ADF document skew detection 1 One of the skew sensors is activated. 2 A signal is sent to the SCB. 3 The SCB begins to read a certain number of clock pulses in 6 mm (.02 inch). 4 A skew jam is not reported if the second skew sensor is activated before the allotted number of pulses. Note Skew detection is only performed when the document width is less than or equal to 257 mm (10.1 inches). Figure 58. Document skew jam 92 Chapter 5 Theory of operation C8523-90921