My respects to you, professor..on this occasion, I read some information about the Philippine Islands...you have a lot of patience and pleasure in helping people understand the working of various electronic circuits, but that comes with time and experience.. in most cases, those with too much experience in the field of radio-tv repairs are interested in the detailed explanations.I also fall into this category, although I solve the small household repairs myself (the control board from the Whirpool automatic washing machine, the electronic board from the gas boiler-replacement of the non-polarized capacitor of 0.1 micro / 400 volts; the power supply of the computer of 450 watts-voltage of 5 volts is missing...small repairs in my free time, never at a professional level, like you)...but, with your kindness to explain in detail and with my little knowledge about this field, I hope to solve small problems at home...for this fact, I remain indebted to you and I promise to follow as many of your presentations as possible, adding a "big thank you" and, of course, the "like" button...gods bless you take care and good health, I wish you many more dollars in your account from customers satisfied with the repairs made by you
Bellissimo video complimenti 👍 una domanda: I due diodi in parallelo e in corto che hai levato che tipo di funzione hanno, considerando poi che li hai sostituito con il diodo 460? Perché da due a un diodo? thank you so much👍
Thanks for this deep troubleshooting, I have 75' Vizio flat screen with three busted capacitor in the power board, I replaced the 3 capacitor but the TV will still not come on though the capacitors rating was 68uf 450 but I was able to get 47uf 450 to replace them but still not working no single light anywhere
Sorry for saying this but Mr. Tevz, your soldering iron and solder wire both are of very bad quality, see the amount of slag when the wire melts and also try to do clean soldering, when TV is opened it should be difficult to tell if TV has been repaired or not. Thank you for lovely videos 👍👍👍
Welcome to switch mode hell, you have to change parts by the handful. Why leave out the Zener? TVs seem to live a long life, I assume in the Philippines.
Dijo que no lo reemplazaria, pero si llegara a venir una tensión de gate que supera la que soporta el fet este se puede poner en corto, pero algunos lo tienen y otros no .
What is the backlight voltage when set is in standby and voltage when set is turned on.At the beginning you said voltage was 60v and should go up but later on i saw the the same voltage on the meter when you said set was now working.Pls clarify or did i miss something.thank you
Good morning Tevz. Hope you are good. Thanks for these updates in led tv inverter. I have 2 questions as usual. 😊 How do you know the polarity of the ultra fast diotes. Why you scratch the board to weld it on the ground. And not on the original soldering. And also why you join these soldering on 1 side to the ground. Why ziner diotes didn't replace.? I think ziner allow only a minimum voltage reverse. Because you didn't have the exact omh resistor. That's why you left the ziner Empty. If you had replace the ziner diote the voltage would go through ziner and won't reverse amount voltage back. May be am wrong also.🙏 Only you can help me to understand the circuit. Whereas me I have think 🤔 within my knowledge that I know. Have a good day Sir.
I scratch it to remove the varnish so the lead will flow, there is a polarity note where the anode of the diode goes. The zener diode use only for protection to the pwm driver. 0.17 ohms . Close to .33 ohms. If you put 2.2 ohms that's not going to work.
Yes, the Zener diode uses to regulate voltage. But the job of the Zener here is not to regulate voltage. This is to prevent a high voltage from entering the PWM driver controller. just like when the mosfet was damaged or got shorted, the Zener diode will do the work, it will get shorted and the high voltage now not going into the driver. So then the driver is will be ok. The Zener diode is about 18 volts. When the next time the mosfet gets shorted without the Zener diode the driver may also be damaged. I hope you understand.
