Wednesday, July 29, 2009

Its HIGH voltage, I play with it ....



Service Engineering ... Thats what I do now. More precisely, a kinda reverse engineering. Identifying the faulty component and replacing it with a new. Sound quiet easy huh ? But guys ... .this is the damn-est job u can find in electronic industry.

yesterday I received one specimen with a small note on it. "No ip" - it means its dead. Its not working. I started working with standard procedure.

AC mains circuit - Continuity tested, No shortage. Next AC Filter circuit - its little weird, I'll check it later... Next Bridge rectifier - No burns or smoke trace. IGBT and gate circuit - Nothing wrong. uC - tested. Buses and cables continuity tested.

After 1 hour I cant find anything wrong with this thing. I assembled and switched on... Nothing. I cant even find any smell of burned component. I was like ...grrr. ' whats wrong with this thing. I was sure fault will be in the High voltage section. After the bridge to the GATE. I took and Hold the PCB one hand and took the tester and touched it somewhere on the lids. @@## FLASH ##@@

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"Hey wake up ... Dont u need lunch today ?? " My friend is calling me. 'What happened ! Where in a world ..... ' "Its not good to sleep in duty time. U'll get scolding" - He advised me and walked to the door. I was still in confusion. I looked watch and its 1 o'clock. I looked my table and I just started to realise what happened.

I touched a fully charged capacitor. Since its a capacitor and dont have any amps it cant do any physical damage to victim. U'll be just blacked out. The same principle is used in stun-guns.

Anyway that was a nice piece of experience.

6 comments:

Mahesh Sindbandge said...

Hmmm.. not even one semester wnet by where i ahvent used this terms likes rectifier, resistor, capacitor, voltage and current..

After all electronics was my stream...

liked it... reminded me of my college days..

Keep writing..

Mind Writer! said...

Whew! Your post brought me back to reality that I'm a Statistician!

Shafi said...

@ Mahesh Sindbandge ..

Ha ha ... thanks buddy. I was too ignorant about all these. What u studied all wont be using in the field. I too recently came familier with these ...

Shafi said...

@ Mind Writer!

Statistician! ... lol am confused ... :)

Mind Writer! said...

Well, actually I couldn't understand much of those engineering and stuff. So I wrote that I'm a Statistician so I'm not supposed to understand all these...lol!

Or do I have to explain what is "Statistician"?!? Ah, well, I graduated in Applied Statistics so, I kinda think that I would eventually be a Statistician, you know those who analyze the data, forecasts and explains about the scenario of the field from which the data arrives which helps in decision taking, and much more!

Have I answered properly? :-/

Shafi said...

@ Mind Writer!

ha ha... I like that. Nice expression. hmm :D

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