Fault Causes: Loss or error of power sensor calibration coefficients; damage to or poor contact of the cable connecting the sensor and the main unit; degradation of internal power detection circuits (e.g., diode detectors); failure of the temperature compensation circuit causing measurements to be excessively affected by ambient temperature.
Maintenance Methods: Reload or input correct sensor calibration coefficients; replace the sensor connection cable and clean the interface to ensure good contact; test the output signal of the power detection circuit and replace degraded detection components; calibrate the temperature compensation circuit and replace faulty temperature sensors or compensation chips.
Fault Causes: Bent, oxidized, or damaged pins of the sensor interface; failure of the internal identification chip (ID chip) in the sensor; damage to components (e.g., resistors, capacitors) in the main unit's sensor recognition circuit; incompatibility of communication protocols between the sensor and the main unit (mismatched firmware versions).
Maintenance Methods: Repair bent interface pins, clean oxidized contacts with alcohol, and replace damaged interfaces; replace the internal ID chip of the sensor (requires professional repair); inspect the main unit's recognition circuit and replace damaged resistors or capacitors; upgrade the main unit or sensor firmware to compatible versions.
Fault Causes: Open circuit or poor contact in the display power supply line; failure of the display driver board (e.g., damaged driver chip); damage to the display backlight module (LEDs or tubes); loose communication cable between the mainboard and the display.
Maintenance Methods: Check the display power supply line, repair broken or loose connectors; inspect the display driver board and replace damaged driver chips; replace the backlight module to ensure normal backlighting; re-plug and fasten the communication cable between the mainboard and the display.
