National Instruments USB-621 Series User Manual page 36

Chapter 3 Connector and LED Information
Unscrewing and reinstalling the thread-forming screws over time will produce a
Note
compromised connection between the device top and bottom.
NI USB-621x User Manual
3. Replace the broken fuse in the socket. Figure 3-2 shows the fuse
location.
0.75A,125V Fuse, Socketed
1
Figure 3-2. USB-621x Mass Termination Fuse Location
4. Replace the device top and reattach with the screws.
3-5
1
ni.com