The JC150‑0032 is a single‑axis industrial joystick controller from Penny & Giles, featuring an IP65‑sealed lever, a long‑life conductive plastic potentiometer track and selectable spring‑to‑centre or friction‑hold action via directional/centre off‑or‑end switches. Common failure modes include worn or damaged potentiometer tracks causing erratic position feedback, switch contact wear leading to stuck centre or end positions, and connector corrosion that can interrupt power or signal lines. First‑check diagnostics should verify the 24 V DC supply to the unit, visually inspect the potentiometer track for scratches or debris, and test each switch with a multimeter for continuity and proper off/centre/on states before proceeding to more detailed signal analysis.[oss-gpt-20b]