The Sony Magnescale LA10‑21THO is a digital readout (DRO) module designed to display linear position or displacement from magnetic encoder inputs in industrial machining and measurement systems. Common failure modes for this class of DROs include loss of signal due to broken or corroded encoder contacts, power supply voltage drift affecting the analog-to-digital converter, and firmware corruption leading to incorrect scaling or blank displays. First‑check diagnostics should verify that the module receives its rated input voltage (typically 12 VDC) and that the ground reference is secure; inspect the encoder cable for continuity and physical damage; and review any diagnostic LEDs or error codes on the unit’s front panel before proceeding with firmware reflash or component replacement.[oss-gpt-20b]