Failure Of A New Induction Cooker Board Resulted In Restoration Of Butterfly Model Premium
This induction cooker looked like have developed a habit of visiting me every three years! I repaired this in August, 2016 and again in September, 2019. Here it was brought to me in August, 2022! Kindly see my previous articles:
Induction Cooker Repair | Electronics Repair And Technology News (jestineyong.com)
This time, anyhow the IC (abbreviated for Induction Cooker!) was found in a very bad condition. The top ceramic plate had come off! Customer as usual reported to me that these are handy work of his mischievous children. Well, professionally commercial technicians might consider such children as their potential agents, similar to lizard and other pests that damage electronic devices!
Because of the reasons that this board had undergone repairs before, I suggested replacement of the board by a new one, which is now easily available in the market. I heard that even new board with touch buttons is now available, though yet to see one. I removed the old board, panel and cleaned the inside of the IC very well. Then fixed the new board, with its panel kept on one side.
Lubricated the fan and fixed it in its place. Kept the coil on top and completed interconnections and switched on, after keeping the ceramic plate and a stainless steel vessel on top with little water in it. On switch on, the LED segment blinked with repeated beeps, which is an indication of power complaints in the board. After a few seconds, one resistor in the primary power section burst! After rechecking that every connection was proper, and there was no load from the fan either, I replaced this resistor. Then checked the diodes and transistors on the board and found these to be ok.
After making futile attempts to revive the new board, I kept it aside for detailed study. Then checked the old board and ascertained what went wrong with it. Conducted cold tests and found out that the control buttons are either leaky or open. The ESR of one 10uF cap was out. The small disk caps were out of range. So, replaced all these.
The mains cord was found to be dangerously exposed at the connection end, near the rear of IC. It was found twisted too! I replaced the mains cord with a new sturdy one rated for 15A use. I had already checked for any defective components on the main board and went ahead with the restoration work only after that. After cleaning the boards thoroughly, I assembled everything back temporarily and kept the ceramic plate and repeated my test like before. Bingo, it was found working very well! Checked it by prolonged use, keeping aside our IC far away and ensured that it was working very well. Then fixed the board and other screws very well.
Provided extra washers on top of the buttons to ensure that press to on work smoothly when operated from its control. The button switches with exact height of lengths are difficult to get. Used double sided LED backlight fixing high temp withstanding tapes and affixed the ceramic plate in its place.
Anyhow, work accomplished very satisfactorily, leaving aside one new board to be trouble shot later.
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.
Please give a support by clicking on the social buttons below. Your feedback on the post is welcome. Please leave it in the comments.
P.S-If you enjoyed reading this, click here to subscribe to my blog (free subscription). That way, you’ll never miss a post. You can also forward this website link to your friends and colleagues-thanks!
You may check on his previous article on Changing Backlight Of Thompson UHD LED TV 102cm And Panel Breaking Case Of SONY KDL-40W600B
(57)Dislikes
(0)
12 Comments
Leave a Reply
Tayo
October 8, 2022 at 7:47 am
VERY well one Sir! Any guesses as to what went wrong with the new board? Other than to say... they dont make them like they used too!
Parasuraman S
October 10, 2022 at 5:27 pm
What went wrong with the new board is yet to be studied. Many thanks for your comments and support!
Mark
October 8, 2022 at 9:06 am
Hey Parasuraman,
It can be so frustrating when you try a new component only to find that it is faulty! Well done on your diagnosis and repair
Parasuraman S
October 10, 2022 at 5:27 pm
Many thanks for your comments and support!
Waleed Rishmawi
October 8, 2022 at 2:23 pm
Well, professionally commercial technicians might consider such children as their potential agents, similar to lizard and other pests that damage electronic devices!...LOL there is truth to that statement. thanks for sharing and have a blessed day.
Parasuraman S
October 10, 2022 at 5:28 pm
Many thanks for your comments and support!
Yogesh Panchal
October 8, 2022 at 3:29 pm
Well Done! Sir
Parasuraman S
October 10, 2022 at 5:28 pm
Many thanks for your comments and support!
Albert van Bemmelen
October 8, 2022 at 4:49 pm
I guess that testing and fixing the new IC board is difficult without having another defect IC to operate on? These Induction Cookers are nowadays very popular in my country and probably in whole of Europe especially since oil and gasprices are extremely high now!
Parasuraman S
October 10, 2022 at 5:30 pm
Well, that's true. I cannot test it beyond the initial switch on without a coil and top! Many thanks for your comments and support!
Peter Sh
October 8, 2022 at 9:52 pm
Thank You, another amazing and informative article 🙂
Parasuraman S
October 10, 2022 at 5:30 pm
Many thanks for your comments and support!