The Pacific Scientific 6410‑001‑C‑N‑N is a compact microstepping stepper drive that accepts step/direction inputs and supplies up to 7.1 A peak (5 A RMS) from a single 24–75 Vdc source, capable of driving both bipolar and unipolar two‑phase motors. Common failure points for this class include over‑current protection trips due to winding short circuits, degradation of the full‑bridge MOSFETs under high duty cycles, and loss of communication if the input logic levels fall outside the specified 0–5 V range. First‑check diagnostics: verify the power supply voltage and current rating; inspect the driver board for burnt or swollen components and check the motor leads for continuity; review any status LEDs or error codes that indicate over‑temperature, over‑current, or communication faults.[oss-gpt-20b]