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RF Vector Network Analyzer
N9923AN
Removing and Replacing the Measurement Group Assemblies
Tools Required
• T-8 TORX driver (set to 6 in-lb)
• T-10 TORX driver (set to 9 in-lb)
• 5/16-inch open-end torque wrench (set to 10 in-lb)
• 9/16-inch open-end torque wrench (set to 21 in-lb)
•
Repair and Re-assembly
Before beginning any repair, remove the battery and disconnect
WARNING
external power.
Removing All Measurement Group Assemblies as One Unit
1. Separate the front and rear cases. Refer to
page
7-8.
2. Disconnect the A5 system board to A3 FPIB cable, W14, at the A3 FPIB connector. If
replacing this cable, disconnect both ends.
3. Lift the measurement group assemblies out of the front case and position them to the
side of the front case as shown.
4. Disconnect the A2 LCD to A5 system board cable, W11, at the A5 system board
connector. It is necessary to first remove the adhesive tape that is over the connector. To
replace this cable, refer to
page
7-20.
5. The measurement group assemblies are now completely separated from the analyzer.
6. To remove the I/O panel, refer to
page
7-12.
Service Guide N9923-90005
Removing and Replacing the Measurement Group Assemblies
Kit. Refer to
"Miscellaneous Parts" on page
"Separating the Front and Rear Cases" on
"Replacing the A2 LCD, the LCD Shield, and LCD Cables" on
"Replacing the I/O Side Panel, Doors, and Gasket" on
Repair and Replacement Procedures
6-12.
7-25
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Troubleshooting
