论文部分内容阅读
例1 机型:长虹 C2591AV 彩电故障现象:遥控关机后,延时10s(秒)左右后声、图全无,屏幕却呈暗红黄色光栅,即不能实现交流关机。分析与检修:该机为遥控交流关机型,见图1所示。它的电源开关与很多别的彩电不同,是带继电器电磁铁控制方式的电源开关(S801)。当按下电源开关 S801上的电磁装置的金属钩使开关触点锁定,保持接通状态,电视机正常工作。这时,CPU/N001(PCA84C841P)的(41)脚(POWER 控制端)输
Example 1 Model: Changhong C2591AV color TV Fault phenomenon: Remote shutdown, the delay of about 10s (seconds) after the sound, no picture, the screen was dark red yellow grating, that can not be achieved AC shutdown. Analysis and maintenance: This machine is remote control AC off type, shown in Figure 1. Its power switch and many other color TV is different, with a relay solenoid control mode power switch (S801). When pressing the metal hook of the electromagnetic device on the power switch S801 to lock the switch contact, keep the connected state, the TV works normally. At this moment, the CPU / N001 (PCA84C841P) pin (41) (POWER control terminal) is lost