Accurpress SMW 50 is an industrial control unit used on Accurpress press brakes and indexer systems, integrating motor drives, back‑gauge control and CNC interface. Common failures include power supply board faults (brown‑out or over‑voltage), degraded I/O contacts on the controller panel, and firmware corruption that can lock the system in a fault state. For this class of equipment, watch for overheating of the main driver ICs, burnt capacitors on the 24 V rail, and loose or corroded terminal connections. First‑check diagnostics: verify the 24 V DC supply is within spec, test all I/O terminals with a multimeter, inspect the board for visible damage (burn marks, cracked components), and review any error codes displayed on the panel or logged in the CNC host software.[oss-gpt-20b]