Keysight Technologies N5222B, Service Manual

Page: 186 / 226

7-10 Keysight N5290/1A Service Guide
Repair and Replacement Procedures
Removing and Replacing the Front Panel and Subpanel Assemblies
7-
Removing and Replacing the Front Panel and Subpanel Assemblies
Tools Required
— T-10 TORX driver (set to 9 in-lb)
— T-20 TORX driver (set to 21 in-lb)
— 5/16 inch open-end torque wrench (set to 10 in-lb)
— ESD grounding wrist strap
Front Panel Removal Procedure
Refer to Figure 7-4 on page 7-12 and Figure 7-5 on page 7-13 to for this
procedure.
1. Power down the test set.
2. Disconnect the power cord.
3. Remove the outer cover. Refer to “Removing the Cover” on page 7-8 .
4. With a 5/16 inch torque wrench, remove all the semi-rigid jumpers (item
①
) from the front panel.
5. With a T-10 TORX driver, remove the 4 screws (2-Port) and 5 screws
(4-Port) – (item
➁
) from the front panel.
6. With a T-20 TORX driver, remove the 4 screws (item
③
) from the sides of
the front panel.
7. Disconnect the power switch cable (item
④
) from the power switch PCA.
8. Slide the front panel over the test port connectors.
Subpanel Removal Procedure
This procedure assumes you have already removed the front panel assembly.
Refer to Figure 7-4 on page 7-12 for this procedure.
1. With a 5/16 inch torque wrench, remove the ends of the port 1 and port 2
N5292-60020 ((x2) long, item
①
) from the where they connect to the back
of the subpanel.
2. 4-Port only : With a 5/16 inch torque wrench, remove the ends of the port
3 and port 4 N5292-60019 ((x2) short cables (item
➁
) from the back of the
subpanel (i.e., these are the short cables that connects to the phase
compensation PCA).
Before removing the front panel from the test set, lift and support the front
of the test set frame.