一个希捷80G死硬盘的修复（转）

一个希捷80G死硬盘的修复（转）

Fixing a dead Seagate 80gb drive
In case this helps someone else:

A colleague was given a broken PC. They were told that the power supply had blown, and the owner decided to buy a whole new PC rather than bother to fix it. I was asked to to try to get it to go. I tried a different ATX power supply and after some false starts I got most of the PC going again. It had two internal drives; a 10GB IBM drive plus a Seagate 80gb (ST380023A Barracude V). One thing I did find was that even with a new ATX PSU, the PC would not turn on with just the power of the 80gb drive connected. There was something seriously wrong with the 80gb drive. Anyway, I returned the PC and said both the power supply and the 80gb drive were broken, so they'd at least have to get a new PSU. I kept the 80gb drive since it was 'junk'.

But I was quite curious about the 80gb drive. I measured across the power connector. Between +5V and GND was some resistance, but +12V to GND seemed like a short circuit. Fortunately I actually had a working Seagate ST380023A Barracude V drive in another machine, so I pulled it out to compare. Interestingly this drive was bought from the same shop during the same month (per the warranty sticker) and had the same firmware version, but the logic boards were actually slightly different. Anyway, on my working drive, I traced where the +12V line went and found a few things it connected to. One of these was a little black square with markings BUX C240 with two pins on it (which I think is a diode). Its down near where the Power supply connector comes in. By desoldering one end of this from the dead hard drive, I could see that the short circuit between +12V and GND was removed. I have a diode tester on my multimeter and I could see that the BUX C240 was shorted out. My working 80gb drive had a similarly placed black square which I could see was not shorted out. It had the markings BUF C242 I think. I then scrounged through my junk pile and found an old 630MB hard drive that was dead and desoldered a diode from it (well I think it was a diode - it was a black square with a line on one end and had two pins on it). I can't remember what the markings were. I soldered it in place of the BUX C240 on the dead drive making sure the line on the packaging was oriented the same way.

I then powered it on and suffice to say it now works perfectly. I have been told by more wise electronics experts that the diode may be a zener diode to provide over voltage protection and that my generic replacement might not protect it from over voltage ... but hey it works for now.


Update (Dec 2004)
I came across a Seagate 40gb drive in an online auction advertised as:
   Was working one day then stopped during a storm - never to go again

Of course, I had to bid on it to see whether it had the same seized diode fault ... didn't I? Well, NZ$7.50 later I had said 40Gb drive. This time it was shorted out between +5V and GND. Between +12V and ground was fine. Poking around with my multimeter I soon found a diode that was shorted. I replaced the diode and the drive seems to work fine now. Too easy.

看不懂
  不知道是什么  

看不懂,俺可不是文化人

看不懂

english ,

   衰~

修理死了的Seagate 80gb开车
以防这帮助另外的某人:
一位同事被给坏掉的PC。
他们被告诉电源已经刮，并且主人决定了而不是麻烦给全部买新PC修理它。
我被问到试着让它走。
我试用了不同的ATX电源并且在一些不成功的开始以后我得到了再走的PC的大多数。
它有了2内在的开车;
加一Seagate 80gb的10GB IBM开车(ST380023A Barracude V)。
我确实发现了那的一件事情是甚至与一新的ATX PSU，与驱动器连结了的80gb的只是权力PC将不开。
有随80gb开车严重错误的一些东西。
不管怎样,我返回了PC并且说电源和80gb开车被打破,因此他们不得不将至少得到一新的PSU。
自从它是我坚持了80gb开车“垃圾”。
但是我是关于80gb相当好奇开车。
越过权力连接器我测量了。
在+ 5V和GND之间是一些抵抗，但是象一条短路一样到GND的+ 12V似乎了。
我实际上幸运地让了一工作的Seagate ST380023A Barracude V在另外的机器开车,因此我外面拉了它比较。
从同样的的商店在同样的的月期间这开车有趣地被买(每担保滞销物)并且有同样的的韧件版本,但是逻辑板是实际上稍微不同。
不管怎样,在我的工作的开车上，我在+ 12V行去找了它连结了到的一些事情的地方跟踪了。
这些的之一是有有在它上的2枚大头针的标记BUX C240的稍黑的平方(我认为它是一个二极管)。
它的下面在在哪儿附近电源连接器进来。
到从死了的硬盘的这的desoldering一结束为止，我能看见在+ 12V和GND之间的短路被移开。
在我的万用表上我有二极管考试者并且我能看BUX C240 shorted外面。
我的工作的80gb开车有了我能看见的一个同样被放置了黑平方外面不是shorted。
它有了我认为那的标记BUF C242。
通过我的垃圾堆积我那时搜寻了并且从它发现了是死了的一块旧的630MB硬盘和desoldered一个二极管(很好我认为它是一个二极管它是有在一结束的行的一个黑平方并且在它上有了2枚大头针)。
我不能记得标记是什么。
代替BUX C240在死了的开车上我锡焊了它在包装上确信行是面向的同样的的方法。
我那时产生动力它上并且足以做说它现在完美地工作。
我被二极管可以是一个禅宗二极管电压保护上提供并且我的普通的代替可能不阻止它超过电压的更明智的电子学专家已经告诉...
但是嗨它为现在尽力。
校正(2004年12月)
在被做广告了作为的一次联机的拍卖我碰到了Seagate 40gb开车:
有天正在工作然后在暴风雨期间停止了永不再走
当然,我不得不求包它审实它有了同样的抓住的二极管过错...
我？
很好,以后我已经说的NZ$7.50 40Gb开车。
这次它shorted外面在+ 5V和GND之间。
在+ 12V和地面之间是杰出的。
用我的我快发现了一个二极管那那的万用表到处寻找shorted。
我代替了二极管并且开车似乎现在工作正常。
太容易。

啥呀乱了吧唧的

楼上的翻译的太好了，还是看不懂，呵呵

晕啊，难懂啊

俺可不是文化人

翻译的太好了，还是看不懂，呵呵

看不懂请高人给翻一下吧

俺可不是文化人

想学习一下，但看不懂，

那个翻译就软件翻译的，看懂了才怪
软件翻译普通的还成，专业的就不用想了

看不懂！翻译不来！无奈！

饿~~~~什么跟什么都不知道

kanbudongya

支持哈大哥！