Keysight Technologies N9040B UXA Signal Analyzer Service Guide 427
Assembly Replacement Procedures
A27 H1G Assembly (Option H1G)
A27 H1G Assembly (Option H1G)
There are two versions of Option H1G hardware that have been installed in the
instrument. The early version is no longer available. Only the latest version is
available for repair purposes.
The early version is identified by the presence of the rear panel connector IF 2
IN, and a semi-rigid jumper cable that connects IF 2 IN to IF 2 OUT.
The latest version of Option H1G hardware only has the rear panel IF 2 OUT
connector. The jumper cable is not present. Also the coaxial cable input
/output connections on the H1G assembly have been re-color coded, which
means you will need to remove and replace color bands on some flex coax
cables when replacing the early H1G hardware with the latest version. The
latest H1G assembly is provided as a replacement kit that includes a hole plug
and the cable color bands. These color bands and hole plug are only required if
you are replacing the early version H1G assembly.
Replacement process when the H1G assembly is the early version
Removal
1. Remove the instrument outer case. Refer to the “Instrument Outer Case”
removal procedure.
2. Remove the top brace. Perform step 3 in the “Top Brace and Card Cage
Brace” removal procedure. Save the screws for reuse.
3. On the rear panel remove the semi-rigid jumper cable between IF 2 IN and
IF 2 OUT connectors. Discard this cable.
4. Remove the IF 2 IN and IF 2 OUT connector nuts and washers. Use a
5/16-inch wrench. One of these nuts and washers will be reused.
5. Remove the screws from the rear panel and carefully pull away from the
instrument. Avoid damaging the cables still attached. Remove the IF 2 IN
and IF 2 OUT cables from the rear panel.
6. Refer to Figure 15-76. Remove the rear brace (1) by removing the four
screws (2) (0515-0372) and the seven screws (3) (0515-1946).
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