Removing And Replacing The Front Panel Led Boards - Keysight Technologies N5221A Service Manual

Repair and Replacement Procedures

Removing and Replacing the Front Panel LED Boards

Removing and Replacing the Front Panel LED Boards
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)
— 1 inch open-end torque wrench (torque to 72 in-lb or 8.15 N.m)
— ESD grounding wrist strap
Removal Procedure
Refer to
Be careful not to damage the center pins of the semirigid cables. Some
flexing of the cables is necessary to remove assemblies but do not
over-bend them.
1. Disconnect the power cord.
2. Remove the test port couplers. Refer to
3. Remove two screws (item
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Perform the post-repair adjustments, verifications, and performance tests
7-54
Figure 7-18 for this procedure.
A29–A32 Test Port Couplers" on page
remove the LED board from the analyzer.
that pertain to this removal procedure. Refer to
"Removing and Replacing the
7-41.
①
) from the LED board to be removed and
Table 7-2 on page
Keysight N5221A/22A Service Guide
7-60.