Hi, I have a 4461 card, but on of the inputs stoped working. It is very obivius that it is a component at the input that is burned. The component is a SOT223 wich says "DN5SW" on top. It is placed next to the connector to the BNC board. I want to replace this components my self! Does any one know what this component is/do, and who makes it? there seems to be 4 of them per channel.
I would advise you to contact your nearest NI office/Application engineers and request support or do a request support online, instead of attempting to repair the hardware by yourself.
