Agilent Technologies FieldFox N9923AN Service Manual page 92

Repair and Replacement Procedures
Removing and Replacing the Case Group Parts
Replacing the Front Case (including the A1 Keypad)
1. Separate the front and rear cases. See
2. Remove the measurement group assemblies (RF top panel assembly, A4 RF board, A5
system board, and A6 SOM board) as one unit with the I/O panel attached. Refer to
"Removing and Replacing the Measurement Group Assemblies" on page
3. Remove the front panel group assemblies (A2 LCD, A3 front panel interface board, and
RPG). Refer to "Removing and Replacing the Front Panel Group Assemblies" on
page 7-18.
Figure 7-10 Replacing the Front Case
4. Carefully remove the serial number label from the inside bottom of the old front case
and apply the label to the new front case.
5. Choose the appropriate model number nameplate overlay for your analyzer, remove the
protective backing to expose the adhesive, and adhere it in the location shown.
6. Remove the dowel pins (item 5) from the old front case and install them in the new case.
The other two dowel pins should already be installed in the case.
7. Make sure that the gaskets (item 6) are all in place in the grooves, that there are no
gaps, and that they are not damaged in any way.
8. Refer to "Removing and Replacing the Front Panel Group Assemblies" on page 7-18
reinstall the front panel group assemblies removed in
9. Refer to "Removing and Replacing the Measurement Group Assemblies" on page 7-25
reinstall the measurement group assemblies removed in
7-14
Separating the Front and Rear
step 3.
step
RF Vector Network Analyzer
N9923AN
Cases.
7-25.
2.
Service Guide N9923-90005
to
to