Burst Capacitors Found In AFTRON LCD TV
This TV belongs to my relative staying around 20 Kms away from my home. She brought it to me with the complaint that there were some electrical faults in their house, after which this TV became dead. As usual, first duty is to open the set and do a thorough cleaning. This set had around 18 screws on the back! I saw mud inside bottom of the TV, which had peeped in during the floods that hit their house, which is near a river. This TV was lying dipped in the water up to the speaker level, after which, one electrician dried the TV in hot sun for many days before venturing to switch on.
It was working when they tried and served them well until now. The remote control got lost in the furious floods, that were swirling around the house. (The family was rescued and moved to a faraway place and could return only after a week or more).
The above two pictures would show you how much mud had got stuck inside. I cleaned the inside thoroughly using various brushes and blower and also cleaned the speakers well.
I saw two capacitors burst on the power supply board, saw burning marks also under the main filter capacitor. Replaced all the electrolytic capacitors in the power supply board.
I also replaced the micro switches on the panel, as these were found to be defective. As no remote control was available in the market for this set, controlling from the panel was the only way.
Checked for any strained components on the mother board. Checked ESRs of all the electrolytic capacitors on that board and found these to be ok. Hence reconnected the PCBs and applied power. The TV worked fine! So, fit it back and left it for trial run by my wife, who used it for a few days until my relative came to pick it up!
These are the defective components replaced:
No, no, I will not forget; this double satisfying job also got collected to the bag!
This article was prepared for you by Parasuraman Subramanian from India. He is 69 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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You may check on his previous repair article below:
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10 Comments
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Albert van Bemmelen
July 23, 2019 at 7:00 pm
Another job that required a lot of experience but also a lot of cleaning! Something you always do with great care and patience!
Yogesh Panchal
July 23, 2019 at 11:30 pm
Good job! Sir
Robert Calk Jr.
July 24, 2019 at 5:03 am
Good job, Parasuraman!
beh
July 24, 2019 at 10:01 am
Like your other articles also this time you put time and effort to rescue this TV. God, bless you. and thanks
Ghashaan
July 24, 2019 at 10:33 am
A great repair! Electrolytic capacitors are the most frequent culprits.
Waleed Rishmawi
July 25, 2019 at 12:29 pm
Good job my friend. I am sure this family were happy with their tv up and running. Keep up the good work.
Parasuraman Subramanian
July 26, 2019 at 1:19 pm
Yes, they were! They even thanked me again when we met at a family function held recently! That's the returns we get, which serves as fuel for our continued service!
Shedlite
July 27, 2019 at 12:54 pm
Good job sir, I from Nigeria, you have proven the sacrifices of humanity service!
Charles karonga
September 8, 2019 at 11:40 pm
I always follow your great work sir your repairs always rejuvenate my spirit to do more on my work that I would otherwise giving up.Well done
Dissanayake
August 24, 2020 at 11:51 pm
How to aftron tv aflcd3252ahd, without unlock pl help me