Keysight Technologies N5244/5B Service Manual page 611

Repair and Replacement Procedures
Removing and Replacing the A64 Tuner (Option 029)
Removing and Replacing the A64 Tuner (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 A64 tuner, the A56 port 1 noise bypass switch, and the bracket to
5. Disconnect two semirigid cables from the A64 tuner.
6. Disconnect the A64 tuner wire harness cable (item
7. Disconnect four semirigid cables from the A56 port 1 noise bypass switch.
8. Disconnect the A56 bypass switch wire harness cable (item
9. Remove two screws (item
10. Move the disconnected semirigid cables out of the way and remove the
Keysight N5244B/45B Service Guide
Figure 7-32 for this procedure.
which they are attached, will be removed as a complete assembly.
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.
set motherboard. Make note of the routing of this wire harness so that it
can be rerouted later in the same manner.
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.
A59 noise receiver (downconverter). Make note of the routing of this wire
harness so that it can be rerouted later in the same manner.
tuner/A56 bypass switch assembly to the chassis.
A64 tuner/A56 bypass switch assembly (with bracket) from the analyzer. It
may be necessary to loosen the other end of the cables to allow them to
be moved. Do not overbend them.
"Removing the Covers" on page

) that secure the bracket of the A64
7-8.
①
) from the A23 test

) from the
7-71