Chapter 3
Maintenance
NI PXI-1010 Chassis User Manual
3-4
ni.com
SCXI Subsystem Fuse Replacement
Power Entry Module Fuse Replacement
Caution
Disconnect all power before removing cover.
Refer to Figure 1-3,
Rear View of the PXI-1010 Chassis
, as you complete
the following steps to replace the power-entry module fuse:
1.
Power off the chassis.
2.
Remove the power cable from the power-entry module.
3.
Using a flathead screwdriver, pry the door to the voltage selection
wheel open from the top.
4.
Pull out the fuse drawer.
5.
Remove the fuse.
6.
Install the new fuse in the drawer.
7.
Reinsert the fuse drawer in the right side slot with the arrow pointing
to the right.
8.
Close the door.
9.
Reinsert the power cable.
SCXI Subsystem Backplane Fuse Replacement and Check
In addition to the power entry module fuse, the analog supply lines on the
backplane are fused at 1.5 A. The fuse manufacturer is Littelfuse, part
number 251 01.5.
If you are going to make your own modules, fuse your module at 250 mA
to avoid blowing the backplane fuses. Fusing your module also better
protects your module because a failure can result in a large amount of
current drawn, but not enough to blow the backplane fuses.
The backplane fuses are located behind the SCXI subsystem fan.
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