System Hardware Manual - 77
Doc. No. 8846 - Release 1.1
September 2004
Maintenance Chapter 10
S
ECTION
1
LITHIUM BATTERY
R
EPLACEMENT
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
)
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..
• Risk of explosion if the battery is replaced by an incorrect type.
• Dispose of used batteries as instructed by the manufacturer of the
battery.
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