Chapter 10 Maintenance; Lithium Battery Replacement; General; Lithium Battery Specification - NEC Xen Topaz System Hardware Manual

Maintenance
S 1
E C T I O N
L B
ITHIUM ATTERY
R
EPLACEMENT
System Hardware Manual

1.1 General

The Lithium Battery (SONY CR2450 or equivalent) is initially installed
on the 308M PCB in 924M KSU. It provides the battery-backup of the
RAM memory for approximately 36 months. When the battery life
becomes almost over, the system will inform the "Warning Message"
to the assigned Display Key Telephone as below.

1.2 Lithium Battery Specification

Before replacing the Lithium Battery, prepare the new Lithium Battery.
("SONY CR2450" or equivalent)
• Risk of explosion if the battery is replaced by an incorrect type.
• Dispose of used batteries as instructed by the manufacturer of the
battery.

1.3 Replacing the Lithium Battery

1. Open the Sub-Cover at the main KSU and make sure the SW1 is
set to "ON" (HOT Start)..
2. Power OFF the system, and remove the AC plug from the outlet..
Chapter 10
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