Pincharm Sensor For the HP DesignJet 510, 500, 800 plotters - Refurbished (C7769-60378)

This is the pinch-arm sensor that detects the position of the media lever --includes sensor actuator (black plastic arm).  It is located behind the media lever on the right side of the plotter. A failing pinch-arm sensor is one possible cause for a persistent "lower blue lever" message during the paper loading process.