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Thread: Need electronics pro advice on this one...

  1. #1
    Low Bitrate lbergamo's Avatar
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    Question Need electronics pro advice on this one...

    Hello,

    I am looking to extend the HD and Power LED from this PCB. It is another wonderfull Dell proprietary specialties.

    What I am looking to do is detach the LEDs from the PCB and then attach them back again with thin guage wire.

    I have attached 3 pictures to this thread. One is the front of the PCB, the back of the PCB and then the two overlayed on one another.

    I thought of attempting to splice the into the ribbon but then I began to wonder wich wire was wich. I tried to trace the leads on the PCB but then I went cross-eyed LOL.

    I am no electronics pro but I do kow how to weild a soldering iron and use way too much wire tape. Any help would be appreciated!

    Thank You

    Leo
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  2. #2
    FLAC
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    You can always just use a soldering iron to loosen the solder right under the light, pull the light out and solder two wires in its place, without hacking up the ribbon.

    If you don't want to do that and can't trace the wires with your eyes, you can use a continuity checker to see which wire is which by trial and error. Using your eyes, you should be able to narrow it down quickly.

    Also, look at the motherboard where the ribbon normally connects. See if there are labels on it there. Most have labels indicating which pin is which.
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  3. #3
    Vendor - Qube colin's Avatar
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    Just for the record, pin 1 is the red one. Pin 1 is also marked on that PCB. Im in a rush so I wont type a novel, but there's your starting point. Should be REALLY self-explanatory after that.

  4. #4
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    Bugbyte's Avatar
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    +1 for the continuity check using a multimeter. Cheap insurance. It's saved me from frying stuff numerous times.
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  5. #5
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    if i am not mistaken wires on the ribbon cable... 1 and 3 hdd led, 2 and 4 power led

  6. #6
    Low Bitrate lbergamo's Avatar
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    Could someone elaborate as to how the pins under the connector associate to the wire on the ribbon. Does each wire on the ribbon have it's own pin on the connector or is it fastened in a diffrent manner ?

    This is the very reason I do not like proprietary setups when it comes to PCs. If I recall from my days when I built PCs as a hobby their used to be individual pins on the mobo that were labled simply like "PWR" and "HDD LED".

  7. #7
    Maximum Bitrate Crinos's Avatar
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    Quote Originally Posted by DEV8ED View Post
    if i am not mistaken wires on the ribbon cable... 1 and 3 hdd led, 2 and 4 power led
    That would be correct

  8. #8
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    the wire with the pink trace is wire 1.. than 2 and so on... attached a pic of them labled on the board
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  9. #9
    Low Bitrate lbergamo's Avatar
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    First of all, thanks to everyone for the help!

    DEV8ED if I am understanding you right, using the picture above, the sequence of the wires on this ribbon is 16 to 1 (striped red). So standards do hold true and the red stripe means wire #1 on all ribbon cables and not just for hard drives etc. As for the pins the are mapped out in a right to left/down up fashion.

    Thank You

    Leo

  10. #10
    Low Bitrate lbergamo's Avatar
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    The overlayed picture I created above was a spur of the moment idea. I was just wondering if it helped any ?

    Thank You

    Leo

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