What happened when the power was suddenly cut off and the power was restored, and the perpetual calendar stopped displaying?

The reasons why the digital calendar cannot be displayed in case of sudden power failure and incoming call are as follows:

1. The digital calendar suddenly loses power during operation, resulting in the burning of the transformer inside the digital calendar, which leads to the inability to open the digital calendar. Just replace the transformer.

Second, the circuit board of the digital calendar movement crashed, which is relatively easy to solve. Open the circuit board of the digital perpetual calendar movement, find the capacitor of 470uF/ 10V, connect the two pins of this capacitor in series with metal, and restore the factory setting of the digital perpetual calendar, and then restart the machine to adjust the time.