Removing And Replacing The A19 Test Set Motherboard - Keysight Technologies N5221A Service Manual

Repair and Replacement Procedures

Removing and Replacing the A19 Test Set Motherboard

Removing and Replacing the A19 Test Set Motherboard
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)
— 3/16 inch open-end torque wrench (torque to 6 in-lb or 0.68 N.m)
— 5/16 inch open-end torque wrench (torque to 10 in-lb or 1.13 N.m)
— 5/8 inch open-end torque wrench (torque to 21 in-lb or 2.38 N.m)
— ESD grounding wrist strap
Removal Procedure
Refer to
1. Disconnect the power cord.
2. Remove the outer cover. Refer to
3. Position the analyzer bottom side up.
4. Disconnect ALL ribbon cables (item
5. Remove connector hardware (item
6. Remove connector hardware (item
7. Remove 10 screws (item
8. Slide the A19 test set motherboard toward the front of the instrument until
Replacement Procedure
1. Reverse the order of the removal procedure. In Step 7, loosely reinstall ten
2. Perform the post-repair adjustments, verifications, and performance tests
Keysight N5221A/22A Service Guide
Figure 7-12 for this procedure.
from the A19 test set motherboard.
(When reinstalling, use a 5/8 inch open end torque wrench set to 21
in-lbs.)
connector. (When reinstalling, use a 3/16 inch open end torque wrench
set to 6 in-lbs.)
reinstalling, use a T-10 TORX driver set to 9 in-lbs.)
the rear panel BNC connectors are free of the rear panel, then lift the
motherboard and remove it from the analyzer.
screws in the A19 test set motherboard. After reinstalling connector
hardware on the rear panel, torque the ten screws to 9 in-lbs using the
T-10 TORX driver.
that pertain to this removal procedure. Refer to
"Removing the Covers" on page
①
) and ALL wire harnesses (item
③
) from 11 rear panel BNC connectors.
④
) from the rear panel TEST SET I/O
⑤
) from the A19 test set motherboard. (When
7-6.
Table 7-2 on page 7-60.
7-29
➁
)