Track Cutting Solved A No Display Problem In EGO LED TV E-3211
This TV was brought to me with the complaint that there was no display. After opening and cleaning the inside, I checked the voltages and found these to be ok. Even the voltages to the Scaler Board were ok. But output from the following IC was totally absent. When switched on, it just comes as a flash and the IC goes to protection mode. There were no shorts of caps in the board when checked.
Consultations with my techie friends confirmed that there were some shorts inside the panel.
Following is the picture of the scaler board showing the CKV lines.
I was advised to cut two lines on any side of the board and see. If the IC does not come out of protection, the other side was to be cut. Once the Voltages come properly, the other side tracks were to be rejoined, as the culprits were on the side which was cut last.
After rejoining the other side, when I applied power the display came and the picture was of good clarity.
I allowed the TV to run for several hours before I closed the back cover and kept it ready for delivery to the customer.
Following is a close picture of a thin line that would come, because of the track cut, which anyhow does not affect proper viewing.
According to my friends, the single cof boards such as these do not have long life and the panel might go bad again. I kept the customer informed of the true status before giving delivery.
Anyhow, satisfaction did not find any excuse not to jump into the collection bag! But let me be honest, I have no thrill in doing such service work!
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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You may check on his previous article on MUD DAUBER WASP FORCED ME TO BREAK OPEN SANYO BIG-100K RADIO CASSETTE RECORDER