Saflok 73632 is a 3‑key card encoder module used in hotel and commercial access control systems. Common failure modes include power supply dropout (often due to the internal regulator), faulty contact pads on the key input board, and firmware corruption that can cause the encoder to stop generating valid key codes. First‑check diagnostics: verify the external 110/220 V supply is within spec and the encoder’s onboard LED status indicators are functioning; inspect the PCB for burnt traces or cracked solder joints around the power regulator and key contact pins; review any error logs or diagnostic LEDs on the host lock controller that reference “ENCODER FAIL” or similar.[oss-gpt-20b]