Keysight N5224A/25A Service Guide 7-49Repair and Replacement ProceduresRemoving and Replacing the A55 Solid State Drive (SSD)Removing and Replacing the A55 Solid State Drive (SSD)Certain unique files exist on the SSD that are necessary for proper operation ofyour analyzer. These files must be copied to another location to allow them tobe installed onto the new SSD after it has been installed.If you are replacing the SSD, the following procedure must be performed first.Copy Unique Files from the SSDIf installing an SSD for Windows XP: if the user has loaded unique calibrationkit information, navigate to C:\Program Files\Keysight\NetworkAnalyzer and copy USER_CALKITFILE to a USB flash memory drive. Also copyany personal user files that you wish to preserve.If installing an SSD for Windows 7: for more information on the N8983A SSD,refer to the Windows 7 Operating System Upgrade Kit Installation Note,available online athttp://literature.cdn.keysight.com/litweb/pdf/N8983-90001.pdf.Tools Required— T-10 TORX driver (torque to 9 in-lb or 1.02 N.m; for solid state drivereplacement)— ESD grounding wrist strapRemoval ProcedureRefer to Figure 7-22 for this procedure.1. Disconnect the analyzer power cord.2. Position the analyzer for access to the rear panel.3. Loosen the SSD assembly thumb screw (item ①).4. Pull the SSD assembly out from the CPU assembly, using the handle (item➁).