First introduce the principle of quartz clock.
There is an integrated circuit in the quartz clock, which, together with a component called a crystal, forms an oscillator that generates a pulse of 32.768 kHz. And divided by the divider inside the IC (divided by 32768) to output a pulse signal of 1 Hz (ie one pulse per second), and then use this signal to drive a solenoid so that every second coil It was excited once, and then led the second bounce. Then there is a gear system, making the second hand each go over 60 cells, the minute hand to jump about; minute hand beating 12, the hour hand beating a small grid, so when the minute hand beats sixty, the clock left five small grid, A word (1 hour).
The crystal and the other components in the circuit (mainly the surrounding capacitances) together determine the frequency of the oscillator. If the frequency is not accurate 32.768KHz, then the clock is not allowed to go. If the frequency gets higher, the clock will go faster; the other hand, the clock will go slower. Under normal circumstances, for a good circuit has been designed and debugged, the accuracy is within the allowable range, the error will not be too much within a day. However, if there is a change in component parameters, the error will be great. Such as internal moisture, or temperature changes too much, or component damage, or the battery voltage is too low will have an impact.
Encountered when the quartz clock is not accurate when you go, you can check the battery, or for a new battery. If you are still not allowed, you should ask people who are familiar with electronic circuits to help check the interior, clean up the dust or dehumidification. No longer need to adjust the crystal next to the capacitor or crystal change. However, due to the internal components of the movement is very small, remember to be careful operation, careful damage to the circuit board or coil and other parts.