Chapter 3 Maintenance
NI PXI-1056 User Manual 3-4 ni.com
Removal
The PXI-1056 power-supply shuttle is a replacement part for the PXI-1056
chassis. Before attempting to replace the power-supply shuttle, verify that
there is adequate clearance behind the chassis. Set the power switch on the
front panel to the Off position. Disconnect the power cable and any other
cables from the power-supply shuttle on the rear of the chassis. Identify the
4 screws that attach the power-supply shuttle back cover to the chassis.
Refer to Figure 1-2, Rear View of the PXI-1056 Chassis, for the screw
locations. Using a number 1 Phillips screwdriver, remove the screws. Pull
on the two rear handles of the power-supply shuttle cover to remove it.
Unscrew the two thumbscrews on the bottom of the power supply shuttle
and remove the shuttle from the rear of the chassis.
Note The 4 power supply shuttle screws (4-40 × 1/4 in.) are not explicitly identified in
Figure 1-2, Rear View of the PXI-1056 Chassis, but it can be used as a visual reference.
There are four screws evenly spaced along the left and right edges.
Installation
Ensure that there is no visible damage to the new power-supply shuttle.
Verify that the housing and connector on the new power-supply shuttle
have no foreign material inside. Install the new power-supply shuttle into
the opening on the rear of the chassis. Tighten the two thumbscrews with a
flat-head screwdriver using 5 in. lbs of torque, install the back cover, and
tighten the 4 screws with a Phillips screwdriver (maximum torque
of5 in. lbs).
Configuration
The fan-speed selector switch is on the rear panel of the power-supply
shuttle. Refer to Figure 1-2, Rear View of the PXI-1056 Chassis, to locate
the fan-speed selector. Select HIGH for maximum cooling performance
(recommended) or AUTO for quieter operation. When set to AUTO,
air-intake temperature determines the fan speed.
Connecting Safety Ground
Refer to the Connecting Safety Ground section of Chapter 2, Installation
and Configuration.
Connecting to Power Source
Refer to the Connecting to Power Source section of Chapter2, Installation
and Configuration.