Comments on: Level Shifter ICs Found Defective In Videocon LED TV MODEL LEDVJW32HH-2FA A1

By: nader bahrami

nader bahrami — Fri, 14 May 2021 20:27:04 +0000

hi sir
Parasuraman S
Hello dear colleague. This is a disadvantage of the panel and its side connections because the side information is inserted with the IC and sometimes interrupted, which can be replaced with a car bonding device. In some models, where there are no side ICs, you can disconnect from the lower ICs, but the high-resolution image is not very accurate.

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By: Winston

Winston — Fri, 30 Apr 2021 21:30:18 +0000

In reply to Parasuraman S.

I am also interested in solving this jitter problem. Do you need an oscilloscope to check input and output signals to these IC's? Which repair guide version details this process for me? Do I need a 200MHz scope? I don't want to buy one and find there is an easier way to solve this problem!

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By: Parasuraman S

Parasuraman S — Fri, 30 Apr 2021 13:06:49 +0000

In reply to Yogesh Panchal.

Yes, you are right Yogesh! We use liquid flux only. Your caution is noted and we shall take care! Many thanks for your comments!

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By: Parasuraman S

Parasuraman S — Fri, 30 Apr 2021 13:05:18 +0000

In reply to William Shaw.

Most of the voltage details on scaler board, T-con board, power supply board and main boards are known to my techie friends who are experts as they handle around ten cases per day.

Many thanks for your comments!

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By: Parasuraman S

Parasuraman S — Fri, 30 Apr 2021 13:03:22 +0000

In reply to ombra32.

Kindly see the first picture. Since posting a video is not possible, nor is it possible to capture the fault as it is too fast, I have provided a description. The problem was shifting of pictures from bottom to half screen and horizontal lines blocking half view. Many thanks for your comments!

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By: Parasuraman S

Parasuraman S — Fri, 30 Apr 2021 13:01:02 +0000

In reply to Albert van Bemmelen.

I had not done any cutting tracks in this case. My friend changed the panel with an old one as mentioned by me in the article, which had some minor problems only. Many thanks for your comments!

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By: Yogesh Panchal

Yogesh Panchal — Fri, 30 Apr 2021 08:14:30 +0000

Sir,
As you are well aware about Panel cost. it is very high compare to the New Unit be careful while removing those SMD IC which are soldered by lead free solder.use a good quality Flux(AMTECH Flux 213 or 559 Flux liquid or gel )or any other brand and temperature controlled rework hot air station.
damaging those Hair line traces are worst thing to repair without Microscope camera.

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By: Humberto

Humberto — Thu, 29 Apr 2021 14:41:10 +0000

In reply to Albert van Bemmelen.

Hi Albert, I´ve watched some videos of TV repair and they give the total solution by cutting some tracks in the T-Com Card; but I do not understand this yet.

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By: William Shaw

William Shaw — Thu, 29 Apr 2021 14:10:35 +0000

Does your techie friend use schematics to troubleshoot? It would seem that the vast variances in models would make it very difficult to troubleshoot without it.
Thanks for the info,
William

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By: ombra32

ombra32 — Thu, 29 Apr 2021 11:57:11 +0000

I'm sorry, but I don't understand.
What was the problem and how was it solved?

Regards,
Marco

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