7-50 Keysight N5227B Service Guide
Repair and Replacement Procedures
Removing and Replacing the A42–A45 Bias Tees
7-
Removing and Replacing the A42–A45 Bias Tees
Tools Required
— T-10 TORX driver (torque to 9 in-lb or 1.02 N.m)
— T-20 TORX driver (torque to 21 in-lb or 2.38 N.m)
— 5/16 inch open-end torque wrench (torque to 10 in-lb or 1.13 N.m)
— 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 7-6
3.
Position the analyzer bottom side up.
4.
The bias tees and the blocks to which they are attached, must be removed
as a complete assembly.
Disconnect four semirigid cables (item
①
) from the bias tee block to be
removed.
5.
Disconnect the wire harness cable (item
➁
) from the bias tee.
6.
Remove two test set deck screws (item
③
) from the bias tee block to be
removed.
7.
Move the disconnected semirigid cables out of the way and remove the
bias tee block from the analyzer. It may be necessary to loosen the
connector at the other end of some of the semirigid cables to allow them
to be moved enough.
8.
Remove two screws from the bias tee in order to remove it from the bias
tee block.
Replacement Procedure
1.
Reverse the order of the removal procedure.
Orient the position of the bias tees and block as shown in
Torque all cable connections 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.
