CHAPTER 2 OUTLINE OF OPERATIONCOPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON DADF-H1 REV.0 MAR. 20012-363. JamsThis ADF uses the sensors shown in F02-301-03 to detect document jams. The timing atwhich document jam checks are made is stored in ROM on the ADF controller PCB. Theoccurrence of a jammed document at a particular sensor is established on the basis ofwhether the document is located at that sensor.When the ADF encounters a jam, it transmits coded information about the jam to the host.This ADF displays jam codes in two ways:• Service mode screen on the host• LED indications on the ADF controller PCBService mode screen on the hostF02-301-01LED indications on the ADF controller PCBF02-301-02Jam codes ;see Table T02-301-01 and later‘1’ indicates a jam in the machineLED4LED2LED3LED1DSW1PSW1
