Yet Another Track Cut Saves One More LED TV, SANSUI MODEL SJX32HB02CTF
This TV belongs to a colleague who works in the accounts section of my hospital. It was brought to me with the complaint that there was no display. The display seemed to have gone off when they switched on the TV on a morning. I checked and found that the back light was ok and there was no display. I opened the TV and did a thorough cleaning inside. Noticed that the circuit and panel were more or less same like the Ego LED TV that I repaired earlier in the day.
So, straightaway I went for checking the voltages to the Scaler Board and outputs of the control IC. Exactly the same way how the EGO TV (covered in separate article) behaved, this IC went to protection mode after a flash of outputs. So, I knew that I had another panel short case.
So, I took my knife and cut the CKV tracks on the left side assuming that in this TV also it could be the problem. But for my disappointment, the problem was on the right side. Voltages got released from the booster IC only after I cut the tracks on the right side.
So, I rejoined the left side. The display was ok and I ran the TV for several hours before closing the back cover.
Though the work was completed satisfactorily and got collected, the thrill was not there as mentioned by me in the other article.
I do not like to do these cutting jobs! But there was no other go!
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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14 Comments
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ANIL KUMAR V K
June 10, 2022 at 10:03 pm
Nice work sir, thanks for sharing
Parasuraman S
June 11, 2022 at 12:32 pm
Many thanks!
Babu M S
June 10, 2022 at 10:07 pm
Good job sir.May I know how to identify the ckv line short, any resistance measurement is possible. Thank you very much for sharing.
Parasuraman S
June 11, 2022 at 12:35 pm
Mostly we can make out this from symptoms. If the ckv track shows abnormal short between ground or the other ckv line, it is a dead short. There are burning methods also, but are not a permanent solution. Sometimes, the panel itself might get totally defective!
Albert van Bemmelen
June 10, 2022 at 11:27 pm
They should appoint you as final quality test engineer to put a stop on manufacturing these bad televisions! At least then you no longer had to fix these poor designed products and maybe got some satisfaction from it too?
Parasuraman S
June 11, 2022 at 12:38 pm
Ha! Ha! They won't let me in, because I belong to the 'perfectionist' class! Many thanks for your humorous comments!
Imoudu.O
June 11, 2022 at 5:12 am
Good job sir, you do not get thrill though,but someone went away with tv smiling. I guess that is pivot of our work. Thanks for sharing.
Parasuraman S
June 11, 2022 at 12:38 pm
Yes, ultimately that is what matters.
Yogesh Panchal
June 11, 2022 at 6:37 pm
Sir,Congratulations! for another Fix.
Parasuraman S
June 12, 2022 at 11:33 am
Many thanks!
Tito Kanshulu
June 12, 2022 at 10:45 pm
Congratulations Sir for another fix.
Parasuraman S
June 14, 2022 at 9:31 pm
Many thanks!
Anwar Shiekh
June 16, 2022 at 10:14 pm
I agree, cutting out bad lines does not feel good.
Parasuraman S
June 21, 2022 at 10:22 pm
Yes, many thanks!