Removing And Replacing The A52 And A53 Option 029 Test Port Switches - Agilent Technologies N5242A Service Manual

Repair and Replacement Procedures

Removing and Replacing the A52 and A53 Option 029 Test Port Switches

Removing and Replacing the A52 and A53 Option 029
Test Port Switches
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)
• ESD grounding wrist strap
Removal Procedure
Refer to Figure 7-25
CAUTION Be careful not to damage the center pins of the semirigid cables. Some flexing
of the cables is necessary, but do not over-bend the semirigid cables.
1. Disconnect the power cord.
2. Remove the outer cover. Refer to
3. Remove the front panel assembly. Refer to
Assembly" on page
4. Position the analyzer bottom side up.
5. The test port switch, the associated source and receiver attenuator pair, the associated
bias tee, and the bracket to which they are attached, must be removed as a complete
assembly.
6. Disconnect the ribbon cables (item
7. Disconnect the wire harness cable (item
from the A55 noise downconverter.
8. Disconnect the semirigid cables (item
step attenuator, and each bias tee to be removed.
9. Disconnect two screws (item
its wire harness attached, and place it aside.
10. Remove three screws (item
11. Move the disconnected semirigid cables out of the way and lift the attenuator bracket
out of the analyzer, with the attenuators and bias tee attached. It may be necessary to
remove additional cables, or to remove some disconnected cables completely, to remove
the attenuator bracket. If so, note the location and orientation of each for reinstallation
later.
12. Remove two screws to remove the bias tee bracket from the switch to be replaced.
13. Remove two screws to remove the test port switch to be replaced, from the mounting
bracket.
7-54
for this procedure.
"Removing the Covers" on page
7-8.
①
) from the attenuators to be removed.
④
) from the bias tee to be removed. Lift the bias tee, with
⑤
) that secure the attenuator bracket to the test set deck.
PNA Series Microwave Network Analyzers
"Removing and Replacing the Front Panel
②
), for the test port switch to be removed,
③
) from the test port switch, each associated
N5241A/42A
7-6.
Service Guide N5242-90001