Dim-Bulb tester

[rtstorm]

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?

[tom66]

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.