Keysight N5227A - Removing and Replacing the Rear Panel

7-46 Service Guide N5227-90001
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the Rear Panel N5227A
Removing and Replacing the Rear Panel
Tools Required
• T-10 TORX driver (torque to 9 in-lb or 1.02 N.m)
• T-20 TORX driver (torque to 21 in-lb or 2.38 N.m)
• 5/16 inch nutsetter (torque to 10 in-lb or 1.13 N.m)
• 5/16 inch nutsetter (torque to 21 in-lb or 2.38 N.m)
• 5/8 inch nutsetter (torque to 21 in-lb or 2.38 N.m)
• 9/32 inch nutsetter (torque to 9 in-lb or 1.02 N.m)
• 3/16 inch nutsetter (torque to 6 in-lb or 0.68 N.m)
• 9/16 inch nutsetter (torque to 21 in-lb or 2.38 N.m)
• 9 mm nutsetter (torque to 21 in-lb or 2.38 N.m)
• ESD grounding wrist strap
Removal Procedure
Refer to Figure 7-20 for this procedure.
1. Disconnect the power cord.
2. Remove the outer and inner covers. Refer to “Removing the Covers” on page 7-6.
3. Remove the A20 power supply assembly. Refer to “Removing and Replacing the A20 Power Supply
Assembly” on page 7-16.
4. Remove the A21 CPU board assembly. Refer to “Removing and Replacing the A21 CPU Board Assembly”
on page 7-18.
5. Remove the 50 ohm load(s) (item
➁).
6. If installed, remove the cap (item
③
).
7. Remove the connector hardware (item
④
) from each of the five multi-pin connectors. The hardware is
not the same on each connector so note which hardware goes with which connector.
8. Remove the connector hardware (item
⑤
) from each of the RF connectors. The hardware is not the
same on each connector so note which hardware goes with which connector.
9. Remove the 13 screws (item
⑥
) that attach the rear panel to the chassis.
10. Slide the rear panel over the cable connectors and off of the analyzer.
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal
procedure. Refer to Table 7-2 on page 7-54.