Question about LG Televison & Video
Lg crt tv stats and goes off more output from powersupplay str 6654 , optocoupler repaced but no result Check all the related components to the STR. Any one or more resistors or zener diode can poise ...
...present, your problem has been solved, if you turn on the tv and hears little clicks, replace the optocoupler of the power supply. i did it and got my tv back on
...- 7522 = transistor BC847B - 7521 = transistor STP10NK80ZFP - 6526 = diode BZX384-C22 - 7515 = optocoupler TCET1104-G - 3526 = resistor (0.15R). - 3526 = resistor (0.22R). If you need more info ...
...of the surge. If the damage is serious, for example burn marks/large cracks on the board, and the optocoupler is destroyed, the whole set would be uneconomical to repair. You can never predict when ...
...drop to normal, check power supply components or replace the STRX6750. Don't forget to replace the optocoupler
...meter to test the voltage. If +b is absent then the freq trigg for the smps is absent, check on the optocoupler/ the transformer solderings. Attempt to service only if you familiar with electronics ...
...primary driver transistor and the associated components (some diodes and capacitors, resistors, an optocoupler maybe) and the rectifier diodes (or a bridge) and capacitors at the transformer ...
...to get proper secondary low DC voltages needed to the circuit board. Check all the transitors. Of optocoupler is used check it also. Check its DC side control drive transistors. Check all the zener ...
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