1. Instrument model: Tektronix DPO7254 oscilloscope
2. Fault: abnormal baseline waveform, self-test error, self-calibration failure
3. Maintenance and inspection:
After self-diagnosis, it was found that the instrument acquisition board reported multiple errors, indicating that the acquisition board module had damaged components. Combined with the fault phenomenon, the fault was located in the acquisition module and channel components.
4.Maintenance:
Replace damaged components, modules, adjust instrument indicators, and repair instruments
Repair result: The oscilloscope was repaired successfully.
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