Removing And Replacing The A54 Option 029 Test Port 2 Bridge And The A55 Option 029 Noise Downconverter - Agilent Technologies N5242A Service Manual

Repair and Replacement Procedures

Removing and Replacing the A54 Option 029 Test Port 2 Bridge and the A55 Option 029 Noise Downconverter

Removing and Replacing the A54 Option 029 Test Port 2
Bridge and the A55 Option 029 Noise Downconverter
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 7-26
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 A54 test port 2 bridge, the A55 noise downconverter, and the cable connecting
these two assemblies, must be removed as a complete assembly.
6. Disconnect the ribbon cable (item
7. Disconnect the wire harness cables (item
8. Disconnect three semirigid cables (item
A55 noise downconverter.
9. Disconnect two semirigid cables (item
10. Remove the hex nut (item
bridge to the side frame.
11. Remove three screws (item
frame.
12. Move the disconnected cables out of the way and lift out the A54/A55 assembly.
13. Remove the assembly to be replaced.
7-56
for this procedure.
"Removing the Covers" on page
7-8.
①
) from the A55 noise downconverter.
⑥
) and the screw (item
⑧
) that secure the A55 noise downconverter to the side
PNA Series Microwave Network Analyzers
"Removing and Replacing the Front Panel
②
), from the A55 noise downconverter.
③
) and one flexible RF cable (item
⑤
) from the A54 test port 2 bridge.
⑦
) that secure the A54 test port 2
N5241A/42A
7-6.
④
) from the
Service Guide N5242-90001