Removing And Replacing The Lithium Battery - Keysight N5221A Service Manual

Repair and Replacement Procedures

Removing and Replacing the Lithium Battery

Removing and Replacing the Lithium Battery
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)
• ESD grounding wrist strap
Removal Procedure
Refer to Figure 7-27 for this procedure.
1. Disconnect the power cord.
2. Remove the A17 CPU board. Refer to
7-22.
3. Remove top cover attachment screws (item
4. Lift the top cover off of the CPU board assembly.
5. Remove the battery from the battery holder by lifting it at the open end of the holder and then sliding it
from under the clip (item
6. DO NOT THROW AWAY THE BATTERY. COLLECT IT AS SMALL CHEMICAL WASTE. Refer to
Battery Disposal" on page 1-8
Replacement Procedure
1. Reverse the order of the removal procedure following all instructions included with the new battery.
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
"Removing and Replacing the A17 CPU Board Assembly" on page
①
) and (item
③
).
for additional information on battery disposal.
7-56.
PNA Series Microwave Network Analyzers
➁
).
Service Guide N5222-90001
N5221A/22A
"Lithium