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how zener diode behaves if it is not working?

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haroon_tech

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hi,
i am designed programmer ckt on bread board...in that ckt i placed zener diode ..so previously its working but after now its not.... i think zener might have gone(short ckted)...

i want to know that if zener diode gone(short ckt) how it behaves in ckt?.............................
 

ckshivaram

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check the forward and backward resistance using multimeter.. if both are same then the diode is bad... But this should be checked by removing the diode from the circuit usually,....
 
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