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两层地网夹高压网结构
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手柄处有显示窗
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侧面是开关和充电口
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背面中间是铭牌和条码
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端部是电池盖
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开关、充电,整个电蚊拍确实一点反应都没有,只能拆开看了,先拆电池盖,打码的18650电芯,标记容量1600mAh,生产日期应该是2017年。
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电池电不少,应该是充过一段时间的原因
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继续手柄开壳
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控制板部分
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两个LED数码管
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两个按键,这个电蚊拍是抓住手柄就能电蚊子的,不抓不电
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板子正面没几个件,都在底面
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高压板
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看元件和一般铅酸的电蚊拍应该是一样的原理
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先测电源开关,木有开路或接触不良的问题
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再把控制板拆下来
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底面元器件还不少
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充电接口板倒是简单
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背面有版号等
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控制板细节,左侧是充电电路部分 。
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充电用了4060,比二极管+电阻放心多了
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中间是主控部分
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MCU芯片用的新唐的
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3.3V的LDO
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右侧是按键、接线等
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发现这个贴片电源滤波电容有锡渣,估计是偶拆板子时抖上去的,扣掉,其他未见明显异常。
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简单看下接线,把高压板分离后直接接3.7V锂电,终于亮灯了
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试下高压部分
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啪啪啪的很给力呀
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看来就是控制板的问题,去掉高压板,单检测控制板。
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MCU的电源没问题。
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把大部分电路分析了一下,应该是这样的。
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外围元器件测试均正常,判断可能是MCU虚焊。补焊之,通电后终于亮灯了
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插电源充电,也有显示了
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原样装好,插电,a、d、f段循环亮,表示充电ing
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开电源显示“HI”,高压提醒吧
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按下手柄,手柄前端LOGO点亮,老妈终于可以电蚊子了
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最后附上后画的电路示意图,方便大家参考
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这个米尼锂电电蚊拍的做工很不错,直接用锂电劲足、续航好,而且是电池仓设计,可方便更换电芯,这样的电蚊拍可以做便宜点,也省得铅酸的垃圾货满天飞了。
欢迎大家围观、指点,谢谢先!
技术交流请联系原作者
作者:ljlun
本文来源:数码之家