7-58 Keysight N5221A/22A Service Guide
Repair and Replacement Procedures
Removing and Replacing the Lithium Battery
7-
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 “Removing and Replacing the A17
CPU Board Assembly” on page 7-25.
3. Remove top cover attachment screws (item
①) and (item ➁).
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
③).
6. DO NOT THROW AWAY THE BATTERY. COLLECT IT AS SMALL CHEMICAL
WASTE. Refer to “Lithium Battery Disposal” on page 1-10 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 7-60.
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