24
DTD-5230, DTD-5231, and DTD-5233 Installation and Operation Manual
:
Replacement Procedure
The battery is a Panasonic CR2032. It should be replaced only with a
battery of the same type and size. Before installation, verify that the
new battery voltage is 3.0 V or greater.
To replace a battery in the DTD-5230 and DTD-5233, follow this
procedure:
1. Remove AC power from the clock, and then remove the cover.
2. Lift the old battery from its socket, being careful not to damage
other components.
3. Short U4 Pin 16 and U4 Pin 10 to ground.
4. Install the new battery in the holder, noting the proper polarity.
5. Short U4 Pin 10 to ground for a moment.
6. Replace the cover, and then reapply AC power to the clock to
confirm start-up.
7. Remove AC power from the clock, and again remove the cover.
8. Confirm that U4 Pin 9 is exactly at ground.
Any
voltage greater than zero is not allowed (even a few tenths of a
volt). If you observe a non-zero voltage, remove the AC power and
battery, and then repeat this procedure from the beginning.
9. Confirm that the voltage of the new battery is still 3.0 V or greater.
10. Replace the cover, and then re-apply AC power to the clock.
The LED remains on.
11. Immediately perform the
Local Offset Programming
procedure set
out in
“Local Offset Programming” on page 15
.
