Keysight Technologies N5247B, Service Manual

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7-70 Keysight N5247B Service Guide
Repair and Replacement Procedures
Removing and Replacing the A64 Tuner (Option 029)
7-
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 Figure 7-33 for this procedure.
1. Disconnect the power cord.
2. Remove the outer cover. Refer to “Removing the Covers” on page 7-6 .
3. Position the analyzer bottom side up.
4. Disconnect two semirigid cables (item

) from the A64 tuner.
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.
5. Disconnect the A64 tuner wire harness cable (item

) from the A59 noise
receiver (downconverter). Make note of the routing of this wire harness so
that it can be rerouted later in the same manner.
6. Remove two screws (item

) that secure the A64 tuner to its bracket.
7. Move the disconnected semirigid cables out of the way and remove the
tuner 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.
Replacement Procedure
1. Reverse the order of the removal procedure reusing the existing hardware.
Torque all cable connectors to 10 in-lbs.
2. Perform the post-repair adjustments, verifications, and performance tests
that pertain to this removal procedure. Refer to Table 7-2 on page 7-92 .
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.