The Delta Tau 500‑602645‑104 is a Quad‑Amp 4‑axis digital amplifier used to drive servo motors in industrial motion systems. Common issues with this model include power supply failures (over‑voltage or under‑current on the 48 V rail), overheating of the integrated driver chips, and loss of communication over the serial I/O bus due to damaged headers or firmware corruption. Initial diagnostics should verify that the unit receives correct input voltage and current limits, inspect for burn marks or swollen capacitors on the board, and read any stored error codes via the diagnostic port; if the amplifier reports a “driver fault” or “bus timeout,” replace the affected driver ICs or re‑flash the firmware.[oss-gpt-20b]