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Need help identifying a defective component on a simple PCB

Discussion in 'Electronic Basics' started by Chuck West, Jul 29, 2003.

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  1. Chuck West

    Chuck West Guest

    The light in the hood over my stove recently burnt out. I replaced it
    with a new bulb and now it won't turn off! I checked the specs on the
    hood and it's rated for a maximum 60 watt bulb. The burnt out bulb
    was 100w and may have damaged the PCB that controls the light. The
    fan and fan controls still work fine.

    I took the thing apart and found a PCB with not too many components on
    it. There are a bunch of transistors, resistors capacitors and four
    IC's. There's also this big rectangular orange thing, about 2" long x
    1/2" wide x 1/2" tall. There seems to be some melted PCB like fluid
    around this component so I thought maybe it's the culprit. Only thing
    is I don't know what it is or what it does so I'm not sure how to test

    If anyone happens to know the name, function or testing-procedure for
    the mysterious orange rectangle, I would greatly appreciate their

    Otherwise, it's US$90 for a new PCB from the manufacturer (and a punch
    in the face to the electrician who installed the hood with the wrong
  2. AC/DCdude17

    AC/DCdude17 Guest

    X-No-Archive: Yes

    I bet the arcing from failing lamp killed the triac. They usually fail in
    shorted position. trace the connection to lamp socket. You should run
    into a three pin device. This is the triac.
  3. Chuck West

    Chuck West Guest

    It's a resistor - duh!
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