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Slide-out CCFLs - lovely

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    #1

    Slide-out CCFLs - lovely

    Here i got a HP 1502. Cracked panel. I proceeded to remove the PSU and hard wire the BL pin to 3.3v to make a CCFL tester out of it. But i wanted to get the lamps out as well.

    As i was preparing for a full panel teardown, i gave the area where the lamp wires entered the panel a closer look. "Um, what happens if i pull on it like this?" Hey presto... slide-out CCFLs complete with metal shields so they don't break. The lamps are in good shape and they're pretty honkin' bright. Just the right thing to light up my workbench methinks.
    Originally posted by PeteS in CA
    Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
    A working TV? How boring!
    Tags: None
    #2
    Re: Slide-out CCFLs - lovely

    Turns out this inverter uses analog backlight control. A pot with the ends connected to 3.3v and ground and the center pin to the backlight control - and i got myself a dimmable workbench lamp. Even if it were PWM it wouldn't have been much harder - but this was stupid easy.
    Originally posted by PeteS in CA
    Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
    A working TV? How boring!

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      #3
      Re: Slide-out CCFLs - lovely

      Originally posted by Th3_uN1Qu3 View Post
      and i got myself a dimmable workbench lamp.
      Nice! That could be quite useful when you take pictures. Good lighting = good pictures.

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        #4
        Re: Slide-out CCFLs - lovely

        slide out ccfs are fairly common on desktop monitors. don't expect any on laptop screens, believe me, i've tried, they're stuck with this aluminum tape and soo easy to break and every screen model is different.
        Cap Datasheet Depot: http://www.paullinebarger.net/DS/
        ^If you have datasheets not listed PM me

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          #5
          Re: Slide-out CCFLs - lovely

          Exactly, Uranium-235. Not common feature like this. I would have to disassemble completely to get backlight repaired.

          Cheers, Wizard

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            #6
            Re: Slide-out CCFLs - lovely

            You'll never guess what I found recently.... A 15" or so desktop LCD that uses a laptop LCD panel. The panel is made by "Quantas". I was wondering why the screen was so light when I got it from the trash. The screen is made by "Nova".

            The PCB is made my "EMAX". Nice design but awful caps. A mix of Hermei and Fuhjjyu caps. The logic board has all Evercon caps and oddly enough, the logic chip has printed on it "Novatek". I wonder if this is a coincidence?
            "We have offered them (the Arabs) a sensible way for so many years. But no, they wanted to fight. Fine! We gave them technology, the latest, the kind even Vietnam didn't have. They had double superiority in tanks and aircraft, triple in artillery, and in air defense and anti-tank weapons they had absolute supremacy. And what? Once again they were beaten. Once again they scrammed [sic]. Once again they screamed for us to come save them. Sadat woke me up in the middle of the night twice over the phone, 'Save me!' He demanded to send Soviet troops, and immediately! No! We are not going to fight for them."

            -Leonid Brezhnev (On the Yom Kippur War)

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