Ignoring Techie Friends’ Advice Caused Return Of Butterfly Induction Cooker Model Rhino
This induction cooker had visited me in December, 2022. Kindly read history in the following link:
Bridge Rectifier And IGBT Found Blown In BUTTERFLY Induction Cooker Model RHINO | Electronics Repair And Technology News Bridge Rectifier And IGBT Found Blown In BUTTERFLY Induction Cooker Model RHINO (jestineyong.com)
It was brought back by my son during his next visit (March, 2023) stating that it failed once again tripping the MCB. Any tripping of MCB is a clear indication of the IGBT shorting. According to him, the cooker worked only for a week. I opened the set and found IGBT blown, though there was no problem with any other components in the power supply area.
My techie friends had cautioned me that giving an Induction Cooker back after replacing only the IGBT without replacing a few related components, though found ok, would bring it back soon and this is exactly what happened! I saw one resistor with change of color due to heat. So, this time, I did replace the following components:
1) IGBT 2) 18.5V Zener 3) 78L05 regulator IC 4) 8050/8550 transistors 5) All electrolytic capacitors 6) All push to on switches 7) IN4148 diodes 8) The strained resistor.
The high watt resistors were found ok and the final voltage of 2.7V that goes to the IC was also ok. Hence I left it. But my techie friends do advice to replace these too. I used FGA25S instead of N1600, as from my experience I have found that the former is very sturdy and will last longer. Then the cooker was found working very well.
I used it in our kitchen for almost a week until my son took it to his home at Bangalore. He reported that the cooker was working very well.
The reason why I ignored my techie friends’ instruction was to counter check their caution and see what happens. Secondly, there was no time to carry out these works last time he was in a hurry to return to Bangalore and I did all the service work overnight. Anyhow, my techie friends proved right and I learnt a lesson! (Getting a device back this way is safer within the family than from an outside customer) (I have ignored replacement of high watt resistors; let us see what happens! [LOL]).
Mission accomplished with experienced satisfaction getting collected as usual!
This article was prepared for you by Parasuraman Subramanian from India. He is 72 years old and has more than 30 years’ experience in handling antique equipment like Valve Radio, Amps, Reel Tape Recorders and currently studying latest tech-classes conducted by Kerala State Electronics Technicians’ Association. He has done graduation in BBA degree, private diploma in Radio Engineering and retired as MD of a USA company. Presently working as Consultant to Hospital and other institutions.
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