Mad Of Science

                       Few  days back  while watching Tv  suddenly  I noticed a change in  the picture size. I changed the channel and it remained the same .The problem is horizontal picture size of my Tv , it has shrinked. The vertical size is  fine.

                   Instead of flat ,straight picture ,it turned to be curved one.  It happened frequently  and  I already had a guess about the culprit.

In my previous post I shared my experience about my UPS now I have two more devices to share with you all. One thing is Electronic Choke and the other Emergency lamp.

Electronic Fluorescent lamp choke:

I got a tube light with no response ,from one of my customer .His doubt was lightning. I opened the electronic choke and his doubt was right it was affected by lightning. I just had a look at the PCB, line to a small transformer inside was burnt .


I just gave a parallel connection to it using a small bit of wire. I checked each and every component inside and everything works fine. After connecting the choke I switched on and the tube light glows.

Emergency lamp:

Another case was with an emergency lamp which is plugged in while charging and was affected by lightning .


The green light was not glowing that is battery is not charging but it can discharge . The lamp glows with the residue charge present in the battery.

After opening the lamp having a look at the PCB found a hole in the PCB , might have got a severe volt. Fortunately everything was fine I checked each and every component . Now as usual I traced the line and gave a parallel line to the small transformer whose circuit was burnt.


Now i plugged in and switched on the lamp ,the green light glows and the battery is charging . Every thing works fine.

Like many other guys me too very much interested towards electronics and I like troubleshooting them. Here I am going to share some of my experience regarding electronic gadgets affected by lightning .

Normally a device gets affected by lightning when its power chord is just plugged in , doesn't matter its switched on or not, just a plugged chord is enough to get affected by lightning.


First thing I am going to share is about my UPS

UPS:

One night I left my UPS plugged in , but power is switched off . I went to sleep , around midnight I heard a loud bang like how a glass piece dropped down will make shattering sound. I woke up and ran towards my PC and TV thought one of my picture tube would have burst. Luckily both was safe , I happily went to sleep without knowing the whats waiting for me the next day , next morning when I switched on my PC, UPS has no response and at that time I recalled what happened last night.




Opened my UPS, removed PCB board , what I saw was along the border of PCB the ground line was burnt and lost two diodes, which I found later after testing with Multimeter.

I just tracked down the line of PCB and just soldered a piece of wire instead of that line and replaced those diodes. Now it works fine .


I have seen some more devices affected by lightning .In my experience ,when compared to other faults lightning causes PCB burning normally it doesn't spoils any components.