FAQ: What does it mean when the display on my 6680 series power supply reads “Secondary DN”?

A secondary down error means that the unit is broken and must be serviced.

Contact Keysight Technologies at: https://service.keysight.com/infoline/public/product-service-query.aspx?PRODUCT_NO

Applies to: 6641A, 6642A, 6643A, 6644A, 6645A

Applies to: 6651A, 6652A, 6653A, 6654A, 6655A

Applies to: 6671A, 6672A, 6673A, 6674A, 6675A

Applies to: 6680A, 6681A, 6682A, 6683A, 6684A

Applies to: 6690A, 6691A, 6692A

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