The Hitachi Metals 8‑1106 is a compact industrial power supply module typically used in factory automation or control cabinets. Common failure points for this class of supplies include degraded capacitors on the input filter, burnt-out MOSFETs or IGBTs due to overcurrent, and damaged output diodes from voltage spikes. Begin by verifying that the unit receives its rated AC input voltage and that the output rails match specification; then inspect the PCB for visual signs of component damage such as burn marks or swollen electrolytics. Finally, check for any fault codes displayed on an attached controller or log, and confirm that all fuses and protection devices are intact before proceeding with deeper diagnostics.[oss-gpt-20b]