The Numark KMX01 is an all‑in‑one karaoke and DJ mixing station that combines dual CD+G drives with a built‑in mixer, three microphone inputs (with tone control), two composite video outputs, and ±12 % pitch control. Common failure points for this model include the internal CD drive motors or heads, the audio amplifier circuitry, the mic preamps, and the power supply board; users frequently report “no playback” or “audio distortion.”
First‑check diagnostics: verify that the 120 V AC input is present and that the unit’s power switch turns on without tripping a breaker; visually inspect the CD drive bays for obstructions or dust buildup; and confirm that all mic cables are securely connected to the preamps and that the mixer faders/knobs respond normally.[oss-gpt-20b]