Playing At 100% Volume Continuously Tore The Cone Papers In Haeir LED TV Model LE32B9000
This TV belonged to the hospital where I work. It was brought to me with the complaint that the sound was distorted.
I brought the TV to my home and when I opened and checked up, I saw that the cone paper of both the speakers is torn.
As you can see, the speaker is 6 Ohms, 10W. I ordered for new pair. Got exact replacement. After replacing the speakers, when I checked up the sound level, it was at 100%! Must have been at this level for a prolonged time as a result of which the paper could have got torn.
I did not see any other reason, like quite old etc. I told the maintenance department to take care of this in future. The TV was working perfectly with good audio output.
Your guess is right, satisfaction got collected!
This article was prepared for you by Parasuraman Subramanian from India. He is 72 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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Tayo
September 3, 2022 at 12:29 pm
Built-in TV speakers are usually terrible sounding anyway.
Tell Maintenance to put an order in for a sound bar. 😀
Parasuraman S
September 3, 2022 at 9:19 pm
Many thanks for your comments!
GIFT ELIJAH
September 3, 2022 at 1:20 pm
A good discovery of the faulty speakers and it's replacement with new ones, but after the speakers replacement the volume was at 100%, when the volume control was adjusted did it go below 100%?.
Parasuraman S
September 3, 2022 at 9:19 pm
Yes, the volume was set by me at around 50%. It was good enough! Many thanks for your comments!
Albert van Bemmelen
September 3, 2022 at 4:26 pm
Quick and fast pro repair. I guess that the hospital better should disable the maximum volume setting somehow preventing this from also happening to all other TVs in use. Which would make this a very costly repair in future. Hiding all IR remote controls is probably not an ideal option. And current limiting the power to both speakers by adding a resistor in serie is doable but probably too much work if it involves having to remove all TVs from their position and placing them back after the fix is applied. Anyway... I use these special within +3 seconds reacting selfrestoring after 20 seconds PTCs in my 80 Watt Peak loudspeaker boxes to prevent overloading the coils from burning through which of course doesn't help the cones from damaging in the hospital but does help to safe the speaker coils at maximum power: https://www.lautsprechershop.de/hifi/ptc_en.htm
Parasuraman S
September 3, 2022 at 9:22 pm
Well, as rightly mentioned by you, it is very difficult to do the preventive jobs. I have advised the maintenance staff to keep checking and that is the only hope that they would do. Many thanks for your expert tips and comments!
Babu M S
September 3, 2022 at 10:21 pm
Very fast and nice repair work sir. Thank you very much for sharing.
Parasuraman Subramanian
September 4, 2022 at 3:18 pm
Many thanks for your encouraging comments!
Peter Sheldon
September 3, 2022 at 10:24 pm
I always love reading your articles, certainly my favourites 🙂
Keep up the excellent and very interesting work.
Parasuraman Subramanian
September 4, 2022 at 3:19 pm
Many thanks for your encouraging comments
Waleed Rishmawi
September 3, 2022 at 11:42 pm
Short and to the point repair. Have a blessed day
Parasuraman Subramanian
September 4, 2022 at 3:19 pm
Many thanks for your encouraging comments
Yogesh Panchal
September 8, 2022 at 3:52 pm
Good job! Sir,
Paper cone is get damaged due to environmental effect Heat/Dust/Moisture &
of course output signal power higher than speakers tolerance /specification.
Parasuraman S
September 9, 2022 at 12:03 pm
Many thanks for your comments and sharing of experience!
Rodger Hopkins
October 22, 2022 at 12:05 am
Like your articles, as always nice job.