Replacing Lithium Battery; Note On Replacement Of Lithium Battery - Sony HDC-P50 Service Manual

2-3. Replacing Lithium Battery

2-3-1. Note on Replacement of Lithium Battery

A lithium battery is mounted on the SY-471 board to back up the real time clock (RTC).
If this unit is not energized, the backup period is about two years. When the RTC is reset without using this unit for long time, charge
the lithium battery by energizing this unit all day long.
When the backup period is shortened even if the lithium battery is charged, the lithium battery must be replaced.
• Replacement part: Lithium secondary battery (ML621 (U))
• Part number: 1-756-134-18
!
Note on Replacement of Lithium Battery
CAUTION
When replacing the lithium battery, ensure that the battery is installed with "+" and "-" poles connected to the correct terminals.
Improper connection may cause an explosion or leakage of fluid, resulting in injury or damage to surrounding properties.
2-3-2. Replacing Lithium Battery
1. Remove the inside assembly. (Refer to "4-5. Inside Assembly".)
2. Remove the AT-195 board. (Refer to "4-20. AT-195 Board".)
3. Remove the Lithium secondary battery (ML621 (U)) from the four hooks of the battery holder, and replace it.
Note
Be sure to use an insulating stick to remove the Lithium secondary battery (ML621 (U)).
4. Install the removed parts by reversing the steps of removal.
5. The date and time in the internal clock to be set. (For setting method, refer to Operation Manual.)
Hooks
Lithium secondary battery
SY-471 board
The illustration shows an HDC-P50.
Hooks
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