Sony Magnescale LH11‑3R is a dual‑axis digital readout (DRO) unit used in precision machining and measurement systems, featuring magnetic scale input and a high‑resolution LCD display. Common failure modes include loss of signal from the scale cables, drift or “stuck” display due to internal counter errors, power supply instability causing intermittent resets, and corrosion or mechanical damage to the connector pins. First‑check diagnostics should verify that the 12 V DC supply is within spec and stable, inspect all scale cable connections for continuity and proper seating, and review any error codes displayed on the unit’s LCD; if no code appears, perform a visual inspection of the PCB for burnt components or loose solder joints.[oss-gpt-20b]