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本刊2001年第3期第45页刘保锋先生在检修赣新KG—5406彩电过程中,更换了几次场输出块(LA7830),并想弄清+26V升为+35V是否与更换R826有关,笔者认为先谈一下保险电阻的作用和如何选用,以及场供电电压升高的原因才能更好的说明问题。 1.保险电阻(R826)的作用和选用 (1)保险电阻的作用:当保险电阻支路电流大于正常工作电流,在该电阻上产生的功耗超过其额定功率
Issue 4, No. 3, 2001 page 45 Mr. Liu Baofei in the repair of the new KG-5406 TV color process, the replacement of several field output block (LA7830), and to find out whether + 26V + 35V R826 replacement is related to, I think the first talk about the role of insurance resistors and how to choose, as well as the reasons for the field supply voltage to better explain the problem. 1. The role of insurance resistance (R826) and the selection (1) the role of insurance resistance: When the insurance resistance current is greater than the normal branch current in the resistance of the power consumption exceeds its rated power