NACHI FZS‑6357‑1‑11A is a single‑sided industrial control board used in motor drive or servo controller assemblies, typically supplying power regulation and signal conditioning for field‑effect transistors and protection circuits. Common failure points on this class of boards include burnt or cracked capacitors, damaged MOSFET gates, and corrosion on the green solder mask leading to shorted traces; overheating from inadequate ventilation can also cause component degradation. First‑check diagnostics: verify that the input supply voltage matches the board’s rated range and that all connectors are secure; inspect for visual signs of burn marks or electrolyte leakage on capacitors and check MOSFET gate resistors for continuity; finally, review any diagnostic LEDs or error codes displayed by the host controller to pinpoint fault locations.[oss-gpt-20b]