Comments on: Microwave Oven Back To Life

By: Tito Kanshulu

Tito Kanshulu — Thu, 04 Sep 2025 15:08:05 +0000

Excellent repair Sir Imoudu, however, in your article you didn't explain how you contained the high voltage stored in the high voltage capacitor during the taste. All in all, keep the fire burning

Likes(0)Dislikes(0)

By: corriette

corriette — Wed, 03 Sep 2025 12:15:48 +0000

good job. patience is key in solving any appliance.

Likes(0)Dislikes(0)

By: AdamS

AdamS — Mon, 01 Sep 2025 10:59:31 +0000

In reply to Imoudu O.

Good repair Imoudu, but you must replace that 5W 3.3K resistor you used with the correct 10W as soon as you can. If the 5W gets too hot, it will potentially cause a fire.

Only ever go up in power rating - never down!

Likes(1)Dislikes(0)

By: Nazir

Nazir — Mon, 01 Sep 2025 05:48:11 +0000

Great perseveration for this type of fault ,good job Imoudou

Likes(0)Dislikes(0)

By: Imoudu O

Imoudu O — Sun, 31 Aug 2025 18:33:58 +0000

Muykit,
I can't really say what function those resistors play,however the 220V board is decided into two circuits: input and output,the resistors are on output side,logically when both two resistors got open and output voltage drops to 25Vac at transformer input pins(+ & -),one would assume the faulty resistors have to do with the transformer logicall,hope you understand what I am driving at.
However I am yet to investigate this assertion.Thanks

Likes(0)Dislikes(0)

By: Muykit

Muykit — Sat, 30 Aug 2025 23:01:56 +0000

A worth noting article, senior technician, Imoudu. Though with lack of a reminder for goodness sake, for the need for one to be overcautious of the emitted harmful rays that should never leave the oven interior, while testing the door switch as the door is opened. I think 220 VAC is what should have been the voltage readng during the temporary transformer disconnection test. A lower voltage reading when transformer is reconnected definitely calls for investigation. And also my understanding is that the two resistors that you directed my attention to, may well be serving the vital purpose of safeguarding the magnetron in instances of overcurrent flow, I hope the replacement resistors will play the designed role with an equally stunning efficiency. I'm a student-participant in this article observation, thats all the more reason why I stand corrected as per my expressed own personal views. Many thanks brother.

Likes(1)Dislikes(0)

By: Imoudu O

Imoudu O — Sat, 30 Aug 2025 20:46:07 +0000

To all: I appreciate all your comments,have a nice day all

Likes(1)Dislikes(0)

By: Imoudu O

Imoudu O — Sat, 30 Aug 2025 20:43:56 +0000

To: Parasuraman.S and Albert.B

Thanks for your comments and observations.l was lucky to have a scrab of same board,on which I got to know values of the two resistors,(20W/.15R and 10W/3.3K) however 10W/3.3k resistors on the scrab was also open,so I used 20W/.15R from scrab for replacement and replaced 10W/3.3K with 5W/3.3k b/cos I can't get its original wattage value from sales store.

Likes(1)Dislikes(0)

By: Mark J

Mark J — Sat, 30 Aug 2025 20:11:13 +0000

Imoudu well done on the repair. Thank you for sharing.

Likes(0)Dislikes(0)

By: ANTHONY PATERSON

ANTHONY PATERSON — Sat, 30 Aug 2025 19:52:52 +0000

In reply to ANTHONY PATERSON.

Furthermore, the value of the resistor could be closely approximated by measuring from the end-cap to the break on either side, then add together to get the ohmic value.

Likes(2)Dislikes(0)