Doorbell Repaired
After reaching home I have pushed my door bell switch but no one is opening the door as I can hear some children’s playing noise from inside I waited outside but there is no response from inside. So I knocked door from outside and after waiting for some time they opened the door after entering in the home and just for confirm again I have ring a bell but it is not ringing.
So first I have refreshed myself and after some time of relaxing I have started troubleshooting the bell. First I have checked doorbell switch for working found ok so I removed the doorbell from the wall for the diagnosis.
On opening I found visually everything is ok from component side as well from solder side.
Now started testing the components off line there is no short circuit or open circuit. So what is wrong???
Again I have started visual inspection on component side and shaking the components one by one using my finger one ceramic capacitor fell down I have found the capacitor lids are broken from extreme leg side. That is because of corrosion.
Now a day’s many components makers using cheap iron metal instead of copper so that the service industry can survive……….!!!
Anyway replaced same capacity new Capacitor and checked the bell….. Found the bell is working now.
This article was prepared for you by Yogesh Panchal who works as a Computer Hardware Engineer in Mumbai India.
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Jestine Yong works as an Electronics Repair Lecturer in Kuala Lumpur Malaysia and his training website is http://www.NoahtechElectronicsTraining.com. You can check out his repair blog at http://www.JestineYong.com
12 comments on “Doorbell Repaired”
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Your comment “Now a day’s many components makers using cheap iron metal instead of copper so that the service industry can survive” was new to me. If true they probably never are able to skip making pcb’s without using copper tracks. Also because soldering onto copper is always much easier to do anyhow. Besides that it is a much better cooler metal too.
I think Yogesh meant the leads on the components, that seems to be mainly in the cheaper range of components.
you are Right Mike,
Thanks! for your comment.
Albert, This is not about the copper i mean to say they are using cheap iron metal leads on components and because they are using cheap quality components hence service industry is surviving.
I do not know how much profit they are making or Saving by using this type of cheap material i have seen many IC with metal legs instead of copper.in that contacts i have written the comment.
Is real help
You are welcome! Chesco
Good job, Yogesh!
Yogesh is right. I´ve dealt with a problem like this with a Christmas light, with 4 string of LEDs, driven by a small control plastic housing. Not prepared to work outside, the housing suffered from ingress of moisture, that attacked and corroded the leads of the SCRs in charge of driving the LED strings. With this, the terminals became fragile. There were four strings, with four small power SCRs of the same type for driving each one. One of the strings was not working. When I opened the small box, the SCR terminals started to break down one after another, even with a gentle touch. As a result, all 4 strings stopped working! It was necessary to throw all them away and buy four equivalent SCRs to put in place. Note: the SCRs thrown away were all working, but with no possibility to use them, as there were no leads anymore to solder!!!!
A lot of standard components use copper plated steel and also some cables too try it out to check with a magnet you will be surprised.
Good knowledge about material used at presently..
Good article and good information
Thank you a lot for taking the time for you to share such a piece of good information. They’re really helpful!