Why The Failures Of Speakers In LCD/LED TVs Are High?
Perhaps those who handle LCD/LED TV service would agree that failures of the speakers in these TVs are more. Mainly because of the small sized speakers crammed into a box or covered space and the customers’ tendency to increase the volume to full! Anyhow, technicians like us get the benefit as the work is easy to carry out and we can earn a decent income too!
Case (1) Videocon LCDTV-VDL32HBL-FLB : This TV belonged to a family friend and he brought this with two complaints. One was that the on/off switch was not functioning and as the TV does not work on remote due to an internal problem in the uController that happened after a lightning strike long back, it was very difficult to operate this. Second was that the sound also became totally dead.
I replaced all the press to on buttons on the control panel and replaced the speakers as these were found open. But one channel was still not working, as the sound IC had developed some internal problem. Since the TV was already in bad shape and might require a panel replacement, he did not want to spend more money on this. Hence I closed the cover and tested the TV in front of him for an hour, before he carried it back:
Case (2) Samsung LEDTV-UA32F4100AR : This is the TV, which houses two tiny speakers internally wired inside a box and the contacts are established through the fixing screws. I removed the paper torn speakers and took it to the market for getting exact replacement in size, ohms and watts, which was 6 Ohms and 10W.
After fixing the screws, I fed video and tested it for hours together at full volume before closing the cover and informing the customer to come and pick it up.
Double missions accomplished successfully and satisfactions to the power of two got added to the collections!
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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Arun Kumar
April 6, 2024 at 5:27 pm
This problem is common even in LG, T Series and many more.
But I have seen very few cases in Panasonic and Sony TV
Parasuraman S
April 6, 2024 at 10:31 pm
Many thanks for your comments and inputs!
Yogesh Panchal
April 6, 2024 at 5:29 pm
Good Job! Sir,
Small switches are always make some resistance instead of Beep over period of the time & total time vest for fault finding if switches are more in numbers in the control panel. Speaker's are going bad because of bad quality of paper cone.
Parasuraman S
April 6, 2024 at 10:32 pm
Many thanks for your comments and inputs!
Tayo
April 6, 2024 at 5:55 pm
Thank you for the Public Service Announcement Sir!
I remember the first time I even heard of a shorted speaker causing a TV not to work.... I heard it from YOU.
Luckily I have never run across such a problem but the solution will be in the back of my mind in case I do.
Well Done
Parasuraman S
April 6, 2024 at 10:33 pm
Many thanks for your comments and inputs!
Albert van Bemmelen
April 6, 2024 at 7:22 pm
Since speakers become flatter and flatter there is not much space for a good bass box in tv sets. And DSP tricks are used in smartphones to emulate good sounding polyphone frequencies in those low Q factor speakers.
To protect my 80 Watt audio box speakers from blowing through their internal speakers coils I use special thermal fuses that in seconds prevent a too high flowing current. With this calculator from this German seller, and two of those protecting self restoring PTC resistor 'fuses' (after cooling down), I now never have to worry that my expensive Elac speakers (that are no longer made and so not available anywhere either!) blow up to kingdom come again! => https://www.lautsprechershop.de/hifi/ptc_en.htm
Parasuraman S
April 6, 2024 at 10:34 pm
Many thanks for your comments and inputs!
Waleed Rishmawi
April 6, 2024 at 10:59 pm
I have not encountered any speakers fault on any tv for some reason. I usually collect them as spare parts but I never had the chance to use the so I gave them to the recycling center in our town. Have a blessed day and thanks for sharing
Parasuraman S
April 7, 2024 at 2:50 pm
That's strange! May be, you have some control on noise pollution in your country or area! Here if you enter an apartment, it will be like a hell!
Imoudu.O
April 7, 2024 at 5:05 am
I was surprised to see 3 years old original lg 32" tv with torn speaker cone, i fine it difficult to believe it. Have a nice day sir.
Parasuraman S
April 7, 2024 at 7:37 am
Thanks for your comments and inputs!