The Indramat TVD 1.3‑08‑03 is a high‑power DC bus supply module that delivers 7.5 kW continuous at 320 V DC from a 380–480 V AC input, used to feed Indramat drives and servo motors. Common failure points for this model include overheating of the internal switching MOSFETs, degradation of the heat sink or fan, fuse blowouts on the AC side, and insulation breakdown between the DC bus and chassis. First‑check diagnostics should verify that the incoming 380–480 V AC is within spec and that the phase currents are balanced; then measure the output DC bus voltage for correct regulation and inspect the cooling system for airflow obstruction or fan failure; finally review any fault codes on the connected drive controller for indications of power supply faults.[oss-gpt-20b]