546 Keysight N9038A MXE Service Guide
Assembly Replacement Procedures
RF Area - Option 503, 508, & 526
Replacement
1. Inspect the chassis where the YTF Preselector mounts and remove the gap
pad if present (see Figure 18-14, item (1)). The gap pad may remain
attached to the faulty YTF Preselector.
2. Refer to Figure 18-14. Install the replacement gap pad (1) (5022-7179)
into the recess in the base of the replacement YTF Preselector (2) Refer to
A12MP1 in Chapter 17, “Replaceable Parts.”. Peel back one corner of the
clear plastic backing on the pink side of the gap pad. Remove the blue
backing from the other side of the gap pad. Install the gap pad as shown
with the pink side exposed. Carefully peel off the clear plastic backing and
smooth the gap pad into the recess.
Figure 18-14 Gap Pad Installation
3. Refer to Figure 18-13. Place the YTF Preselector into the chassis with the
ports toward the front of the instrument. Replace the four screws (1)
(0515-0372). Torque to 9 inch-pounds.
4. Figure 18-12. Replace the cables W25, W39, W40, and W43. Torque to
10 inch-pounds.
5. Replace the wire harness W12.
6. Refer to Figure 18-7. Position the Chassis Right Side Outer bracket onto
the chassis and replace the sixteen screws (0515-0372). Torque to
9 inch-pounds.
7. Replace the top brace. Refer to the Top Brace and Power Supply Bracket
replacement procedure.
8. Replace the front panel. Refer to the Front Frame Assembly replacement
procedure.
9. Replace the instrument outer case. Refer to the Instrument Outer Case
replacement procedure.
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