Transfer Unit Paper Sensor (Paper Moving Sensor) (Pms); Control Principles - Printronix L5535 Maintenance Manual

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The power paper stacker contains the control detectors (sensors and

switches) described in the following sections.

Transfer Unit Paper Sensor (Paper Moving Sensor)

The transfer unit paper sensor is a photointerrupter that is composed of a light

emitter and receptor and a lever. This sensor is located partway in the paper

guide at the entrance of the power stacker. When paper output from the

printer passes through the guide and kicks the lever, the light passing

between the light emitter and receptor is blocked, causing paper to be

Light Emitter and Receptor