IGBT And Bridge Rectifier Found Short In Prestige Gas- Cum- Induction Cooker Model GTIC-03L
This gas stove-cum-Induction Cooker was brought by a new customer, a member of our Residential Association. It was reportedly dead. He helped me remove the Induction Cooker Unit from the bottom (hereinafter referred to as IC for brevity, in this article) and took the Gas Stove Back, as per my request. I subjected it to a thorough cleaning before bringing it inside my house.
Since it had a common top, I removed only the bottom portion along with the control panel. The unit was fixed with side clamps, picture of which was forgotten to take.
The IGBT was short, there was a thick wire in place of 15A fuse, the bridge rectifier was found short on one direction between the AC input points, one black capacitor was showing lower values which were an indication of getting short, and one resistor was showing higher value:
I replaced all these components and then all the electrolytic capacitors along with 8050/8550 transistors, 78L05 regulator 18V Zener and IN4148 Diode as the board had rusts and fungus attacks on many places. Then retouched the control board very well. I could make out that this IC had undergone repairs before as the main board was found retouched with fresh solder and a few components replaced. That saved a lot of my time too. Then applied power and observed the IC showing E7 error. Generally, the E7 error could be due to the temperature sensors.
So, I replaced the two temperature sensors on the coil, upon which the IC worked very well. I took it to the kitchen and gave power keeping it well isolated from our IC and boiled a port of water. The IC was found working very well. (I had taken a Ceramic top of a scrapped IC from one of my techie friends in order to enable isolation of vessels. That is what you see in the picture below:
Mission accomplished with grit, determination and spirit gained!
Satisfaction, therefore, jumped into the collection bag without waiting for a nod from me! (LOL)
P.S. I informed the customer not to bring the gas stove again and offered to go to his home and fix the IC back on its top like before, which was very much appreciated by him.
This article was prepared for you by Parasuraman Subramanian from India. He is 74 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 article on Cracked Capacitor Caused Crackling Noise In Philips Valve Radio 15RB708/00S
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Waleed Rishmawi
June 22, 2025 at 6:07 pm
Good job my friend. A wire in a place of a fuse is what I see a lot in devices no a days which actually destroying the devise not making it work better sad to say. Have a blessed day
Parasuraman S
June 22, 2025 at 9:23 pm
Yes, you are right, dear friend! But that helps us get sets! (Ha! Ha) Many thanks!
Albert van Bemmelen
June 22, 2025 at 8:40 pm
That were a lot of defect replaced parts this time! But again none of them could have fould you not being able to finish this repair successfully!
Parasuraman S
June 22, 2025 at 9:25 pm
The thrill what we get when we restore such a written off case set, is unmatched! Many thanks, dear Albert!
Mark J
June 22, 2025 at 11:56 pm
Parasuraman good job on the repair.
Parasuraman S
June 23, 2025 at 3:11 pm
Thanks, dear Mark!
Yogesh Panchal
June 23, 2025 at 1:02 am
Good Job! Sir
Repair is joyful when we have spares available with us.
Parasuraman S
June 23, 2025 at 3:12 pm
And vice versa, when we do not get! Many thanks, dear Yogesh Bai!
Humberto
June 23, 2025 at 12:52 pm
Good repair, as usual. I always say you are a Master
Parasuraman S
June 24, 2025 at 10:03 am
Many thanks, dear Humberto!
Imoudu
June 24, 2025 at 4:43 am
Good job sir,however I wonder why you see that resistor as on higher value,if its color code, red,black, black,orange,gold...that's 200kilo ohms with + - 5% tolerance,going by what ur metre is reading, I think that value is still within tolerance level and it can be said it's good.
Parasuraman S
June 24, 2025 at 10:41 am
Higher value of resistors would affect required current in the circuit. So, we may have to adjust its value to suit the circuit. Many thanks!
Jim
July 16, 2025 at 8:34 am
Great Repair! .. I enjoy your articles!