A LG Smart TV Remote Control Repaired
This was brought to my shop for repair. It was working fine but even it was replaced with new batteries, it lasts for only a few hours and then shuts down and also mentioned that the batteries become very hot when installed in the remote.
It is clean and nice on the outside but when I tried to put some batteries in
there and check it out, I saw the big surprise….
It was nasty and it seems like batteries exploded in there but the problem was not just on that side; check the other side
Since it was working fine but the batteries become hot issue I decided to give it a clean and hope for the best.
I cleaned the whole remote control with IPA and then gave it a try. It was working fine still but the batteries were getting really hot. It seems there was a short somewhere on the lower side of the remote.
I took my multi meter out set to diode mode and started checking for shorts. It did not take long search because I found the short right away. It was a bypass SMD capacitor that was getting really hot when installing the batteries. Once I removed it from the board, the batteries were ok and it was working for a long period of time. Since it was working fine and it was only a bypass capacitor, I did not bother to replace it with a new one. I re soldered all the parts there and called it a successful repair.
Mission Accomplished.
This article was prepared for you by Waleed Rishmawi, one of our ‘Master Authors’ and currently working in the Bethlehem area of Palestine repairing electrical and electronic equipment.
P.S- Do you know of any your friends who would benefit from this content that you are reading now? If so, forward this website to your friends or you can invite your friends to subscribe to my newsletter for free in this Link.
Note: You can check his previous repair articles in the link below:
https://jestineyong.com/shorted-diodes-found-in-makita-battery-charger/
(52)Dislikes
(0)
19 Comments
Leave a Reply
Albert van Bemmelen
March 8, 2021 at 6:40 pm
Yes these things happen quite often to these smd type of capacitors. Also in laptops causing shorting currents that even prevent the computer to start at boot up.
Waleed Rishmawi
March 9, 2021 at 8:34 pm
Albert: yes totally agree. I find these smd capacitors faulty in many devices causing the device not to start. they are called by pass capacitors and I do not have to replace the device most of the time works without them. have a good day
Oghene
August 15, 2024 at 3:22 pm
Please how do I locate the SMD capacitor?
Mark
March 8, 2021 at 6:48 pm
Well done Waleed - a good find!
Waleed Rishmawi
March 9, 2021 at 8:34 pm
Mark: thanks man. have a good day
Parasuraman S
March 8, 2021 at 7:31 pm
That was a well determined fix! Many thanks for sharing!
Waleed Rishmawi
March 9, 2021 at 8:35 pm
Parasuraman: you are most welcome my friend have a blessed day
Oghene
August 15, 2024 at 3:24 pm
How do I locate and bypass the SMD capacitor? Thanks
Yogesh Panchal
March 8, 2021 at 9:31 pm
Waleed,
Nice quick fix.
Waleed Rishmawi
March 9, 2021 at 8:35 pm
Yogesh: it was not quick but it was fixed. thanks and have a blessed day
Lynn Blakely
March 9, 2021 at 3:40 am
Good Job Waleed: the diode check function can find several problems, not just check diodes.
Waleed Rishmawi
March 9, 2021 at 8:36 pm
Lynn: thanks man. have a blessed day
Tayo
March 9, 2021 at 10:34 am
Thank you for this! I never knew about testing for shorts using the diode mode. A quick search and I am a bit more enlightened.
Waleed Rishmawi
March 9, 2021 at 8:37 pm
Tayo: you are most welcome. I am glad you learned that..it is a handy tool for finding shorts. have a blessed day
George Nutzul
March 9, 2021 at 2:52 pm
Well done, and thanks for sharing! I was surprised there was a bypass cap in a battery operated remote... I wouldn't think there would be a need for one. Thanks for the time you put into the article.
Waleed Rishmawi
March 9, 2021 at 8:38 pm
George: thanks man. welcome to LG my friend. have a blessed day
Ahmad
August 14, 2021 at 11:38 pm
Hi..may I know do test the smd capacitor good or not?
Babak
January 19, 2022 at 3:28 am
Im fram iran
What's your name smd u5 magic control lg please
Enrique
March 30, 2023 at 7:14 am
Nice work, I have a problem, somehow while oppening the remote to clean the keyboard the U5 IC broke, it is missing. The controller is not working, I assume this is due the U5 missing. Can you give us the code of this IC? Thanks!