494 N9030B PXA Signal Analyzer Service Guide
Assembly Replacement Procedures
RF Area (Options 544, 550)
4. Reconnect the wire harness connector. Once connected, position the
connections along side the switches as shown in Figure 16-58. Plug in the
ribbon cable to the rear of the top switch.
5. Refer to Figure 16-57. Replace cable W52 (N9020-20125) (1) between
top switch port 4 to Low Band Switch J1. Torque to 10 inch-pounds.
6. Replace cable W54 (N9020-20127) (2) between top switch port 3 to Low
Band Switch J3. Torque to 10 inch-pounds.
7. Refer to Figure 16-56. Replace cable W60 (N9020-20128) (1) between
bottom switch port 4 to YTF. Torque to 10 inch-pounds.
8. Replace cable W8 (N9020-20131) (2) between Low Band Switch J2 to
Front End Assembly J2. Torque to 10 inch-pounds.
9. Replace cable W20 (N9020-20152) (3) between YTO to Front End
Assembly J4. Torque to 10 inch-pounds.
10.Replace cable W59 (N9020-20151) (1) between top switch port 2 to
bottom switch port 1. Torque to 10 inch-pounds.
11.Replace cable W61 (N9020-20129) (2) between bottom switch port 3 to
YTF Assembly. Torque to 10 inch-pounds.
12.Refer to Figure 16-54. Replace cable W62 (N9020-20130) (3) between
bottom switch port 2 to Front End Assembly J9. Torque to 10
inch-pounds.
13.Refer to Figure 16-53. Replace rigid cable W51 (N9020-20171) (1)
between top switch port 1 to Attenuator B output. Torque to 10
inch-pounds.
14.Route all ribbon cables to avoid being damaged when the top brace is
installed.
15.Refer to Figure 16-43. Position the RF bracket onto the chassis and
replace the sixteen screws (0515-0372). Torque to 9 inch-pounds.
16.Replace the front panel. Refer to the Front Frame Assembly replacement
procedure.
17.Replace the instrument outer case. Refer to the Instrument Outer Case
replacement procedure.
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