Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide 357
Assembly Replacement
A3 RF Assembly (N5166B, N5172B, and N5182B)
d. “Front-Panel” on page 342
10.For Option 1EM instruments, skip to step 10. For all other instruments,
refer to Figure 15-9. Using the T-10 driver, remove the 3 screws (1) that
connect the RF In connector to the chassis.
11.Refer to Figure 15-8. Using the T-10 driver, remove the 10 screws (1) that
connect the A3 RF assembly to the chassis.
12.Refer to Figure 15-10. Place the tip of a medium common screwdriver into
one of the three pry slots on the A3 RF assembly and twist the screwdriver
to release the board from the connector pins.
13.Repeat step 11 with the other two pry slots.
14.Remove the A3 RF assembly as shown in Figure 15-11.
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Recommended torque for Front Panel screws is 21 in-lbs. Recommended
torque for all other screws is 9 in–lbs.
3. Recommended torque for all BNC connectors is 21 in–lbs.
4. See Chapter 16, “Pre and Post-Repair Procedures” and perform the “Post
Repair Procedures” outlined for the replacement of this assembly.
The RF Connector can be easily damaged. Use extreme caution when
disconnecting and reconnecting the RF connector bracket from and to the
instrument chassis.
When plugging in the A3 RF assembly into the A2 board, it is important to have all
boards loose in order to ensure proper connector mating. Follow these steps:
a. It will be necessary to loosen the screws attaching the A2 Vector BBG
assembly (and the A7 Real Time BBG assembly if Option 660 is present) to
the chassis before plugging in the A3 RF assembly.
b. Refer to
Figure 15-14, “Loosen A2/A7 Boards screws.” Loosen the A7
Real Time BBG assembly screws (1) and the A2 Vector BBG assembly
screws (2). After the A3 RF assembly is plugged into the A2 board, tighten
all the screws. Torque to 9 in-lbs.
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