by its own driving force and the multiple-fed paper are pushed back to the cassette. Therefore, single sheet is fed into the product. Figure 1-44 500-sheet paper feeder multiple-feed prevention PF cassette pickup roller PF cassette feed roller Driving force transmitted from the PF cassette feed roller Paper Driving force transmitted from the PF cassette pickup motor PF cassette separation roller 500-sheet paper feeder jam detection The paper feeder uses the PF cassette media feed sensor (SR1) to detect the presence of paper and to check whether paper is being fed correctly or has jammed.
Figure 1-45 500-sheet paper feeder cassette jam detection sensor SR1 PF cassette media feed sensor No pick jam 2 The PF cassette media feed sensor does not detect the leading edge of paper within a specified period (including 2 retries) from when the PF cassette pickup solenoid is turned on. Residual paper jam 1 The PF cassette media feed sensor detects a paper-presence when the automatic delivery is complete. 56 Chapter 1 Theory of operation ENWW