Longer Time To Get On In LG CRT TV Solved
MAKE AND MODEL: LG 21FU3AG3AZ CRT TV
PROBLEM REPORTED: Takes longer time to get on. But remains ok after that.
TROUBLESHOOTING AND RECTIFICATION DONE: After opening and doing a thorough cleaning of the TV, dismantled the board after discharging the anode. On inspection of the PCB, I found a lot of dry solders. ESR of most of the capacitors in power supply and elsewhere were out of range. After replacing all the electrolytic capacitors on the board, and doing a thorough retouching of all the points, connected a 100W load to B+, removing its path to primary of FBT. The bulb lit and voltage was stable and present. Tried switching it on and off a few times and noticed that there was no delay.
Disconnected the load of Bulb, connected the B+ jumper wire to the FBT, reconnected the yoke, degaussing coil, speakers and Video-Audio input board after applying a drop of switch cleaning oil in each and every socket. Applied power and found the TV to be working very well. Adjusted the Focus and Screen Voltages for a peak performance. I was very happy to see the result of the laborious task of retouching the board and replacing all the electrolytic capacitors, which is something I really love to do! Replaced the batteries in the Remote Control. Mission accomplished and satisfaction got added!
HERE ARE A FEW PICTURES:
This article was prepared for you by Parasuraman Subramanian from India. He is 70 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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