Removing The Covers - Keysight Technologies N5231A Service Manual

Repair and Replacement Procedures

Removing the Covers

Removing the Covers
Tools Required
— T-10 TORX driver (torque to 9 in-lb or 1.02 N.m)
— T-20 TORX driver (torque to 21 in-lb or 2.38 N.m)
— ESD grounding wrist strap
Removing the Outer Cover
This procedure is best performed with the analyzer resting on its front
handles in the vertical position, as shown in
place the analyzer on its front panel without the handles.
front panel assemblies.
Refer to
1. Disconnect the power cord.
2. With a T-20 TORX driver, remove the strap handles (item
3. With a T-20 TORX driver, remove the four rear panel feet (item
4. Remove the foot locks (secured in the bottom feet), then slide the four
5. Slide the outer cover toward the rear of the analyzer and remove it.
Removing the Inner Cover
Refer to
1. With a T-10 TORX driver, remove the eighteen 8mm pan head screws, and
2. Lift off the cover.
Replacement Procedure
1. On the top side of the PNA, carefully position the gray flex cables so they
2. On the bottom side of the PNA, carefully fold or push down the ribbon
3. Reverse the order of the removal procedures above.
7-8
Figure 7-1 for this procedure.

the screws (item ) on both ends until the handle is free of the analyzer.
removing the center screws with a T-20 TORX driver.

bottom feet (item ) off the cover.
Figure 7-1 for this procedure.
the nine 6mm flat head screws (item
can't be pinched between the covers and the rails.
cables and wires so they can't be pinched between the hardware and the
outer cover. Ribbon cables and wires must never be positioned on top of
hardware.
Figure 7-1 on page
This will damage the

).
Keysight N5231A/32A/39A Service Guide
7-9.
Do not

) by loosening

) by