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kuai le 20 yao kong cai dian jian xiu yi li
Author(s): 
Pages: 26
Year: Issue:  6
Journal: Family Electronics

Keyword:  高频头电视节目中放电路有线电视台噪声点电视机瓷片电容万用表遥控彩电;
Abstract: <正> 一台20″快乐牌遥控彩电,只能收到有线电视台VL波段的1频道电视节目,且不太稳定,其余频道节目均无法收到,但屏幕上噪声点正常,说明中放电路正常。这样电脑部分、高频头电路就成了重点检查对象。电视机在正常预调状态下,测高频头各波段电压均正常,而VT端电压只能在0.5~2.3V之间且不稳定地摆动。测D026稳压管两端33V电压正常,检查与
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