0024000, 000-year-old fossils (see list below). They are not all known to have been directly linked to the Cambrian explosion, but they are believed to have helped to support the idea that the Cambrian explosion occurred, and may have helped to explain the early appearance early appearance of the first land plants and animals, may have been one of Darwin’s major ideas. As a child, Darwin was a keen observer of the animals and plants that lived on the island. He was attracted to their beauty, and took a particular interest in birds. He used this interest to explainnterest to explain his use of birds in the painting. He was also fascinated by nature; he painted a bird's-eye view of the Great Plains, which he would describe as'the most beautiful scenery in America. 'In his second solo exhibition he painted " the last tree in the forest。

故障现象：电机不转

所有洗衣程序都出现电机不转的现象。没有出现报警错误。测绘变频驱动板电路，分驱动板工作电源部分、MCU部分、瑞萨IR2136S变频器的部分、检测电路部分。根据测绘的电路图分析问题原因。在测绘电路图的过程中查阅了相关芯片、三极管、二极管、霍尔开关的技术资料。

变频器主电源310V滤波是由两个1000μF/200电容器串联的，六个39k均压电阻有三个断路；变频输出电压检测部分三个200k电阻断路。都是贴片电阻，用普通电阻代替，更换后安装好驱动板，测试“单脱”功能，电机依然不转。

驱动板上有一个继电器，电机工作时，继电器触点闭合，短接470Ω电阻。从继电器引出线。洗衣机开机，用万用表测量有更高90V电压，很快降下来。接39k电阻和红色LED发光二极管，二极管随着控制程序亮、暗变化，应该是在脱水电机工作时亮，电机停下来变暗。LED发光二极管不亮时，应该是主电机工作，脱水状态。470Ω电阻上的压降。

过程中没有出现“EARu”通讯故障报警。

拆下变频驱动板继续核对测绘电路图，核对MCU引脚电路时，找到电阻R303、R304、R301、R302、R310（被白色胶覆盖着，散热差。小心剥离胶，看清阻值都是200k）及R311（10k）。MCU(38 P0_7 AN0)脚接R311，310V直流电压采样。测量R303、R304、R301、R302、R310五个电阻，有四个断路。

拆下测量不通的四个电阻，逐一测量，确认坏了。经计算正常时，取样电阻对地电压大约3V，即MCU判断电机供电电压是否正常。这应该是电机不转的根本原因。

手头没有200k贴片电阻。临时找一个8.2k电阻代替四个200k电阻，接到 5V电源上。驱动板安装好测试“单脱”功能，OK。电机转了。

再试“快洗”功能也正常了。电机不转的原因就是310V电压取样信号因为分压电阻坏了，MCU判断为电机供电没有电压。洗衣机功能正常后，用相同阻值的普通电阻替代贴片电阻，洗衣机线路等恢复原样，工作正常。因为在维修、测绘电路图的过程中，剥离了的驱动板上的防水胶，修复之后驱动板涂705防水胶恢复原有防水措施。

MCU软件设计上应该有不妥，既然测量了310V电压，当电压不正常时，应该报错误代码。不应该处于无休止的等待状态。其次断路的贴片电阻都是高电压下工作，这些电阻基本上都是被厚厚的白胶覆盖了，基本无法散热。至此变频滚筒洗衣机修复正常。

早期生产的变频滚筒洗衣机，不论是哪个品牌的，基本上和这个洗衣机是相同的结构，尤其是变频驱动板，只是不同厂家的电机参数有所不同，变频驱动板的控制参数不同而已。本案例的电机是上海通用0024000133A。5KMC121YTA002。