28 UDC-5212 and DTD-5225 Digital Time/Date Display Clocks Installation and Operation Manual
Chapter 3: Supporting Information
10. Confirm that U4 Pin 9 is exactly at GROUND. Any voltage greater
than zero is not allowable, even a few tenths of a Volt. If a non-zero
voltage is observed, remove AC power, remove battery B1, and
repeat this procedure from the beginning.
11. Confirm that the voltage of battery B1 is still 3.0 Volts or greater.
12. Re-attach the back panel completely, re-installing all screws.
13. Apply AC power to the clock. The LED will remain ON.
Immediately perform the Local Offset procedure described in
“Clock Setting Controls” for the appropriate model of clock.
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