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2-4. Replacement of Main Parts
B302 (M4T28-BR12SH1) on the SY-253 Board
Replacement
8
7
6
5
B302 (on IC302)
n
The battery B302 (M4T28-BR12SH1) backs up the various
setting parameters of the menus.
This data is lost at the time when the battery is removed.
Before replacing the battery, write down the setting
parameters of the menus. (For the menu operations, refer
to the operation manual.)
Replacement part
Part name :
Lithium battery, M4T28-BR12SH1
Part number : 1-767-156-11
2-16 (E)
4
3
2
1
Removal procedures
1. Write down the setting parameters of the following
menus. (For the menu operations, refer to the opera-
A
tion manual.)
. Board parameter :
B
. System Configuration : "Service : Configuration"
. Hours Meter :
C
D
2. Remove the SY-253 board. (Refer to the Section 2-5-
9.)
E
3. Insert a tip of a flat-blade screwdriver between IC and
battery to remove the battery.
F
G
M4T28-BR12SH1
H
IC
Mark
Installation procedures
1. Align a new battery with the mark of IC, and insert it.
2. Install the SY-253 board in its original slot.
Setting after replacement
Set the following menus. (For the menu operations, refer
to the operation manual.)
. Board parameter :
. System Configuration : "Service : Configuration"
n
The hours meter cannot be set.
"Boards : Param"
"Service : Hours Meter"
Mark
Flat-blade screwdriver
"Boards : Param"
MAV-70
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