There are chip crystal oscillators and plug-in crystal oscillators in crystal oscillators, passive crystal oscillators and active crystal oscillators with voltage. The crystal oscillator is very easy to damage.
The main function of the crystal oscillator on the computer motherboard is to generate the clock frequency. After the original clock frequency is amplified or reduced by the frequency amplifier, it becomes the frequency of each bus in the computer. The crystal oscillator on the main board also has the function of generating oscillating current in the circuit and sending out clock signals. The mainboard crystal oscillator is very important. The mainboard crystal oscillator is broken, which usually manifests as failure to boot, no response from the boot display, black screen, and shutdown after booting.
1. 12 MHz crystal oscillator. Now there is a 12 MHz crystal oscillator on some motherboards. This crystal oscillator is mainly used for the USB interface. If it is damaged, it may cause problems such as failure of the USB interface.
2. 14.318 MHz clock crystal oscillator, used for clock chips. The 14.318 MHz crystal oscillator does not oscillate, which will affect the motherboard_the whole board will not be reset after power-on. The start-up waveform is abnormal, and it may cause unstable startup of the host.
3. 24.576 MHz audio crystal oscillator, connected to the sound card chip. If the crystal oscillator fails to vibrate, there may be problems such as no audio signal and failure to grasp the sound card.
4. 32.768 kHz cylindrical crystal oscillator, real-time crystal oscillator, connected to the South Bridge, 32.768 kHz crystal oscillator can directly affect the accuracy of the motherboard system clock, if it is damaged, the clock will be inaccurate, which is the same as the time of watches and mobile phones. One reason. Different motherboards have different problems caused by damage to the crystal oscillator. If the 32.768 kHz crystal oscillator on the motherboards with Intel, AMD, and ATI chips does not oscillate, the motherboard will not be powered on or the entire board will not be reset after power on. If the 32.768 kHz crystal oscillator in the NVIDIA chip motherboard fails to vibrate, it will run CF or 45 (corresponding digital card), and the digital card will run FF.
5. The 25 MHz crystal oscillator is connected to the network card chip. If the crystal oscillator fails to vibrate, it will not be powered on, or will be powered off or not powered on after power on. Unilateral start-up will also cause power off after power on. When it is used for the network card chip, the network card will not be caught if it does not vibrate, and the network will not be connected or the network light will not light if the frequency is abnormal.
6. The 27 MHz crystal oscillator provides the relevant working clock for the internal VGA part of the BGA. If the 27 MHz crystal oscillator fails to oscillate, it will affect the VGA display.
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