Keysight N5224B, Service Manual, Page: 539 / 614

Keysight N5224B/25B Service Guide 7-33
Repair and Replacement Procedures
Removing and Replacing the A23 Test Set Motherboard
Removing and Replacing the A23 Test Set Motherboard
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)
— 5/8 inch nutsetter (torque to 21 in-lb)
— ESD grounding wrist strap
Removal Procedure
Refer to Figure 7-16 for this procedure.
1. Disconnect the power cord.
2. Remove the outer cover. Refer to “Removing the Covers” on page 7-7 .
3. Position the analyzer bottom side up.
4. Disconnect ALL ribbon cables (item

) and ALL wire harnesses (item

)
from the A23 test set motherboard.
5. Remove connector hardware (item

) from 11 rear panel BNC
connectors.
6. Remove 10 screws (item

) from the A23 test set motherboard.
Before replacing the A23 test set motherboard, if possible:
Run EEBackup.exe using the directory for your Windows operating system:
Windows 7 OS :
C:/Program Files (x86)/Agilent/Network Analyzer/Service/EEBackup.exe.
Click on Save EEPROM Backup, and then click on Backup TSMB Memory.
Windows 10 OS (32-bit) :
C:/Program Files (x86)/Keysight/Network Analyzer/Service/EEBackup.exe.
Click on Save EEPROM Backup, and then click on Backup TSMB Memory.
The firmware revision numbers for Win10 (32-bit) are A.13.30.xx through
A.13.95.xx.
Windows 10 OS (64-bit) :
C:/Program Files/Keysight/Network Analyzer/Service/EEBackup.exe. Click
on Save EEPROM Backup, and then click on Backup TSMB Memory.
The firmware revision numbers for Win10 (64-bit) are A.14.00.xx and up.
If it is not possible to back up the EEPROMs and the TSMB Memory, the
data files might not be the most current. In this case, the backup data will
contain the original factory information. If you have problems, “Contacting
Keysight” on page 2-7 .