Keysight Technologies N5247B, Service Manual

Page: 512 / 566

7-68 Keysight N5247B Service Guide
Repair and Replacement Procedures
Removing and Replacing the A59 noise receiver (downconverter) – (Option 029)
7-
Removing and Replacing the 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 Figure 7-34 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 all cables and wire harnesses from 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.
5. Loosen three screws (item

) that secure the A59 noise receiver
(downconverter) to the chassis.
6. Move the disconnected cables out of the way and remove the A59 noise
receiver (downconverter) 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.
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.