Keysight Technologies N5244/5B Service Manual page 609

Repair and Replacement Procedures
Removing and Replacing the A57 Port 2 Noise Bypass Switch and A59 Noise Receiver
(Downconverter) – (Option 029)
Removing and Replacing the A57 Port 2 Noise Bypass Switch and
A59 Noise Receiver (Downconverter) – (Option 029)
Tools Required
T-6 TORX driver (set to 4 in-lb)
— T-10 TORX driver (set to 9 in-lb)
— T-20 TORX driver (set to 21 in-lb)
— 5/16 inch open-end torque wrench (set to 10 in-lb)
— ESD grounding wrist strap
Removal Procedure
Refer to
Be careful not to damage the center pins of the semirigid cables. Some
flexing of the cables is necessary to remove the assembly. However, do not
over-bend the semirigid cables.
1. Disconnect the power cord.
2. Remove the outer cover. Refer to
3. Position the analyzer bottom side up.
4. The A57 port 2 bypass switch and the A59 noise receiver (downconverter),
5. Disconnect all cables and wire harnesses from the A57 port 2 bypass
6. Loosen four screws (item
7. Move the disconnected cables out of the way and remove the bracket,
8. Remove the assembly to be replaced from the bracket.
Replacement Procedure
1. Reverse the order of the removal procedure reusing the existing hardware.
Keysight N5244B/45B Service Guide
Figure 7-31 for this procedure.
and the bracket to which they are attached, will be removed as a complete
assembly.
switch and the A59 noise receiver (downconverter). Make note of all cable
connections for reconnection later.
It may be necessary to disconnect or remove other cables to gain access.
If you do, make note of these cable connections for reconnection later.
with the A57 and A59 assemblies attached, from the analyzer. It may be
necessary to loosen the other end of the coaxial cables to allow them to be
moved. Do not overbend them.
Torque all cable connectors to 10 in-lbs.
"Removing the Covers" on page

) that secure the bracket to the chassis.
7-8.
7-69