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2-5. Backup Battery Replacement
2-6. DC Fan Motor Replacement
2-5. Backup Battery Replacement
RAM backup battery (BT1) is mounted on the CPU-94
board. Replace the battery with the following as shown in
the part list.
Backup battery : Nickel-cadmium battery
Specifications
Sony Part No. : 1-528-202-11
m
• The battery is guaranteed for the life of three years under
normal condition of usage. Replace the battery within
three years. If the battery runs down, turning off the
power stops the function of internal clock.
• When the optional BKDS-RS1690 is not mounted,
battery replacement deletes the crosspoint data.
(For details on data setting, refer to the supplied Installa-
tion Manual for software.)
Replacement
1. Turn off the power.
2. Pull out the CPU-94 board.
3. Replace the battery (BT1) on the CPU-94 board.
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• Set the polarity (+) of the battery to the polarity (+) of
the board at soldering.
• Nickel-Cadmium batteries are recyclable.
You can help preserve our environment by returning
your unwanted batteries to your nearest Sony Service
Center or Factory Service Center for collection, recy-
cling or proper disposal.
Note : In some areas, the disposal of nickel-cadmium batteries
in household or business trash may be prohibit.
CPU-94 board (A SIDE)
BT1
4. After Battery Replacement
• When the optional BKDS-RS1690 is mounted, execute
"G: UPDATE BACKUP CONTROLLER" from the
primary station control terminal.
• When the optional BKDS-RS1690 is not mounted,
execute "T: SET CLOCK" from the primary station
control terminal.
(For more details, refer to "5-1. Setting Items of the
Primary Station" in the Installation Manual.)
2-4(E)
2-6. DC Fan Motor Replacement
w
For your safety, turn off the power and unplug the power
plug from the outlet before starting the replacement.
Model
GB50H
Replacement
Voltage
3.6 V
1. Remove the top plate. (Refer to "2-1. Removal of
Capacity 50 mAh
2. Remove the two screws, then take out the DC fan
3. Disconnect the connector (CN2) on the DUS-971
4. Replace and attach the DC fan in the reverse order of
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• Install the DC fan in position the air blowing to rear.
• Hold the cable by the harness clamper to keep the cable
BT1
Cabinet".)
cover.
board.
steps 1 to 3.
away from the DC fan.
Air flow
DUS-971 board
CN2
Rotative
direction
of Fan
DC fan
DC Fan cover
B 4X30
BVS-A3232
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