Intermittent On-Off Problem Solved In CASTOR Induction Cooker-CT-DIVA60
This induction cooker (hereinafter referred to as IC for brevity) belonged to the Grocery-Vegetable-Bakery shop situated opposite to my house. It was brought to me by the lady assistant mentioning that it gets off and on and sometimes did not heat. You can perhaps observe the condition of the cooker from the second picture above.
Even the centre portion, where the vessels are kept was as dirty as the cellophane paper that covered other areas! I opened the IC and cleaned inside thoroughly, which was a mess of cobweb, dust and dirt:
The last picture above is that of the two AC IN wires which were found to be charred with burning marks on the board. After a thorough cleaning of the inside, the fan, board, control panel etc., I looked for the trouble making components.
Though it looked like intermittent or insufficient contact (which means straining current flow) of the AC in wires, on further investigation, there were plenty of trouble making components in the board. After removing, cleaning and resoldering the AC in wires, I combed the primary and secondary of the board and replaced the electrolytic capacitors, the large Black capacitor across the coil, high value resistors apart from 8050/8550 transistors. Then retouched both the main board and control panel board and checked/re-checked for any man-made shorts. Cleaned the boards thoroughly and connected the coil and kept it on a ceramic top, which I use for testing purposes. When powered on, I noticed that the fan was not freely rotating even though I had opened its seal and lubricated. So, replaced that also, upon which the IC passed the bench test, as per picture proof produced below:
I had already cleaned the top so thoroughly that it looked and shined like a new IC, thereby getting a chance to pat myself! (LOL).
After testing it in my kitchen a few times, it was delivered to the shop, where it was demonstrated to their satisfaction. Mission accomplished, which got qualified for an entry into the satisfaction bag.
I did not collect the charges then and there, but opted to deduct it from the monthly bill of the account we had with them, to give a guarantee for satisfactory function of the IC, which the shop owner accepted very reluctantly!
This article was prepared for you by Parasuraman Subramanian from India. He is 76 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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Albert van Bemmelen
August 29, 2026 at 10:42 pm
Another exccellent repair with a satisfying mutual benefitting result. That IC sure looked like a new cooker afterwards! If I understood you right this time the 8050/8550 transistors were not replaced?
Parasuraman S
August 30, 2026 at 11:27 am
I did replace. Please read this sentence: "I combed the primary and secondary of the board and replaced the electrolytic capacitors, the large Black capacitor across the coil, high value resistors apart from 8050/8550 transistors." Looks like you have not read the article fully before making comments. Many thanks, dear Albert!
Mark J
August 30, 2026 at 2:07 am
Parasuraman great job. The Induction Cooker looks like new after you cleaned and repaired it. I have never had the opportunity to work on one yet. Thank you for sharing.
Parasuraman S
August 30, 2026 at 11:28 am
The best way is to get one from the scrap collectors and try to make it work, so that your long pending wish can be fulfilled. Many thanks, dear Mark.
Vincenzo Gaetano Coppola
August 30, 2026 at 2:10 am
It is so much pleasure to see your passion to repair electronics us still as strong as it was many years ago when I first read a repair by you! Keep it up and i hope im still around to help you celebrate your 150th time around our sun! Bless
Parasuraman S
August 30, 2026 at 11:30 am
Many thanks for your wonderfully charging comments! It helps me a lot!
Imoudu.O
August 30, 2026 at 4:40 am
Well,well,another good fix,ur bag is elastic accommodating all good repairs, like an ocean accepting waters from rivers without getting full,thanks sir
Parasuraman S
August 30, 2026 at 11:31 am
Vow! Good comparison! Many thanks, dear Imoudu!