help identifying a diode

[Onilll]

Hi, dead diode blue-red:

**broken link removed**

**broken link removed**

no letters or numbers on it.

 

[ckshivaram]

Appears like a SMD zener diode....

 

[betwixt]

I would look for the data sheet for the IC and see what the application notes say. It looks to be an SMPS controller so the components around it will be fairly standard.

Brian.

 

[KJ6EAD]

https://www.onsemi.com/pub_link/Collateral/UC3844-D.PDF

 

[Onilll]

https://www.onsemi.com/pub_link/Collateral/UC3844-D.PDF

Thank you. On all figures in datasheet 1N4937. I check them, CMD only SOD-123 case. On board SOD-80 case or similar, so its not 1N4937.