论文部分内容阅读
一台创维21TH9000彩电,出现“三无”,红灯亮的故障。拆机后,测主电源输出电压正常,怀疑待机控制部分有问题,检查发现该机为TDA9370超级单片机。查图纸发现,其“!脚为“Standby(”待机)控制,经Q607再控制Q606,使12V经Q606后再由L7808稳压,得到8V电源,为小信号电路供电。正常Q607b
Skyworth 21TH9000 color TV, there ”three no“, red light fault. After disassemble, measure the intersection of main power and output voltage normal, suspect the intersection of standby control and part have problem, check and find this machine is TDA9370 super one-chip computer. Check the paper found that its ”feet“ Standby (”Standby") control, Q607 and then control the Q606, so that after 12V by Q606 L7808 regulator, get 8V power supply for small signal circuit normal Q607b