The MOOG D122‑034‑A001C is an electronic control board used to drive and monitor servo valves in industrial motion‑control systems such as injection molding or CNC machines. Common failures on this model include burnt or tripped protection diodes, degraded surface‑mount power MOSFETs, and intermittent I²C/SPI communication faults due to solder joint fatigue; the board’s voltage regulator IC is also a frequent point of failure in high‑temperature environments. For troubleshooting, first verify that the 24 V DC supply rails are within spec and that all decoupling capacitors are present and intact; next check for visible signs of component damage or corrosion on the PCB, then use an oscilloscope to confirm proper timing signals on the valve driver outputs and inspect the I²C/SPI bus for correct data integrity.[oss-gpt-20b]