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Dead Compact Fluorescent Examination

Discussion in 'Electronic Design' started by D from BC, Apr 16, 2007.

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  1. D from BC

    D from BC Guest

    My compact fluorescent died... :(
    I was just about to toss it in the garbage when....
    Crack it open came to mind... Yeah!! Arrrrfff..Arrrrffff. :)
    Only took 1 minute with screwdriver prying.

    There's lots of soot inside.
    The soot source is from one part.
    It was box shaped approx. 8mmx8mmx4mm (LxHxW)
    Capacitor?

    What was that part?
    Or forget that...what's a better compact fluorescent to buy?
    It was a Philips Marathon made in Mexico. 350mA, 25W.
    I think the tube won the marathon... :p

    FYI on other parts
    2 33uF electrolytics
    2 1N50A marked semiconductors
    1 resistor
    2 "orange drop" like capacitors
    1 E core inductor (looks gapped)

    Also..
    When this bulb was new and working...
    I heard a "crack" sound from the wall switch.
    That can't be good...It sounds like a high start up current that's
    damaging the switch contacts.

    Is this just a crappy compact fluorescent?
    D from BC
     
  2. check out wotshisname... sam repair faq ?, might have some info, all
    is aasscciii schematics as well


    martin
     
  3. This might have some info for you:
    http://sound.westhost.com/articles/incandescent.htm

    Dave.
     
  4. D from BC

    D from BC Guest

    Cool thanks..I clipped this off that link:

    "Inrush Current: As noted above (and below), most CFL electronic
    ballasts have a rather high initial inrush current, which can easily
    exceed 5A and often a lot more. This current is limited in some
    electronics by one component - the main filter capacitor. "

    D from BC
     
  5. Guest

    Those CF lamps are highly overrated. They last a long time if you
    leave them on, but switching on/off leads to a premature death. I
    really can't wait until LEDs replace them.
     
  6. Phil Allison

    Phil Allison Guest

    "D from BC"


    ** What was significant about this to you ??

    BTW, that page has lots of my pics and test results.




    ......... Phil
     
  7. D from BC

    D from BC Guest

    I believe the high surge current explains why I can hear arcing from
    the wall switch when I turn on the screwbase Philips Marathon CFL. I
    have to wonder how hurtful that is to the wall switch..
    It's just unnerving to hear (fingernails on a black board effect) and
    it makes me wonder about stresses in the CFL circuit and question it's
    reliability.
    I mentioned the switch arcing noise in case it might be linked to the
    CFL failure..Noise>high current>component Isurge heat damage.

    It looks like a small (nonelectrolytic) box cap burned in the Philips
    CFL.. There's lots of soot..
    I'm just pissed that the electronics apparently failed before the
    tube.
    Anyways..it's in the trash. Some archaeologists 10 000 years from now
    can dig it up and figure it out.
    Thought I'd post about it in case somebody knew tales of crappy CFL's.
    D from BC
     
  8. D from BC

    D from BC Guest

    Ahhhh....
    I don't recall seeing that warning on the package. Bastards!!! :(
    "Warning: Turning off the Philips Marathon CFL can result in premature
    failure.." :p

    The CFL was my kitchen light.. It got turned on and off daily.
    I've replaced it with a screwbase 60W halogen.
    That should last a long time..

    D from BC
     
  9. Phil Allison

    Phil Allison Guest

    "D from BC"
    "Phil Allison"

    ** One CFL is not gonna harm it.

    A dozen would though.



    ** I have measured CFL inrush peaks of +/- 20 amps on 240 volt power.


    ** The peak is brief - a few milliseconds duration.


    ** Polyester caps can release an amazing amount of smoke.


    ** Very common.

    The parts are all stressed over their makers ratings and operated at high
    temps.

    The Chinese makers only care it lasts a couple of thousand hours - as no one
    times the life span and very few come back to the shops that sell them.


    ** Check out these links:

    http://www.execulink.com/~impact/fluorescent_lights.htm

    http://www.execulink.com/~impact/commercial_electric_cfl_EDXO23.htm

    http://www.cpsc.gov/cpscpub/prerel/prhtml05/05064.html

    http://www.execulink.com/~impact/GlobeElectric23WattCFLs.htm




    ......... Phil
     
  10. D from BC

    D from BC Guest

    Thanks for the links.. Interesting reading..
    D from BC
     
  11. These bulbs do not like intermittent mains.
    Check your mains wriring for bad connections.
     
  12. Eeyore

    Eeyore Guest

    You only had one ?

    You realised you're not supposed to toss it in the garbage ?

    Graham
     
  13. Eeyore

    Eeyore Guest

    Utter nonsense. Normal switching on and off doesn't bother them at all.

    Graham
     
  14. Eeyore

    Eeyore Guest

    Which wouldn't bother it at all.

    Really ? Some halogens I tried had very short lifetimes.

    Graham
     
  15. Phil Allison

    Phil Allison Guest

    "Eeysore Fuckwit TROLL "

    ** Err - right

    - so onboard some NOS, Soviet Cold War era space vehicle

    headed for the sun is the fuckwit GREENIE way - OK ??




    ....... Phil
     
  16. Eeyore

    Eeyore Guest

    Do tell how a closed switch 'arcs' will you ?

    Graham
     
  17. Eeyore

    Eeyore Guest

    I've used CFLs for well over 10 years. Most have been Philips and some are
    Osram. I've found them to be quite excellent.

    Graham
     
  18. Eeyore

    Eeyore Guest

    Data please ?

    Not that high.

    His Philips bulb wasn't made in China.

    Graham
     
  19. Phil Allison

    Phil Allison Guest

    "Eeysore = Fuckwit Pommy Cunthead "


    ** Q lacks context.


    ** Worthless, opinionated remark .

    What else - from a brain dead, pommy, autistic freak.



    ** The moon has no oxygen ...

    Go choke to death - you vile pile of narcissistic,

    ASD fucked pommy excrement. !!!

    Same goes for your wife, kids family etc.

    Graham Stevenson is PURE EVIL





    ........ Phil
     
  20. Eeyore

    Eeyore Guest

    I'm simply pointing out a fact. It's entirely possible I think it's daft too.

    Graham
     
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