7-40 Keysight N5224A/25A Service Guide
Repair and Replacement Procedures
Removing and Replacing the A33–A36 Test Port Couplers
7-
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 7-8
.
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. It may be necessary to loosen the other end of the cables to
allow them to be moved. Do not overbend them.
6.
Disconnect the wire harness (item
➁
) from the corresponding front panel
LED board and place it out of the way.
7.
Remove the coupler nut (item
③
) from each coupler to be removed.
8.
Move the disconnected semirigid cables out of the way and remove the
coupler(s) from the analyzer. It may be necessary to remove other cables
to remove the coupler(s). If so, make note of the connection locations for
reinstallation later.
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
) if necessary. Refer to
Miscellaneous Parts” on page 6-100
for replacement part numbers.
Torque all connectors to 10 in-lbs. Torque coupler nuts to 72 in-lbs.
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.
