The Okuma PPS‑60C E4809‑747‑005‑E is a CNC controller board used in industrial machine tools such as the TH604 series, providing multiprocessor NC logic and I/O interfacing. Common failure points on this class of boards include burnt or tripped MOSFETs on power rails, degraded capacitors on the 12 V/5 V regulators, and damaged ICs (e.g., microcontrollers or DSPs) that can cause loss of communication or erratic motion control. First‑check diagnostics: verify all input and output voltages against the datasheet; inspect for visual signs of overheating or component damage; and review any stored error codes on the machine’s diagnostic display before proceeding to board replacement or reflow repair.[oss-gpt-20b]