Zenor Diode tests as a regular Diode Can you help?

[Low Voltage]

I am repairing a circuit board that has a component Labeled as ZD5.
I removed it for testing and it has a Zenor symbol under it.
When I check it with my scope using the Lissajous pattern test it
shows up as a standard diode.
Does anyone have any ideas as to why?

Thanks, Wade.

 

[Audioguru]

When forward biased then a zener diode is an ordinary diode that has a voltage of about 0.7V. It breaks down at its rated voltage when it is reverse biased. Maybe your tester does not have enough voltage to test its zener voltage.

 

[R0und_R0bin]

I am repairing a circuit board that has a component Labeled as ZD5.
I removed it for testing and it has a Zenor symbol under it.
When I check it with my scope using the Lissajous pattern test it
shows up as a standard diode.
Does anyone have any ideas as to why?

Thanks, Wade.

What is the purpose of ZD5 in your circuit? Because under zener symbol (especialy on the board) it can be uni or bi directional or TVS.
Anyway, you'll need a certain amount of current flowing into (forward or backward) to see the breakdown voltage.
So try with more current.

 

[(*steve*)]

Anyway, you'll need a certain amount of current flowing into (forward or backward) to see the breakdown voltage.
So try with more current.

That's nonsense.

Go with Audioguru's answer

 

[R0und_R0bin]

That's nonsense.

Go with Audioguru's answer

Explain you dear moderator. Just saying "that's nonsense" doesn't help anybody.
And I will be very pleased to read your explanation.

 

[davenn]

Explain you dear moderator. Just saying "that's nonsense" doesn't help anybody.
And I will be very pleased to read your explanation.

as Steve said, read Audioguru's response ... it's the voltage, not current