Cautions When Replacing The Lithium Battery; Replacing Procedure - Sony HDCU3500 Service Manual

1-4.

Cautions when Replacing the Lithium Battery

The lithium battery is installed on the SY-467 board. This lithium battery is used to back up the real-time clock (RTC).
RTC stops operating when the battery life expires. Replace the battery and reset the DATE (M03) of the
MAINTENANCE menu. (Refer to OPERATION MANUAL.)
Part No.
1-756-134-1X
!
CAUTION
Ensure that the battery is installed with + and – poles connected to the correct terminals. An incorrect
connection may cause an explosion or leakage of fluid.
1-4-1.

Replacing Procedure

Preparation
1. Remove the top cover. (Refer to
2. Remove the optical cable. (Refer to step 1 in
3. Remove the top chassis. (Refer to step 1 in
4. Remove the SY-467 board. (Refer to steps 1 and 2 in
Procedure
1. Replace the lithium battery on the SY-467 board.
SY-467 board
Note
When installing the lithium battery, install it to the orientation shown in the figure.
2. Install the removed parts by reversing the steps of removal.
HDCU3500/HDCU5500
Name
Lithium Battery (ML621 (U))
"2-2. Top Cover".)
"2-4-1. LEMO Connector
"2-5. Top Chassis/Air Distributor
"2-7. SY-467 Board/AT-195
Lithium battery
Hooks
Lithium battery
Battery holder
Hooks
Usage
For internal clock
Assembly".)
Assembly".)
Board".)
1-10