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这是我在www_photo_net上找到的：

Canon EOS A2/A2E/5...How To Fix Pop-up Flash___Informational


EOS A2/A2E/5 Hot Shoe Diagram

One complaint about the A2/A2E/5 EOS cameras is the occasionaly the pop-up flash will get stuck...the camera system is fooled into thinking there is an external flash in the hot shoe and the pop-up will not pop-up. This is too good of a camera to reject over this simple problem. Also, now the command dial can be replaced if it breaks without a major cost repair.

The problem on the pop-up flash is with two tiny micro switches that get stuck in the tiny holes they move up and down in. One or both gets stuck down, closes with switch, and the camera is fooled into thinking that there is a flash in the hot shoe.

Thanks to Jim Strutz and Vitaly Kirvoy (photo_net members) I was given information on how to readjust these switches easily and quickly. I want to pass this along.

Look at the diagram above. Use a sharp thin pin or tiny flat head jeweler's screwdriver, and insert the point under the thin metal plate, pointing the pin toward the lens at the tiny hole which locks your Canon flash to the hot shoe. Lift this plate up. I didn't lift it up at first and that's where I had a problem! It will come up easily...stupid me! Lifting it up will release the cover plate and you can slide it back and off the hot shoe. You will then see a couple of screws. These hold the hot shoe mechanism on the camera. You will NOT need to take off the hot shoe assembly...don't do that! Simply loosen the screws slightly with a jeweler's screwdrive (which all of us should buy!), so the hot shoe mechanism can be moved slightly. Look under the flash shoe guides and you will see very tiny plunger like switches. These must move up and down in the holes freely. The holes are very tiny and these plunger micro switches will get stuck in time. Just move the hot shoe around a bit until they pop back up. Then, with the pin or screwdriver, be sure they move up and down freely...use good light and look closely at them. Retighten the screws and put the metal cover back on, and your flash should work again.

Disclaimer: If you are uncomfortable doing this yourself, take it to a repair shop, but, believe it or not, when this happend to mine, I could not find a repair shop that knew how to fix it (!) or they wanted to fool me into believing that this would be a big bucks repair item!

Try it if you are good with tools.

-- Todd Fredrick , July 16, 2000; 01:24 P.M. Eastern

我以前的那台EOS5有过和这一样的毛病,过了一阵子又自己好了,时好时坏,后来换了底下一快板花了600元,再后来被偷了,看来EOS5此处也是事故多发区,有必要叫CANON公司来解释一下.

见过拆开的EOS5，内置灯的变焦和弹起/收回全靠一只小马达来驱动，问题应该不算太大。

无论是电子故障还是机械故障，千万别自己动手拆机器！
现代的电子相机都是很精密的，复杂的电子线路和紧凑的机械结构并不是我们这些非专业人员所能够修理的。
强烈建议你把机器送佳能维修站！！！

[吴虫虫 编辑于 2002-11-20 20:35 ]