Agilent Technologies 85032B/E 50 Specifiche Pagina 124

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Assembly Replacement 8712ET/ES and 8714ET/ES
A2 CPU Board Assembly Replacement RF Network Analyzers
3-6 Service Guide
A2 CPU Board Assembly Replacement
CAUTION Failure to follow instructions may result in an improperly operating analyzer.
Make a copy of the correction constants (seeChapter 8) before replacing the
A2 CPU assembly.
Ensure that your analyzer's firmware disk is available before replacing the
A2 CPU assembly. The replacement A2 CPU assembly may be shipped from
the factory with a different firmware revision than your current firmware
revision. If the replacement A2 CPU assembly was shipped with a different
firmware revision, but the original firmware revision is desired, you can
restore the original firmware from the analyzer's firmware disk. See
“Upgrading or Re-Installing Firmware” on page 8-5.
The replacement A2 CPU assemblies are suppliedwithout a bootROM chip and with the
latest version of firmware installed.
To restore the same operation that your original A2 CPU assembly had (which depended
upon the installed options and model number), adhere to the following instructions. If you
do not wish to use the latest version of firmware, you will need a firmware disk containing
the version desired.
CAUTION Perform the followingonly at an approved ESD workstation. SeeFigure 4-1
on page4-3.
Removing the CPU Board Assembly
WARNING Danger of explosion if battery is incorrectly replaced. Replace with
the same or equivalent type recommended. Discard used batteries
according to manufacturers instructions
1.Disconnect the power cord.
2.Disconnect all cables from the top row of connectors on the rear panel. Next, refer to
Figure 3-2on page3-7 and remove the anchoring screw just above the GPIB connector.
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