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一台北极星牌石英钟,运行半年后停走,更换新电池也无效。拆开盖壳检查,发现机芯电路板与电池正极连接片采用压接接触,由于该处电路板铜箔表面氧化,产生较大的接触电阻(约几十千欧以上),致使石英钟停走。笔者采用下列方法处理:先用细砂纸将铜箔表面打磨干净,再用电铬铁给它镀上一层锡。在进行操作时,应使电烙铁接地,以防静电将集成块击穿。然后装
A Polaris licensing quartz clock, stop running after six months, replace the new battery is invalid. Open the cover inspection and found that the movement of the circuit board and the battery positive connector using crimp contact, as the surface of the circuit board copper oxide surface oxidation, resulting in a larger contact resistance (about tens of thousands of ohms or more), resulting in quartz clock stopped . The author uses the following methods to deal with: First with fine sandpaper polished copper surface clean, and then electroplated ferrochrome plated it with a layer of tin. During operation, the soldering iron should be grounded to prevent the manifold from breaking down due to static electricity. Then loaded