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Hot!Is there an ICD4 schematic available?

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mpgmike
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2020/11/20 07:29:09 (permalink)
4 (1)

Is there an ICD4 schematic available?

I screwed up & let some smoke out.  I pulled my ICD4 apart and found physical damage to a component labeled FB3, which looks like a capacitor.  Before I spend $250 for a replacement, I'd like to see if replacing that one part fixes mine.  Help appreciated.

I don't need the world to know my name, but I want to live a life so all my great-grandchildren proudly remember me.
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    mbrowning
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    Re: Is there an ICD4 schematic available? 2020/11/20 07:43:00 (permalink)
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    du00000001
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    Re: Is there an ICD4 schematic available? 2020/11/20 07:47:49 (permalink)
    0
    You better post a photo of the component in doubt.
    Capacitors usually come unmarked and have a low number of colors, so I doubt it's a cap.

    PEBKAC / EBKAC / POBCAK / PICNIC (eventually see en.wikipedia.org)
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    mpgmike
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    Re: Is there an ICD4 schematic available? 2020/11/20 07:50:49 (permalink)
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    Thanks.  I knew they handled warranty replacements, but never thought to just ask such a question.  Query submitted.

    I don't need the world to know my name, but I want to live a life so all my great-grandchildren proudly remember me.
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    mpgmike
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    Re: Is there an ICD4 schematic available? 2020/11/20 08:15:17 (permalink)
    5 (1)
    Here is a picture:

     
    Or maybe not.  Now that I think about it, I don't remember ever uploading a picture to this site...

    I don't need the world to know my name, but I want to live a life so all my great-grandchildren proudly remember me.
    #5
    du00000001
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    Re: Is there an ICD4 schematic available? 2020/11/20 08:37:55 (permalink)
    0
    Uploading to this site DOES work (for alimited number of extensions).
    Anyway - sharing via g..gl. did work.
     
    But I cannot zoom in enough. Would you please provide a close(r)-up of the component?
     
    A very first diagnosis - provided the arrow is meant to point to the black component with the white bar: looks like some diode. You'd better start checking for overvoltages in your target system right now.

    PEBKAC / EBKAC / POBCAK / PICNIC (eventually see en.wikipedia.org)
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    mpgmike
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    Re: Is there an ICD4 schematic available? 2020/11/20 09:27:30 (permalink)
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    I know what I did wrong, it was entirely my fault.  I was just hoping I could fix it on the cheap (after all, I work with electronics).  FB3 has no markings, like a capacitor.  That's about as good as I can get with my camera.

    I don't need the world to know my name, but I want to live a life so all my great-grandchildren proudly remember me.
    #7
    du00000001
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    Re: Is there an ICD4 schematic available? 2020/11/20 09:34:00 (permalink)
    0
    "FB3" is on the silkscreen?

    PEBKAC / EBKAC / POBCAK / PICNIC (eventually see en.wikipedia.org)
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    du00000001
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    Re: Is there an ICD4 schematic available? 2020/11/20 09:40:34 (permalink)
    5 (1)
    If you applied some overvoltage, the fancy black devide with the white bar might be short or open.
    If short, I'd expect it to be a transzorb/zener diode. If open, a simple diode. (Caps rarely blow in a decently designed circuit.)

    PEBKAC / EBKAC / POBCAK / PICNIC (eventually see en.wikipedia.org)
    #9
    crosland
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    Re: Is there an ICD4 schematic available? 2020/11/20 09:45:23 (permalink)
    4 (3)
    More likely a ferrite bead if they use sensible reference designators. AT a pinch you could probably replace with a wire link but noise immunuty may suffer somewhere.
     
    Otherwise, raise a ticket and say its broken. Chances are you will get a new one.
    #10
    mpgmike
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    Re: Is there an ICD4 schematic available? 2020/11/20 10:15:00 (permalink)
    0
    FB3 is silk screened.
     
    It reads 135 ohms (it's in parallel with C121 cap).
     
