Removing And Replacing The A33-A36 Test Port Couplers - Keysight N5227A Service Manual

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 Figure 7-12 for this procedure.
CAUTION 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.
1. Disconnect the power cord.
2. Remove the front panel assembly. Refer to
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
6. Remove the coupler nut (item
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
location as on the old one. Replace the vibration mount (item
Hardware and Miscellaneous Parts" on page 6-76
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 Table 7-2 on page
7-34
"Removing and Replacing the Front Panel Assembly" on
①
) from each coupler to be removed.
③
) from each coupler to be removed.
for replacement part numbers.
7-54.
PNA Series Microwave Network Analyzers
④
) to the new coupler in the same
⑤
) if necessary. Refer to
Service Guide N5227-90001
N5227A
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