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Home >> Plymouth >> 1978 >> Arrow Base, Standard Trans >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Auto. A/C Systems >> System Components >> Servo Assembly

Servo Assembly

A signal from amplifier causes an electric motor and gear train to position servo assembly's internal components as required by the signal. Servo motor rotates a rotary vacuum switch to open and close vacuum ports, and a wiper arm moves over a printed circuit board to change blower speeds. Blend door is positioned automatically by a servo arm connected-to servo gear train.

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