Keysight N9038A MXE Service Guide 581
Assembly Replacement Procedures
RF Preselector Input Assembly
RF Preselector Input Assembly
Removal
1. Remove the instrument outer case. Refer to the Instrument Outer Case
removal procedure.
2. Remove the top brace. Refer to the Top Brace and Power Supply Bracket
removal procedure.
3. Refer to Figure 18-39. Locate the RF Preselector Input assembly (4).
4. Refer to Figure 18-42. Remove cables W31, W32, W33, W34, and W36
using the 5/16-inch wrench.
5. Remove ribbon cables W1, and W2.
6. The RF Preselector Input assembly can now be unplugged from the
motherboard by using the ejector on the RF Preselector Input assembly to
disconnect from the motherboard and lift out of the chassis.
Replacement
1. Slide the RF Preselector Input assembly into the chassis and press down
to plug it into the motherboard using the ejector to push into place.
2. Refer to Figure 18-42. Replace cables W31, W32, W33, W34, and W36.
Torque to 10 inch-pounds.
3. Replace the top brace. Refer to the Top Brace and Power Supply Bracket
replacement procedure.
4. Replace the instrument outer case. Refer to the Instrument Outer Case
replacement procedure.
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