主题：[原创][求助]QA350更换LDO作业报告

 

 

今日an7790到货，晚饭后开始折腾，真心艰难。

 

主要是被机内电池插座挡住不好操作，那就拆吧。

 

巨难！所以顺手把插座那条尾巴切了，充电口也拆了。

 

换LDO倒是轻松，一步搞定。恢复，通电，完美。

 

再放黄小琥的没那么简单，仍然用AD827/883，天啦噜

 

完全没有之前那种力不从心、五音俱破的感觉，取而代之是大气、从容、甜润，个人听后感罢了，大家不喜勿喷啊。

 

未料，一出悲剧正上演

 

查到AD883供电电压可以上到15v，对于提高电压后的表现很是满意，心里未免大意，就想试试12v电源直供，然后就哑了！！！

仔细检查电路发现，AD883（就是原机的AD8656）与WM8740SEDS共用一个LDO！

 

真是悲催了，怪自己不够认真吧。

 

目前仅查出这个结果，还请陈总指点，WM8740供电3.3-5v，如果提高到9v貌似还能正常工作，但是否有其他隐患。谢谢。

 

所以到现在的情况是：WM8740光荣牺牲，已经下单同型号芯片，再等几天吧，电池也要到了…

 

8740供电电压最高只能5V,   极限电压是7V,    超过就会烧坏。 

Good information

Assignment help

我也有一台，请教楼主那个elan电容式多少容量的，装得进去？

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