    Already raised a ticket, but admitting fault.  I requested a part number/value for FB3.  Worst case, I'll buy a new one. I wouldn't expect Microchip to pay for my stupidity.

    I don't need the world to know my name, but I want to live a life so all my great-grandchildren proudly remember me.
    #11
    NKurzman
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    Re: Is there an ICD4 schematic available? 2020/11/20 10:19:03 (permalink)
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    They will most likely replace it so I wouldn’t start repairing it until you’re sure they won’t.
    Unfortunately they will not charge you so he will have to live with the guilt.

    I agree an FB designator sounds like ferrite bead.
    #12
    du00000001
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    Re: Is there an ICD4 schematic available? 2020/11/20 10:24:59 (permalink)
    4.5 (2)
    Ferrite bead not open? Hardly the component that let the magic smoke out.
    And if the cap is not shorted, the fault is to be found somewhere else.
     
    BTW: what was the fault calling the desaster?

    PEBKAC / EBKAC / POBCAK / PICNIC (eventually see en.wikipedia.org)
    #13
    NKurzman
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    Re: Is there an ICD4 schematic available? 2020/11/20 10:40:33 (permalink)
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    I think you’re right 135 ohms might be normal for a ferite bead. Even if it was discolored by heating.
    #14
    MHS
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    Re: Is there an ICD4 schematic available? 2020/11/20 12:35:07 (permalink)
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    NKurzman
    Unfortunately they will not charge you so he will have to live with the guilt.



    mr green
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    mpgmike
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    Re: Is there an ICD4 schematic available? 2020/11/20 13:22:00 (permalink)
    0
    I was working on a board with 2 different levels of ground.  During initialization both grounds are at the same potential.  Then they part ways.  I'm using 3 PICs; 2 at power supply ground, and a third on the floating ground.  I was connected to this 3rd PIC for debugging, and when the grounds parted ways, -------- POOF!  I assumed my laptop had a floating ground (battery powered, even though I had it plugged into the charger).  I assumed the power supply has an isolated ground from earth ground (will have to check that one).  And I assumed the ICD4 would buffer any discrepancies.  You know what they say about when you assume; you make an ASS out of U & ME. (ASS-U-ME).

    I don't need the world to know my name, but I want to live a life so all my great-grandchildren proudly remember me.
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    du00000001
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    Re: Is there an ICD4 schematic available? 2020/11/20 13:37:20 (permalink)
    2 (1)
    Oops.
    Motor drive, digital power supply or ???
    So either some protection device(s) or some input(s) and/or output(s) might be blown
     
    That's where one of the rare "USB isolators" comes really handy.
     
    Haven't yet had to debug an isolated PIC, but you can bet your ass that I won't go without debug line isolation - protecting me as well as my assets.

    PEBKAC / EBKAC / POBCAK / PICNIC (eventually see en.wikipedia.org)
    #17
    mpgmike
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    Re: Is there an ICD4 schematic available? 2020/11/20 13:42:48 (permalink)
    4 (1)
    Oh, yea.  I had a USB Hub/isolator in place that fried as well.  At least my laptop USB port still works.

    I don't need the world to know my name, but I want to live a life so all my great-grandchildren proudly remember me.
    #18
    du00000001
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    Re: Is there an ICD4 schematic available? 2020/11/20 14:02:35 (permalink)
    0
    Hub or really an isolator?
    I wouldn't expect a real (electrical) isolator to fry. While a hub ...

    PEBKAC / EBKAC / POBCAK / PICNIC (eventually see en.wikipedia.org)
    #19
    Antipodean
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    Re: Is there an ICD4 schematic available? 2020/11/20 17:23:31 (permalink)
    5 (1)
    mpgmike
     You know what they say about when you assume; you make an ASS out of U & ME. (ASS-U-ME).


    No, it is worse than that. Where is the U? It is in front of ME, so you make an ASS out of U in front of ME ... LoL: LoLLoL: LoL

    Do not use my alias in your message body when replying, your message will disappear ...

    Alan
    #20
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