Aerobics Inc. LDT‑A06 is a treadmill controller board used in commercial fitness equipment, typically handling motor drive signals, speed regulation, and user interface logic. Common failure modes for this class of boards include burned or cracked power MOSFETs on the motor driver section, degraded capacitors on the high‑current supply rails, and intermittent I/O connections to the treadmill’s encoder and display modules. First‑check diagnostics: verify that the 48 V DC input is within spec and stable; inspect all surface‑mount components for visible damage or corrosion, especially around the motor drive ICs; and test the board’s logic outputs with a multimeter or oscilloscope while cycling through normal speed ranges to confirm proper signal integrity.[oss-gpt-20b]