Service manual

108 Theory of operation ENWW
Automatic duplexer sensors
Duplexer pickup delay jam
A duplexer pickup delay jam is assessed if the duplexer pickup paper sensor (PS503) does not
detect media within 4.9 seconds after the reversed paper sensor (PS501) detects the leading
edge.
Duplexer pickup stationary jam
A duplexer pickup stationary jam is assessed if the duplexer pickup paper sensor (PS503)
detects media after about 3.4 seconds has passed since the reversed paper sensor (PS501)
detected the trailing edge.
Paper-feed sensor
Jam detection for the paper feeders during the pickup and feed operations is same as that for the
printer. For jam detection, see page 106.