5-34 Functional Information
Figure 5-20 Paper Path
The presence of paper in Tray 1 is detected by the Tray 1 Paper 
Sensor (PS105). Presence of paper in Tray 2 is detected by the Tray 2 
Paper Sensor (PS101) for the HP LaserJet 4000, 4000 N, 4050 and 
4050 N; and by the Upper Tray Paper Sensor (PS101) or the Lower 
Tray Paper Sensor (PS102) for the HP LaserJet 4000 T, 4000 TN, 
4050 T, and 4050 TN.
Both the size of the paper in the tray and the presence of a tray are 
detected by the three switches (SW600, 601, 602) on the Paper Size 
Detection PCA for the HP LaserJet 4000, 4000 N, 4050, and 4050 N, 
For more information on the LaserJet 4000 / 4050 Visit www.PrinterSupplies.com 800-551-1943