Kikusui PCR1000L is a single‑phase, 1 kVA AC power source capable of 0–300 V output at up to 10 A and programmable waveforms (harmonics, ramps, micro cuts). Common failure points in this class include overheating of the internal transformer or switching MOSFETs, degradation of the input/output capacitors, and failure of the control ICs that manage voltage regulation. First‑check diagnostics should verify that the unit receives proper line voltage and frequency, confirm output voltage/current with a calibrated multimeter, inspect for visible signs of component damage (burnt traces, swollen electrolytics), and review any fault codes displayed on the front panel or via GPIB interface.[oss-gpt-20b]