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Recent content by piotrekn95

  1. P

    [SOLVED] Solving electrical circuit - loop method.

    You were totally right ! I used your advices and solved: Thanks, Regards Peter
  2. P

    [SOLVED] Solving electrical circuit - loop method.

    Hello everyone, I've been trying to solve this circuit : Just to be clear -the single circle with arrow means voltage source, - double circle with arrow means current source (I wrote it here because i know that there are some differencies in some countries etc.) I...
  3. P

    [SOLVED] Thevenin's law - tricky example.

    Ok, I know what i should do with resistors. But now, for example I want to calculate the Thevenin's voltage on A B terminals. Is it possible to use the node potential method ? It will be a problem that I have lonely voltage source in the branch ? Regards
  4. P

    [SOLVED] Thevenin's law - tricky example.

    What do you think about that? Could it be correct? Of course Ra, Rb, Rc will be calculated from triangle/star formulas.
  5. P

    [SOLVED] Thevenin's law - tricky example.

    It's just the symbol which are used at my university to draw a "voltage source".
  6. P

    [SOLVED] Thevenin's law - tricky example.

    Hello everyone, I've been trying to solve this circuit. I have to use Thevenin's method to find the I5 current - so I tried to calculate the Thevenin's voltage and Thevenin resistance. I tried to change the triangle settings of resistors to star, but I don't know if it will help. Do you have...
  7. P

    Solving nonsteady circuits.

    Hello, I am preparing for my circuit theory. I am trying now to solve a basic circuit like this : I know that I could use Laplace theory to do it (with s symbol). But unfortunately this circuit is too tricky for me to begin. I see that if we have DC input, the coil is like a wire, and there...
  8. P

    TV LG RZ 29FB51RX no picture.

    1) Gate of Q401 has 8V. 2) Resistor R407 has 67,5V 3) B+ has 134,6V 4) pin 32 od sda5555 has 3,3V - - - Updated - - - drain of mosfet has 0,1V, source =0V
  9. P

    TV LG RZ 29FB51RX no picture.

    There is 0V, also 0V on R421. Do you think it could be KIA4558 or transistor broken? - - - Updated - - - Also 0V on C416.
  10. P

    TV LG RZ 29FB51RX no picture.

    You're genius. I checked d413 diode and there is 0V. I'm going to check that diode outside fbt.
  11. P

    TV LG RZ 29FB51RX no picture.

    Yes I connected everything.
  12. P

    TV LG RZ 29FB51RX no picture.

    OK, I was checking for bad soldering. And I check the voltage again. I've got +3,3V on pin 44. But there is still no picture. But tv isn't going to standby, it's working, but no picture, filament no glowing.
  13. P

    TV LG RZ 29FB51RX no picture.

    It's a sound like a starting TV . TV won't start if pin 44 has 0,45V ?
  14. P

    TV LG RZ 29FB51RX no picture.

    OK, I connect like in schematic. TV now is starting on, hearing coil. But there is still no picture. Even the filament is not glowing. Maybe it's something with Horizontal/Vertical positioning?
  15. P

    TV LG RZ 29FB51RX no picture.

    OK, if I understood, I should connect through resistor r40 the output of IC to ground? Cheers
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