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LCD TVs - LED
68913302_483763932458414_4741093176897437696_n.jpg [118.64kb] 68913302_483763932458414_4741093176897437696_n.jpg [118.64kb] 69017623_509816009795829_2699557082075496448_n.jpg [86.98kb] 69644384_634161870320837_1888931964015083520_n.jpg [82.99kb] in the line of returns of the bars of the LEDs place a resistance of 12 ohm x 3 watt as they are in the photos and no more comes back for burned and low led the intensity
Lower backligth voltage on tv TCL l55p4ksilver
169
hace 5 años
hace 5 años
Hello colleagues, again I ask for your help to solve this problem. This TCL l55p4ksilver Smart tv brand TV has already been repaired twice why the factory backlight LEDs are burned and has just returned with the same inconvenience, my question is if anyone in the community knows if the voltage to the LEDs can be lowered from service mode and what parameters to modify or how to manipulate the power supply with the integrated oz9976agn that is in that stage. Thank you in advance for your time and dedication
2.372
hace 5 años
hace 5 años
Greetings, another option would be in addition to the one commented by the colleague to increase the resistance that goes from Source to gnd of the mosfet of the driver circuit of the LEDs. But none of this guarantees that other LEDs will not be broken again, unless you do not replace them all, they have a limited lifespan and if some have already failed some others are close to fail too, the greatest guarantee is to change all. Greetings and luck
1.821
hace 5 años
hace 5 años
68913302_483763932458414_4741093176897437696_n.jpg [118.64kb] 68913302_483763932458414_4741093176897437696_n.jpg [118.64kb] 69017623_509816009795829_2699557082075496448_n.jpg [86.98kb] 69644384_634161870320837_1888931964015083520_n.jpg [82.99kb] in the line of returns of the bars of the LEDs place a resistance of 12 ohm x 3 watt as they are in the photos and no more comes back for burned and low led the intensity
169
hace 5 años
hace 5 años
After a few days of working this TV the solution if it was to modify the discharge but instead of placing a resistance it was to remove a few since it had many resistors forming 4ohm and with just taking out R623 and R624 it was under the voltage of 120v to 110v very stable and takes time working without failures and low temperature. I thank you all for your time on this subject
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