7-8 Keysight N5221A/22A Service Guide
Repair and Replacement Procedures
Removing and Replacing the Front Panel Assembly
7-
Removing and Replacing the Front Panel Assembly
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 open-end torque wrench (torque to 10 in-lb or 1.13 N.m)
— ESD grounding wrist strap
Removal Procedure
Refer to Figure 7-2 for this procedure.
1. Disconnect the power cord.
2. Remove the outer cover. Refer to “Removing the Covers” on page 7-6.
3. With a 5/16 inch torque wrench, remove all the semirigid jumpers (item
①) from the front panel.
4. With a T-10 TORX driver, remove the 12 screws (item
➁) from the sides of
the frame.
5. Slide the front panel over the test port connectors.
6. Disconnect the ribbon cable (item
③) from the A1 front panel interface
board.
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 7-60.
Before removing the front panel from the analyzer, lift and support the
front of the analyzer frame.
When reconnecting the front-panel jumpers, torque the connectors to 10
in-lb.
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