356 Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide
Assembly Replacement
A3 RF Assembly (N5166B, N5172B, and N5182B)
A3 RF Assembly (N5166B, N5172B, and N5182B)
Tools Required
— T-10 driver
— 5/16” open-ended wrench
—Flat-head screwdriver
Removal Procedure
1. Before replacing the A3 RF assembly see Chapter 16, “Pre and Post-Repair
Procedures” and perform the “Pre Repair Procedures” outlined for this
assembly.
2. Disconnect the power cord.
3. Remove the covers from the signal generator. Refer to “Outer Cover” on
page 336, “Inner Top Cover” on page 338, and “Inner Bottom Cover” on
page 340.
4. Place the signal generator flat with the A2 Vector BBG assembly facing up
and the rear panel facing you.
5. Referring to Figure 15-12, remove the Cable Clamp and cable W6.
6. Using the 5/16” open-ended wrench, disconnect the following cables
according to the instrument you have.
Instruments without Option 012 refer to Figure 15-12, remove W7 and W8.
Instruments with Option 012 refer to Figure 15-13, remove W8 and W14.
7. Place the signal generator flat with the A3 RF assembly facing up.
8. Refer to Figure 15-8. Remove ribbon cable W1.
9. Remove the following assemblies, in the order listed
a. “A4 SSD (N5166B, N5172B, and N5182B only)” on page 365
b. “A5 CPU” on page 369
c. “Rear Panel (N5166B, N5172B, and N5182B)” on page 405
Do not disconnect the RF connector cable from the A3 RF assembly
or the RF connector itself. Removing the cable will result in
instrument failure.
Pry slots have been provided on both sides of the A3 RF assembly to aid in
removing the board.
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