论文部分内容阅读
4.有图像,无伴音遇到这类故障,先要检查集成电路⑥脚有无音频信号输入,如有音频信号输入,检查集成电路②脚的接地电阻R11是否开路和伴音输出电容C12是否失效。然后检查集成电路④脚与⑤脚之间的LC振荡回路是否失调,主要是检查电感L3是否开路或电容C14是否变质或失效。如LC振荡回路的电感、电容无问题,可判断为集成电路内部的伴音处理电路损坏。5.图像正常,伴音小或失真并有交流哼声这类故障产生的原因基本与上例相同,可按上述
4. There are images, no sound encountered such failures, first check the IC ⑥ feet audio signal input, if the audio signal input, check the integrated circuit ② foot grounding resistance R11 is open and the sound output capacitor C12 is invalid . Then check the integrated circuit ④ feet and ⑤ feet between the LC oscillation circuit is out of tune, mainly to check whether the inductor L3 is open or the capacitor C14 deterioration or failure. Such as the LC oscillation circuit inductance, capacitance no problem, can be judged as integrated circuit sound processing circuit damage. 5. The image is normal, with small or distorted sound and hum hum This kind of fault occurs basically the same as in the previous example, according to the above