
8712ET/ES and 8714ET/ES Assembly Replacement
RF Network Analyzers A2 CPU Board Assembly Replacement
Service Guide 3-7
Figure 3-2. Location of the Anchoring Screw on the CPU Assembly
3.Remove the front panel assembly (see“Removing the Front Panel Assembly” on page
3-4). Remove both the nut plates on the left and right handles.
4.Remove the display assembly (see“Removing the Front Panel Assembly” on page 3-4).
5.Remove the CPU assembly from its cavity.
6.Exchange the bootROM chips as follows:
NOTE Exchanging the bootROM must be done in order for the CPU board
to function.
a.Locate bootROM U335 chip on the old assembly. SeeFigure 3-3on page3-8.
b.Carefully use the IC extractor tool (included in the service kit) to remove the
bootROM chip.
c.Carefully insert the original bootROM chip into the replacement CPU board, making
sure that it is properly oriented.
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