Dim-Bulb tester

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  • rtstorm
    Badcaps Veteran
    • Feb 2012
    • 971
    • Croatia
    #1

    Dim-Bulb tester

    Hello,

    i make myself a dim bulb tester (60W lamp) because i am fixing TV power supply that has been blown Mosfet, resistor and rectifier bridge. I replace component and i do not want to damage them again.

    I power it up over tester and lamp light for 1 sec then turn off, my question is it safe to turn on TV?
    ...the quieter you become the more you are able to hear...
    Tags: None
    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK
      #2
      Re: Dim-Bulb tester

      The lamp glowing indicates current is being drawn.
      Once the lamp goes out, very little current is being drawn.

      If there was a short, the lamp would be on continiously. So it should be OK.

      Most power supplies will do one of several things:
      - The lamp may flash or flicker
      - The lamp may glow once then go out once the main capacitor has charged up.
      - The lamp may glow dimly and the TV may operate (usually smaller TVs will run with a 100W bulb, larger ones may not work or may require a much larger bulb, 150-200W or so)

      Now there is one exception, if the TV has a relay on the power board which may turn off, there could be a short beyond this relay. If there is a relay, you want to find some way to keep it on continuously.
      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

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