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B401 (CR2025) on the SY-253 Board Replacement
8
6
5
7
B401
n
The battery B401 (CR2025) backs up the database of file.
Replace this battery within 24 hours after the SY-253
board is pulled out from the slot.
If 24 hours or more have passed, the backup data will be
lost.
Replacement part
Obtain a commercial lithium battery.
Part name :
Lithium battery
Specifications : Model
Voltage
Capacity
MAV-70
4
3
2
1
CR2025
3 V
120 mAH
Removal procedures
1. Remove the SY-253 board. (Refer to the Section 2-5-
A
9.)
2. Remove the battery.
B
C
D
E
F
G
H
Installation procedures
1. Install a new battery on the SY-253 board.
At this time, put the lithium battery with the "+"
terminal side up.
2. Insert the SY-253 board in its original slot.
Setting after replacement
It is not necessary to set after battery replacement.
2-4. Replacement of Main Parts
Raise the battery
while pushing in.
2-15 (E)
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