IGBT Found Blown In IMPEX Induction Cooker
Those of you, who had read my article on servicing Prestige Impex Cooker (https://jestineyong.com/caution-never-keep-one-induction-cooker-on-another-for-testing-a-lesson-learnt/) , may know the background of this case. As mentioned therein, I opened the set and found IGBT short. Anyhow, I was planning to open this cooker, clean and do some preventive maintenance, which was made possible by the other cooker!
After dismantling the whole cooker and subjecting it to a thorough cleaning and wiping, I brought it to the service table. Replaced the IGBT and all the electrolytic capacitors on the board. Did a thorough dry solder patch up on main board and the panel board. This cooker does not have any micro switches and works on touch. I am giving below a few pictures of the board as well as the ICs used for reference.
The first IC is the display control IC, second one is its uController and the third one is the PWM.
Reassembled the unit and took it to the kitchen for checking and found it to be working very well!
Whole work was over in an hour, which drew appreciation from my wife! (Obviously, I never shared the real reason for its failure, respecting the international set policy for ‘secrecy’ of husbands, followed by many like me in the world! (LOL).
Here is the picture of defective components replaced. Also is a picture of the new IGBT’
Well, well, well, this too got added to my satisfaction bag, though a result of a good lesson learnt!
This article was prepared for you by Parasuraman Subramanian from India. He is 69 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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You may check on his previous repair article below: