The Technifor UC201/F Pin Stamp Controller is a marking‑head control module used in industrial coding and engraving systems, typically powered at 115–230 V AC with a 1.6 A current draw. Common failure modes for this class of unit include burned or tripped power fuses, damaged input/output contacts, and degradation of the internal microcontroller due to overheating or voltage spikes; visual inspection often reveals burnt PCB traces or swollen capacitors. First‑check diagnostics: verify that the supply voltage is within spec and the module’s fuse is intact, inspect all I/O connectors for corrosion or mechanical damage, and review any error codes displayed on the panel or logged by the host PLC.[oss-gpt-20b]