Comments on: SMPS Transformer Failed In OPTONICA CS-5151A CRT TV

By: Kunal

Kunal — Sun, 16 Feb 2025 15:38:56 +0000

we had sharpline optonica assembled by kalyani sharp bought in 1992 , its picture smoothness/clarity was top notch, only sound was dissapointing as it had a mono speaker. Dad had bought it for 17,000/- inr in 1992.later on we changed it with a samsung plano, which even though being the latest model did not match the smoothness/clarity of 1992 sharp, but gave an upgrade in sound quality with stereo superbass sound.

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By: Collins MAMBWE

Collins MAMBWE — Sat, 09 Jan 2021 11:49:06 +0000

Hello! Please help: How do I tell or test if my FBT is defective on my Hitachi-Fujian TV HFC-14P69 using a DMM? LED is ON but TV is not responding to buttons or remote.

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By: Franklin

Franklin — Fri, 02 Oct 2020 06:06:28 +0000

In reply to Parasuraman S.

Good day sir. I love your works and I appreciate you so much.

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By: Parasuraman S

Parasuraman S — Mon, 28 Sep 2020 13:26:21 +0000

In reply to Yogesh Panchal.

Its my friend's customer. I have borne the cost because of him. Anyhow I got one good working board!

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By: Parasuraman S

Parasuraman S — Mon, 28 Sep 2020 09:22:20 +0000

In reply to Eric Rice.

Vow! That's good to know! All the very best to you!

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By: Eric Rice

Eric Rice — Sun, 27 Sep 2020 19:09:14 +0000

In reply to Parasuraman S.

Like you, I always notify the customer before proceeding so that the cost is understood. Learned electronics while in the US Navy many years ago and I now own a small musical amplifier repair shop, and I also manufacture amps as custom builds for musicians. It is just myself, but well enough to keep me busy. Thank you for your comments!

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By: Yogesh Panchal

Yogesh Panchal — Sun, 27 Sep 2020 17:27:13 +0000

Sir,
Our let go practice make this type of customers more habitual.some time equipment's are non repairable because of unavailability of parts so what about our Time /efforts......always bound customer if he doesn't want to repair the unit after starting the diagnosis process he have to pay minimum diagnosis charges.

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By: babums

babums — Sun, 27 Sep 2020 14:13:28 +0000

Sir,
your fault finding way is very excellent,as I am beginner it is very useful article for me.The circuit may please be given to test SMPS transformer out side made by your self.

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By: Parasuraman S

Parasuraman S — Sun, 27 Sep 2020 11:18:42 +0000

In reply to Imoudu.

Yes, the B+ rail that goes to that pin, and returns to the collector of the Horizontal Output Transistor, which is pulled down by the Transistor to ground at high frequency to generate the oscillation.

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By: Parasuraman S

Parasuraman S — Sun, 27 Sep 2020 11:15:22 +0000

In reply to B. Scott.

The cost of this repair in us $ would be around 18-20 $

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