Is this a schottky diode or a zener or a???

Discussion in 'General Electronics Chat' started by hipresr, Mar 23, 2009.

  1. hipresr

    Thread Starter New Member

    Mar 23, 2009
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    And it also has ohm striped like a resistor. Yes very much a newbie but trying to rebuild these two boards and finding these guys are a pita. I know they are categorized as surface mount and a value of 79(violet/white) When i test them i know they are shot since some return a value of .7 or .9 and some are 7.1 and 1 is 4.4. Here is the picture. Any help appreciated :)

    [​IMG]
     
  2. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
    6,357
    718
    Inductors? What is the function of the circuit?

    Also, Can you crop out the non-circuit board parts to zoom in a bit? It goes across two displays..

    I'm seeing the colors as:

    Brown - Grey - Violet, Black, Gold - Is that correct?

    Options:
    187Ω 10% Resistor
    1N1870 Not valid as no metallic colors silver/gold are in Diode codes.
    87μH Inductor using reversed - grey violet black gold

    What do they measure for resistance out of circuit?
     
    Last edited: Mar 23, 2009
  3. hipresr

    Thread Starter New Member

    Mar 23, 2009
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    There are only two stripes(white then violet) and then all brown so i am not sure if they are 97ohm or 970 ohm. I did more searching last night and they call these clamping diodes since the circuit ends at solenoids to prevent voltage spike back. Unfortunately i have no idea where to find these high current load diodes that have resistor markings. One place sent me to semikron but did not find anything there. :(
     
  4. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
    6,357
    718
    In the third photo from the left, the flash is bouncing off what appears to be a black stripe.

    1N97 or 1N970 w/black stripe

    What voltage do these run at, and what inductors/coils are they across? A suitable substitute is likely available.
     
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