彩电无彩色故障切勿轻易更换晶振

• 作 者: 李洪英
• 出 处: 家电检修技术
• 发表日期: 2001年08期
• 关键词: 晶振 检修实例 外围元件 检修过程 行逆程脉冲 脚电压 电子报刊 故障点 对地电阻 信号输入端

最近国内不少电子报刊中都刊有彩电无彩色故障的检修实例,叙述检修过程时多数谈到,无彩色故障出现后,检查外围元件无故障,于是就先换晶振,后换集成电路,甚至将彩色信号有关的元件一并更换,仍无彩色。无奈之际,买回几只晶振依次更换,终于有了彩色,于是得出结论是晶振质量欠佳,似乎只有出现彩色的那只晶振才是“正品”。恕我直言,这种检修方法是

Recently, many electronic newspapers and magazines are covered in a color TV without color troubleshooting examples, the description of the maintenance process most talked about, no color fault occurs, the external components to check for trouble-free, so the first for the crystal oscillator, after the exchange of integrated circuits, or even The color signal-related components to be replaced, still no color. In desperation occasion to buy back a few crystal followed by replacement, and finally with color, so concluded that the crystal quality is poor, it seems that only the color of the crystal is “genuine.” IMHO, this method of repair is