how to physically read smt ic codes properly ?

Discussion in 'General Electronics Chat' started by reapairman, Mar 27, 2013.

  1. reapairman

    Thread Starter New Member

    Dec 27, 2011
    17
    1
    do you use a microscope ?

    i've been using a loupe with little success as they have a thin layer of green epoxy over them and even 1500 wet and dry doesn't seem to help much.

    is there a way to tell from an incomplete part of the ic code. i've made out 3 1/2 of the 7 ic's so far.

    2 IR2106's, 1 phillips 14 pin HEF40106BT another phillips 14 pin that is so hard to read I can only make out REF4883 but the R and 3 might not be correct.

    then another 3 still undiscovered. making it tricky to decipher the circuit.

    the offending circuit

    [​IMG]

    another image of some of the ic's

    [​IMG]
     
  2. toffee_pie

    Active Member

    Oct 31, 2009
    162
    7
    get a eye glass and use meths on the ic to clean it and have a good peep, you should be able to make out the name under light.
     
  3. #12

    Expert

    Nov 30, 2010
    16,298
    6,811
    What is, "meths"? Methyl alcohol? Methyl ethyl ketone? Methamphetamine?
     
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  4. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    7,392
    1,605
    I can't get meth anymore since the police raided the local lab.
     
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  5. reapairman

    Thread Starter New Member

    Dec 27, 2011
    17
    1
    ah, take some meths first I get it now
     
  6. richard.cs

    Member

    Mar 3, 2012
    162
    31
    I imagine Toffe_Pie is from the UK where "meths" is short for "methylated spirit" aka denatured alcohol.
     
  7. toffee_pie

    Active Member

    Oct 31, 2009
    162
    7
    whats it called in the states, lol.

    ye watch too much breaking bad :)
     
  8. #12

    Expert

    Nov 30, 2010
    16,298
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    denatured alcohol = ethyl alcohol with a poison in it.
    the phrase, "methylated spirits" suggests that the poison is methyl alcohol.
     
  9. WBahn

    Moderator

    Mar 31, 2012
    17,750
    4,797
    I've always wondered how you "denature" something by using something else that is just as "natural" as the thing being "denatured" with it. :confused: :D
     
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