Sony Magnescale Inc. LH31A-2 Digital Readout

The Sony Magnescale LH31A‑2 is a dual‑axis digital readout (DRO) that accepts 220–240 VAC and provides calibrated linear measurement via integrated magnetic scales. Common failure points in this class include power supply degradation, coil or sensor drift, and PCB solder joint fatigue; the display may also suffer from backlight failure or LCD panel burn‑in. Initial checks should verify proper line voltage to the unit, inspect the input transformer and rectifier for overheating or cracked traces, and confirm that the DRO’s internal calibration settings match the attached scale. Next, examine the LCD panel for visible cracks or discoloration, test the output signal with a multimeter or oscilloscope against expected voltage levels, and review any error codes displayed on the unit.[oss-gpt-20b]

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