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Tube TVs
lg tv model 21sb1rl-l4 led stanby ni the television
132
hace 5 años
hace 5 años
lg tv model 21sb1rl-l4 chassis cw81b. does not turn on the stanby led or el.tv. starting to measure disconnect the b + and I only have 49 volts. therefore the tv is impossible to turn on with this voltage and change the ic810 str w6554a and some stanby elled filters occasionally turn on I hope your help.
hace 5 años
friend, you have to check the resistance of the source, not the measurements mounted on the plate, take them apart and measure them ..... check the transistors and resistors that work with the optocoupler ... also check the filters of the line + b
30.814
hace 5 años
Hello Friend. At what stage of the tv. You changed the filters and what items you checked with the tester to try to fix the tv's fault.
hace 5 años
hace 5 años
hello the tv is a LG ultraslin I suggest you straiga the fly back and after this connect the tv and measure the voltage on the + B that is 130V and see if the voltage is altered if this happens replace a 91K resistor in the secondary from the source that opens after this comment
30.814
hace 5 años
hace 5 años
Hello Friend. Check at the source. resistors, zener diodes and rectifiers, and change the small filters to new ones and change the opto coupler and solve the choper and flayback pins and then after the choper check the resistors and the diodes and filters to the filter can be undervalued or diode with leakage or underrated resistance and check the tsh. The pins of the IC can be short and solved. vertical. Cheers
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