The Perma‑Drive PMD 220‑TR04 is a high‑current industrial motor drive controller designed for permanent‑magnet DC motors, typically used in conveyor and packaging equipment. Common failure points include over‑temperature degradation of the MOSFET array, burnt gate drivers, and capacitor leakage on the power supply section; these often manifest as erratic speed control or complete loss of output while the board may still show indicator LEDs. Initial diagnostics should verify that the 48 V DC input is within spec, inspect the heat sink for excessive buildup or cracked solder joints, and check all decoupling capacitors for bulging or leakage before reviewing any error codes from the onboard diagnostic LED sequence.[oss-gpt-20b]