NuArc FT26V3UP‑SK is an Ultra‑Plus Flip‑Top platemaker/UV‑LED marking unit that uses a 220 V/16 A supply, two UV lamps, a stepper motor with EZI‑Air cooling, and a PLC‑based controller for programmable exposure. Common failure points on this class of equipment include lamp ballast or LED module degradation, stepper driver overheating or phase loss, PLC firmware corruption, and vacuum table seal leaks that affect plate contact. First‑check diagnostics: verify the 220 V input voltage and current draw against spec; inspect lamp sockets and LEDs for discoloration or burn marks; confirm PLC status lights and error codes, and examine the stepper motor wiring for continuity and proper phase sequencing.[oss-gpt-20b]