Erratic operation of the device represented in the diagram labeled "A" shown in the illustration could be traced to what condition? Illustration EL-0092

Correct Answer: Option C — improper contact at "R" slip rings or "S" connections

Synchro receiver and transmitter accuracy depends entirely upon low-resistance electrical contact across excitation slip rings and stator interconnecting leads. Improper contact at the 'R' rotor slip rings or 'S' stator connections introduces voltage imbalances, causing erratic hunting, buzzing, and positioning errors in instrumentation.