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彩电收看时出现不定时“自动关机”故障可分为两类:第一类是“自动关机”后必须人为关闭电源后,才能重新开机;第二类是“自动关机”后有时又能“自动开机。由于此类故障形成原因较复杂,令维修者无从下手,从而为排除故障花去很多时间。下面仅举几例,供大家参考。例1 海信TC2518KB彩电,每次冷机开机20～30min(分钟),热机开机工作3～10min(分钟)后“自动关机”,电源指示灯亮。有关电路见图1所示,海信TC2518KB大屏幕彩电,采用日本东芝公司TA8783和CXP80420—139,采用I~2C总线控制。图中V823为电源开关管,C831为+
Color TV viewing irregular occasions “automatic shutdown” failure can be divided into two categories: The first is the “automatic shutdown” after the man-power must be turned off before the reboot; The second category is “automatic shutdown” and sometimes “automatic Boot.Due to the complexity of the formation of such problems, so that maintenance were unable to get started, so as to remove the fault to spend a lot of time .Considering a few cases for your reference .Example 1 Hisense TC2518KB color TV, each cold boot 20 ~ 30min (Minutes), the heat machine boot work 3 ~ 10min (minutes) after the ”automatic shutdown", the power indicator light on the circuit shown in Figure 1, Hisense TC2518KB large screen TV, using Toshiba Corporation TA8783 and CXP80420-139, using I ~ 2C bus control.The figure V823 for the power switch, C831 is +