1. Turn on the machine and check the waveform of each channel one by one. It is found that channel 1 is seriously distorted.
2. Preliminary judgment of sampling board failure based on experience, disassemble the machine to inspect the main board, sampling board, channel board, etc.
3. The test result shows that a component of the sampling board is damaged. Replace the damaged component and restart the machine.
1 channel is normal, the waveform is stable without jitter, and the measurement value is accurate
4. After power-on aging, the instrument has good stability and the maintenance is completed.
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