432 Keysight NFA Series Noise Figure Analyzers Service Guide
Assembly Replacement Procedures
Power Supply Assembly
Replacement
1. Slide the power supply assembly into the slot at the rear of the instrument
and push on the assembly to mate the connectors to the midplane
assembly.
2. Refer to Figure 15-32. Replace the three screws (1) through the power
supply bracket (3) and into the power supply (2). Torque to
9inch-pounds.
3. Replace the CPU assembly. Refer to the “CPU Assembly” replacement
procedure.
4. Replace the reference assembly. Refer to the “Reference Assembly”
replacement procedure.
5. Replace the top brace and reference bracket. Refer to the “Top Brace”
replacement procedure.
6. Replace the rear panel. Refer to the “Rear Panel” replacement procedure.
7. Replace the instrument outer case. Refer to the “Instrument Outer Case”
replacement procedure.
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