box !important; word-wrap: break-word !important; visibility: visible !important; width: auto !important;" /></p><p style="text-indent: 0em; white-space: normal; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">维修咨询：QQ: 712638 404</span></p><p style="text-indent: 0em; white-space: normal; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">设备咨询: QQ: 712638 405</span></p><p style="font-size: 16px; white-space: normal; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); line-height: 24.381px; text-align: justify; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span style="font-size: 14px; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; text-indent: 0em;">软件咨询：QQ: 712638 406</span><br /></p><p style="text-indent: 0em; white-space: normal; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">配件咨询：QQ: 712638 407</span></p><p style="text-indent: 0em; white-space: normal; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">交流Q群：1106 11074</span></p><p style="text-indent: 0em; white-space: normal; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">网址：http://www.yiliaoshebeiweixiu.com</span></p><p style="text-indent: 0em; white-space: normal; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; background-color: rgb(255, 255, 255); box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">电子邮箱：service@yiliaoshebeiweixiu.com</span></p><p><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;"><br /></span></p><p><br /></p>
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发表于 2020-10-19 23:29:45