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2-4. Replacing the Backup Battery
2-5. Notes on Repair Parts
2-4. Replacing the Backup Battery
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When replacing the lithium battery, ensure that the marks + and _ are correctly oriented.
If connected incorrectly, injuries and damage to objects in the periphery may result from tears and
leakage of fluid.
The unit is equipped with a battery for data backup (BT1) on the CPU-293 board.
When replacing, be sure to use the following specified part.
Replacement Part:
BT1/CPU-293 board (E4)
Part Description:
CR-2450 (lithium battery)
Part No.:
1-528-229-41
The CPU-293 board incorporates a clock for recording the time and date at which the reference files and
scene files were stored in the IC memory card.
The backup battery maintains the time of the clock when the power is OFF. Therefore, when data is
stored on the IC memory card with worn out battery, the correct time and date will not be recorded.
When writing the data in the IC memory card with battery starting to run out, an alarm message will be
displayed on the EL display. Replace the battery when this alarm message is displayed.
After replacement, set the time and date. (Refer to the operation manual.)
Even if the battery runs out, the correct time and date can be recorded by setting the time of the unit
before writing the data on the IC memory card.
2-5. Notes on Repair Parts
1. Safety Related Components Warning
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Components marked ! are critical to safe operation. Therefore, specified parts should be used in the
case of replacement.
2. Standardization of Parts
Some repair parts supplied by Sony differ from those used for the unit. These are because of parts
commonality and improvement.
Parts list has the present standardized repair parts.
3. Stock of Parts
Parts marked with "o" at SP (Supply Code) column of the spare parts list may not be stocked.
Therefore, the delivery date will be delayed.
4. Units Representation
The following represented units are changed or omitted in writing.
Units
Capacitance
uF
Inductance
uH
Resistance
Z
2-6 (E)
Representation
uF
uH
Abbreviation
BKP-7934 IMM
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