HP Color LaserJet Enterprise CP4020 Service Manual - Page 94
Paper-size detection and cassette-presence detection, using the PD media size switch.
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SR5 SR6 SR7 SR8 SR9 SR10 SR11 SR12 SW1 SW2 SW3 SW4 Tray 4 paper surface sensor 1 (3 x 500-sheet paper feeder only) Tray 4 paper surface sensor 2 (3 x 500-sheet paper feeder only) Tray 4 feed sensor (3 x 500-sheet paper feeder only) Tray 4 media-stack-surface sensor (3 x 500-sheet paper feeder only) Tray 5 paper surface sensor 1 (3 x 500-sheet paper feeder only) Tray 5 feed sensor (3 x 500-sheet paper feeder only) Tray 5 paper present sensor (3 x 500-sheet paper feeder only) Tray 5 media-stack-surface sensor (3 x 500-sheet paper feeder only) Tray 3, 4, and 5 right door switch Tray 3 paper size switches (3 x 500-sheet paper feeder only) Tray 4 paper size switches (3 x 500-sheet paper feeder only) Tray 5 paper size switches (3 x 500-sheet paper feeder only) Paper-size detection and cassette-presence detection The paper feeder detects the size of paper loaded in the paper feeder and the presence of the cassette using the PD media size switch. Paper size Universal A5 B5 Executive Letter A4 Legal No cassette Paper-feeder cassette media-size switch settings Top switch Center switch ON ON OFF OFF OFF ON ON OFF OFF ON ON OFF ON ON OFF OFF Bottom switch ON ON ON ON OFF OFF OFF OFF 62 Chapter 1 Theory of operation ENWW
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