中招了！

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10/5/2007

中招了！

我以前的 linksys wrt54G 变压器坏了，他用的是一个 5V 2A 的电源，看了一下还比较难配，淘宝上面的价格都在 20 以上，手边这些电源翻了一下，最接近的似乎是一个 5V 850ma的，但是显然也还不能满足他的需要。比较奇怪的是新买的一个居然用的是 12V 1A 的电源，于是在 Google 上面搜索了一下 linksys wrt54g voltage, 第一条里面如是说：

Actually, the WRT54G/GS will run on anything between 3.7VDC and about
18VDC. The internal switching regulator has a very wide input voltage
range. For my WRT54G v1.1:
Volts Amps
15 0.25
12 0.3
5 0.8
4 1.0

看了这个我很高兴，手边其他电压能提供这个功率的电源倒是有一些，于是找出来一个 thinkpad 电源， 16V 4.5A，功率显然是足够了。然后我往路由上面一插，瞬间啪的一声，赶紧拔下来，一屋子都是糊味。

拆开来在电源插口周围看了半天没有发现异常的，电容们状态都很好。仔细一看，主 cpu 上面有个洞，如下（BROADCOM 的 RO 下面那个坑就是）

实在是太衰了，难道网上那位骗人么？跟 atppp 聊了下，他建议我看看是什么稳压电路。网上搜索一下，都说 linksys wrt54g 用的是个 3.3V - 40V通吃的芯片。我的拆开发现版型完全不对，仔细找了下居然是这个芯片

文档里面如是说

Absolute Maximum Ratings (Note 1)
l Supply Input Voltage, Vcc ----------------------------------------------------------------------------------------- 7V

看来这个路由本身的稳压电路就很弱，别说上 16V, 上 12V 都很可能就秒杀了。不过他号称自己有 voltage protection 功能，在过压状态居然没有自己爆掉，却把 cpu 爆掉了，真是他母亲的。完全不合格产品么。

总之就是很失败的爆掉了一个路由，只剩下壳子可以卖掉了。

1:48:59 PM | Blog it

Comments (8)

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	Eric Yuwrote: 旧的不去，新的不来，恩 Oct. 12
	L.wrote: 中招都中得这么帅这么有专业精神... Oct. 5
	kangxiaoningwrote: 要换当然要换能定制的了，apple 那个再好，不能刷自己的 fw 还是不行啊。我花 180 买了个 dell truemobile 2300, 16M ram, 4M flash, 200mhz cpu , 可以刷 linux 的。用起来貌似很好。现在这些东西价格还是不错了。 Oct. 5
	ideafestwrote: 哀悼…… 前几年俺也给WRT54G找过电源（原配的110v输入），大电流的变压器确实不好找，20已经很便宜了，我在成都城隍庙买的四五十元。换一个 Apple Airport Extreme 11n？ ;) Oct. 5

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