Delta Tau Data Sys. 500‑602645‑104 is a digital quad amplifier servo drive that delivers closed‑loop motor control via four independent amplification channels. Common failure points for this model include power supply rail degradation (especially the +15V and ground planes), overheating of the onboard op‑amps or MOSFET drivers, and failure of decoupling capacitors on the I/O inputs. Initial troubleshooting should verify that all input voltage rails are within spec, inspect the board for burn marks or swollen electrolytics, and review any error codes displayed on the drive’s diagnostic panel. If these checks are normal, proceed to test each channel’s output with a scope probe and replace suspect components as needed.[oss-gpt-20b]