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  1. pharaon

    help in fixing national panasonic stereo model RX - F80 - 2

    thanks lot, i'm sure it will be a great help but still hoping for someone to have time helping me with it
  2. pharaon

    help fixing audio amplifier no sound out

    thanks all i fixed it
  3. pharaon

    help fixing audio amplifier no sound out

    it's USB reader and FM radio as well YT-326A no sound out it have TDA7057AQ IC how can i check if IC TDA7057AQ is malfunction with multimeter?
  4. pharaon

    Try to fix Electric Door bell

    that's what i did i shorted that black line or bypass R1 and the diode and connect the circuit with 20V DC , it worked fine and the sound were acceptable although i'm not sure how higher DC voltage can it up to anyway i'd like to know what was the R1 value that make it work on 220V AC
  5. pharaon

    Try to fix Electric Door bell

    i draw it whole again in different way the faulty resistor is R1
  6. pharaon

    Try to fix Electric Door bell

    what component connection i should recheck?
  7. pharaon

    Try to fix Electric Door bell

    i tried the best i can hope i did it right
  8. pharaon

    Try to fix Electric Door bell

    i'm not sure how can i do that
  9. pharaon

    Try to fix Electric Door bell

    also something strange when i start to cut through that big resistor it was very difficult anyway i saw like very small metal and it gave me 1.6 Kohms but i know it's wrong i tried the measure again the whole resistor and it give me 3 kohms i'm sure it's wrong according to two colors red and...
  10. pharaon

    Try to fix Electric Door bell

    what application can i use to make notice on picture and write the right colors?
  11. pharaon

    Try to fix Electric Door bell

    yes there is and it cause that resistor to smoke what do you mean being in 16 VAC range? it's 230 ACV in
  12. pharaon

    Try to fix Electric Door bell

    but there's smoke come out of that resistor , how will i be able to check AC if goes to the transformer and what could cause that resistor to blow up?
  13. pharaon

    Try to fix Electric Door bell

    i couldn't check any output AC current
  14. pharaon

    Try to fix Electric Door bell

    All what i get were smoke from that resistor
  15. pharaon

    Try to fix Electric Door bell

    what current should be at the speakers leads ? AC or DC since the speaker is connected to the secondary transformer
  16. pharaon

    Try to fix Electric Door bell

    can i check it with blown resistor ?
  17. pharaon

    Try to fix Electric Door bell

    do i need to disconnect it ?
  18. pharaon

    Try to fix Electric Door bell

    shouldn't i first know the resistor value to replace it so i can test that?
  19. pharaon

    Try to fix Electric Door bell

    oh yes the blue are conected to speaker and the two red are to AC 220 V
  20. pharaon

    Try to fix Electric Door bell

    what transducer? that's the whole circuit. it connect directly to 220 AC V
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