426 Keysight Technologies N9040B UXA Signal Analyzer Service Guide
Assembly Replacement Procedures
A22 & A23 Wideband Digital I.F. Boards
Replacement
1. Refer to Figure 15-75. Reinstall the Wideband I.F. boards into the slots as
shown. Use the ejectors to mate the boards to the rear motherboard and
lock into place.
2. Reconnect the ribbon cables to the boards. Place the spring clips into
place to hold the ribbon cable.
3. For Serial Number Prefix < 5605 Options 508, 513, 526:
— Refer to Figure 15-73. Reinstall the rear brace (1) into position.
Secure with the five screws (2) (0515-0372) and the one or two
screws (3) (0515-1946). Torque all screws to 9 inch-pounds.
4. For Serial Number Prefix ≥ 5605 and All Options 544 and 550:
— Refer to Figure 15-74. Reinstall the rear brace (1) into position.
Secure with the four screws (2) (0515-0372) and the one or two
screws (3) (0515-1946). Torque all screws to 9 inch-pounds.
5. Replace the top brace as described in the “Top Brace and Card Cage
Brace” replacement procedure.
6. Replace the instrument outer case. Refer to the “Instrument Outer Case”
replacement procedure.
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