What is Z1 parts of the circuit diagram of ledtec timer IT-88 model?

The Z1 component in the circuit diagram of the LEDTEC timer IT-88 model typically refers to a Zener diode. It is used for voltage regulation, ensuring that the voltage across certain parts of the circuit remains constant despite variations in input voltage. This stabilizes the operation of the timer and protects sensitive components from voltage spikes. Proper functioning of Z1 is crucial for the reliable performance of the timer.