The Coutant‑Lambda Alpha 600W AC/DC modular power supply (model H60167/H60329) is a high‑current, multi‑output unit commonly used in mass spectrometer platforms and other laboratory instrumentation. Common failure points include the internal switching regulator (MOSFETs or IGBTs), output capacitors, and the main transformer winding; overheating or overvoltage can also damage the protection circuitry. Initial checks should verify that the input voltage is within spec (100–230 V AC or 160–358 V DC) and that the supply’s fuse/thermal cut‑out has not tripped, then inspect for visible signs of component burn or corrosion on the PCB and output connectors. Finally, measure each output channel with a calibrated multimeter to confirm correct voltage/current levels before proceeding with deeper diagnostics.[oss-gpt-20b]