7-52 Service Guide N5227-90001
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the Lithium Battery N5227A
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 7-22 for this procedure.
1. Disconnect the power cord.
2. Remove the solid state drive (SSD) from the A21 CPU board. Refer to “Removing and Replacing the A55
Solid State Drive (SSD)” on page 7-42.
3. Remove 22 top cover attachment screws (item
①
).
4. Remove the top cover from the A21 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
➁).
6. DO NOT THROW AWAY THE BATTERY. COLLECT IT AS SMALL CHEMICAL WASTE. Refer to “Lithium
Battery Disposal” on page 1-8 for additional information on battery disposal.
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.
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