Sony Magnescale SR‑1711 is a high‑precision linear encoder scale used with Sony DRO units (e.g., LF100). Common failure modes in this class include contact wear or contamination on the scale surface, misalignment of the head relative to the scale, and degradation of the magnetic sensor circuitry. Typical repair actions involve cleaning the scale track with a lint‑free cloth and isopropyl alcohol, inspecting for physical damage or debris, and verifying that the encoder head’s alignment screws are properly torqued. First‑check diagnostics: confirm power supply voltage to the DRO unit, inspect I/O connections for continuity, visually examine the scale for scratches or contaminants, and review any error codes displayed on the DRO readout.[oss-gpt-20b]