Removing And Replacing The A29-A32 Test Port Couplers - Agilent Technologies N5242A Service Manual

Repair and Replacement Procedures
Removing and Replacing the A29–A32 Test Port Couplers
Removing and Replacing the A29–A32 Test Port Couplers
Tools Required
• T-10 TORX driver (set to 9 in-lb)
• T-20 TORX driver (set to 21 in-lb)
• 5/16 inch open-end torque wrench (set to 10 in-lb)
• 1 inch open-end torque wrench (set to 72 in-lb)
• ESD grounding wrist strap
Removal Procedure
Refer to Figure 7-18
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
Assembly" on page
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. Disconnect the wire harness (item
and place it out of the way.
7. Remove the coupler nut (item
8. Move the disconnected semirigid cables out of the way and remove the coupler(s) from
the analyzer. On 4-port models, separate the coupler pair.
Replacement Procedure
1. Reverse the order of the removal procedure.
Adhere a new gap pad (4-port) or coupler bumper (2-port) (item
the same location as on the old one. Replace the vibration mount (item
Refer to "Bottom Hardware and Miscellaneous Parts, All Options Except 029" on page
6-72 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
7-38
for this procedure.
7-8.
②
) from the corresponding front panel LED board
③
) from each coupler to be removed.
Table 7-2 on page
PNA Series Microwave Network Analyzers
"Removing and Replacing the Front Panel
①
) from each coupler to be removed.
7-64.
N5242A
④
) to the new coupler in
⑤
) if necessary.
Service Guide N5242-90001