Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide 347
Assembly Replacement
A2 Vector BBG Assembly (N5166B, N5172B, and N5182B)
A2 Vector BBG Assembly (N5166B, N5172B, and N5182B)
Tools Required
— T-10 driver
— 5/16” open-ended wrench
— needle-nose pliers
Removal Procedure
Refer to Figure 15-6 for this procedure.
1. Before replacing the A2 Vector BBG 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. Remove the rear panel from the signal generator. Refer to “Rear Panel
(N5166B, N5172B, and N5182B)” on page 405.
5. Place the signal generator flat with the A2 Vector BBG assembly facing up
and the rear panel facing you.
6. Refer to Figure 15-6. Use the needle-nose pliers to disconnect the cables
from the following locations:
— A2J15, I Input, W4 (W17 for Option 1EM instruments).
— A2J16, Q Input, W5 (W18 for Option 1EM instruments).
7. Remove the cable clamp and cable W6.
8. Using the 5/16” open-ended wrench, disconnect the following cables
according to the instrument you have:
— Instruments without Option 012: Remove cables W7 and W8.
— Instruments with Option 012: refer to Figure 15-7. Remove cables
W13, W14, and W15.
The rear panel must be removed to allow the pin connector on the A2
Vector BBG assembly to be disconnected from the A3 RF assembly
without damaging the connector pins.
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