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Reasons that quartz crystal does not work

Crystal oscillator can not cause vibration may be due to improper circuit constants or (quartz crystal, 32.768K, watch crystal, SMD crystal, ceramic crystal) itself is faulty. Circuit constant is correct, even if the electrical characteristics of the crystal within the specified level of instability, then the circuit will produce normal oscillation. Circuit constants, crystal oscillation of electrical characteristics will lead to oscillation stop. Oscillation of the crystal oscillation phenomenon or can not be oscillated, should check the cause of this problem, quartz crystal failure, crystal and integrated circuit does not match, reset the program error. This integrated circuit is not used as an amplifier and can not oscillate in any way. Therefore, the operation of the integrated circuit should first check. Check the integrated circuit operation is very simple, just put the input terminal of the integrated circuit connected to the power supply or ground to check whether the output signal is reversed. The integrated circuit is used for the inverter and the output signal must be inverted. Integrated circuit for the inverter, but still can not produce oscillation, PC board above the crystal (oscillation circuit) must have a problem.