Keysight N5227B Service Guide 7-43
Repair and Replacement Procedures
Removing and Replacing the A33–A36 Test Port Couplers
Removing and Replacing the A33–A36 Test Port Couplers
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)
— 1 inch open-end torque wrench (torque to 72 in-lb or 8.15 N.m)
— ESD grounding wrist strap
Removal Procedure
Refer to
for this procedure.
1.
Disconnect the power cord.
2.
Remove the front panel assembly. Refer to
Front Panel Assembly” on page 7-7
.
3.
Position the analyzer bottom side up.
4.
On 4-port models, it is necessary to remove the couplers in pairs: ports
1/3 and 2/4.
5.
Disconnect two semirigid cables (item
①
) from each coupler to be
removed.
6.
Remove the coupler nut (item
③
) from each coupler to be removed.
7.
Move the disconnected semirigid cables out of the way and remove the
coupler(s) 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.
Replacement Procedure
1.
Reverse the order of the removal procedure.
Adhere a new gap pad (4-port) or coupler bumper (2-port) (item
④
) to the
new coupler in the same location as on the old one. Replace the vibration
mount (item
⑤
Miscellaneous Parts” on page 6-124
for replacement part numbers.
Torque all connectors to 10 in-lbs. Torque coupler nuts to 72 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.