7-32 Keysight N5264A Service Guide
Repair and Replacement Procedures
Removing and Replacing the A21 HMA26.5
7-
Removing and Replacing the A21 HMA26.5
Tools Required
— 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
for this procedure.
1.
Disconnect the power cord.
2.
Remove the outer cover. Refer to
“Removing the Covers” on page 7-5
3.
Position the measurement receiver bottom side up.
4.
Disconnect the ribbon cable (item
①
) from the A21 HMA26.5 assembly.
5.
Disconnect cable W41 from the A21 HMA26.5.
6.
Disconnect cable W47 at the A21 HMA26.5.
7.
Remove two screws (item
➁
) from the A21 HMA26.5 mounting bracket.
8.
Remove the mounting bracket, with the A21 HMA26.5 attached, from the
measurement receiver.
9.
Remove four screws (item
③
) that attach the A21 HMA26.5 to the
mounting bracket.
Replacement Procedure
1.
Reverse the order of the removal procedure.
Torque all RF cable connectors to 10 in-lbs.
2.
Perform the post-repair adjustments, verifications, and performance tests
that pertain to this 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.