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Repair and Replacement Procedures
Removing and Replacing the A71–A74 Bias Tee Combiners
Removing and Replacing the A71–A74 Bias Tee Combiners
Tools Required
— T-6 TORX driver - set to 6 in-lbs (0.68 N.m)
— 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)
— 5/16-inch open-end wrench (to stabilize the bias tee combiner when
— ESD grounding wrist strap
Removal Procedure
Refer to
page
procedure.
Be careful not to damage the center pins of the semirigid cables. Some
flexing of the cables is necessary to remove assemblies but do not
over-bend them.
1. Disconnect the power cord.
2. Remove the outer cover. Refer to
3. Position the analyzer bottom side up.
4. Disconnect the two semirigid cables (item
5. Remove two screws from the bias tee combiner and bracket-to-chassis
6. Make note of the orientation of the two cable wires and ground cable
7. Remove two screws that attach the bias tee combiner to the bracket (Now
7-80
torquing cables)
Figure 7-38 on page
7-83,
Figure 7-41 on page
combiner to be removed. Refer to
assembly to be removed (Do item
page
7-82.
Do not remove the bias combiner from the bracket yet (item
step 7).
clamp for reinstallation later.
— Remove the DC bias cable (item
to
Figure 7-38 on page
— Remove the screw, cable ground clamp, and RF cable (item
the Bias Combiner. Refer to
Figure 7-41 on page
do item
). Refer to
Figure 7-39 on page
7-82,
Figure 7-39 on page
7-83, and
Figure 7-42 on page 7-84
"Removing the Covers" on page
and
Figure 7-38 on page
only). Refer to
) from the Bias Combiner. Refer
7-82. See also
Figure 7-40 on page
Figure 7-38 on page
7-83.
7-82.
Keysight N5244B/45B Service Guide
7-82,
Figure 7-40 on
for this
7-8.
) from the bias tee
7-82.
Figure 7-39 on
is done in
7-83.
) from
7-82. See also
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Troubleshooting
